003 - Station Assembly, Practise and Safety Flashcards
(198 cards)
1
Q
B-003-001-001
A low pass filter in an HF station is most effective when connected:
(a) as close as possible to the antenna tuner output
(b) as close as possible to the antenna
(c) as close as possible to the transceiver output
(d) midway between the transceiver and antenna
A
B-003-001-001
A low pass filter in an HF station is most effective when connected:
(c) as close as possible to the transceiver output
2
Q
B-003-001-002
A low pass filter in an HF station is most effective when connected:
(a) as close as possible to the linear amplifier output
(b) as close as possible to the antenna
(c) as close as possible to the antenna tuner output
(d) as close as possible to the linear amplifier input
A
B-003-001-002
A low pass filter in an HF station is most effective when connected:
(a) as close as possible to the linear amplifier output
3
Q
B-003-001-003
In designing an HF station, which component would you use to reduce the effects of harmonic radiation?
(a) Dummy load
(b) Antenna switch
(c) SWR bridge
(d) Low pass filter
A
B-003-001-003
In designing an HF station, which component would you use to reduce the effects of harmonic radiation?
(d) Low pass filter
4
Q
B-003-001-004
Which component in an HF station is the most useful for determining the effectiveness of the antenna system?
(a) Antenna switch
(b) SWR bridge
(c) Linear amplifier
(d) Dummy load
A
B-003-001-004
Which component in an HF station is the most useful for determining the effectiveness of the antenna system?
(b) SWR bridge
5
Q
B-003-001-005
Of the components in an HF station, which component would normally be connected closest to the antenna, antenna tuner and dummy load?
(a) Transceiver
(b) Antenna switch
(c) Low pass filter
(d) SWR bridge
A
B-003-001-005
Of the components in an HF station, which component would normally be connected closest to the antenna, antenna tuner and dummy load?
(b) Antenna switch
6
Q
B-003-001-006
Of the components in an HF station, which component would be used to match impedances between the transceiver and antenna?
(a) Antenna tuner
(b) Antenna switch
(c) Dummy load
(d) SWR bridge
A
B-003-001-006
Of the components in an HF station, which component would be used to match impedances between the transceiver and antenna?
(a) Antenna tuner
7
Q
B-003-001-007
In an HF station, which component is temporarily connected in the tuning process or for adjustments to the transmitter?
(a) SWR bridge
(b) Low pass filter
(c) Dummy load
(d) Antenna tuner
A
B-003-001-007
In an HF station, which component is temporarily connected in the tuning process or for adjustments to the transmitter?
(c) Dummy load
8
Q
B-003-001-008
In an HF station, the antenna tuner is usually used for matching the transceiver with:
(a) most antennas when operating above 14 MHz
(b) mono-band Yagi type antennas
(c) tri-band Yagi antennas
(d) most antennas when operating below 14 MHz
A
B-003-001-008
In an HF station, the antenna tuner is usually used for matching the transceiver with:
(d) most antennas when operating below 14 MHz
9
Q
B-003-001-009
In an HF Station, the antenna tuner is commonly used:
(a) with most antennas when operating above 14 MHz
(b) to tune into dummy loads
(c) to tune low pass filters
(d) with most antennas when operating below 14 MHz
A
B-003-001-009
In an HF Station, the antenna tuner is commonly used:
(d) with most antennas when operating below 14 MHz
10
Q
B-003-002-001
In a frequency modulation transmitter, the input to the speech amplifier is connected to the:
(a) microphone
(b) modulator
(c) power amplifier
(d) frequency multiplier
A
B-003-002-001
In a frequency modulation transmitter, the input to the speech amplifier is connected to the:
(a) microphone
11
Q
B-003-002-002
In a frequency modulation transmitter, the microphone is connected to the:
(a) speech amplifier
(b) modulator
(c) power amplifier
(d) oscillator
A
B-003-002-002
In a frequency modulation transmitter, the microphone is connected to the:
(a) speech amplifier
12
Q
B-003-002-003
In a frequency modulation transmitter, the ____________is in between the speech amplifier and the oscillator.
(a) power amplifier
(b) modulator
(c) microphone
(d) frequency multiplier
A
B-003-002-003
In a frequency modulation transmitter, the ____________is in between the speech amplifier and the oscillator.
(b) modulator
13
Q
B-003-002-004
In a frequency modulation transmitter, the __________is located between the modulator and the frequency multiplier.
(a) oscillator
(b) speech amplifier
(c) power amplifier
(d) microphone
A
B-003-002-004
In a frequency modulation transmitter, the __________is located between the modulator and the frequency multiplier.
(a) oscillator
14
Q
B-003-002-005
In a frequency modulation transmitter, the ___________is located between the oscillator and the power amplifier.
(a) frequency multiplier
(b) microphone
(c) speech amplifier
(d) modulator
A
B-003-002-005
In a frequency modulation transmitter, the ___________is located between the oscillator and the power amplifier.
(a) frequency multiplier
15
Q
B-003-002-006
In a frequency modulation transmitter, the _________ is located between the frequency multiplier and the antenna.
(a) modulator
(b) power amplifier
(c) speech amplifier
(d) oscillator
A
B-003-002-006
In a frequency modulation transmitter, the _________ is located between the frequency multiplier and the antenna.
(b) power amplifier
16
Q
B-003-002-007
In a frequency modulation transmitter, the power amplifier output is connected to the:
(a) frequency multiplier
(b) antenna
(c) microphone
(d) modulator
A
B-003-002-007
In a frequency modulation transmitter, the power amplifier output is connected to the:
(b) antenna
17
Q
B-003-003-001
In a frequency modulation receiver, the ________is connected to the input of the radio frequency amplifier.
(a) antenna
(b) mixer
(c) frequency discriminator
(d) limiter
A
B-003-003-001
In a frequency modulation receiver, the ________is connected to the input of the radio frequency amplifier.
(a) antenna
18
Q
B-003-003-002
In a frequency modulation receiver, the __________ is in between the antenna and the mixer.
(a) audio frequency amplifier
(b) local oscillator
(c) radio frequency amplifier
(d) intermediate frequency amplifier
A
B-003-003-002
In a frequency modulation receiver, the __________ is in between the antenna and the mixer.
(c) radio frequency amplifier
19
Q
B-003-003-003
In a frequency modulation receiver, the output of the local oscillator is fed to the:
(a) radio frequency amplifier
(b) mixer
(c) limiter
(d) antenna
A
B-003-003-003
In a frequency modulation receiver, the output of the local oscillator is fed to the:
(b) mixer
20
Q
B-003-003-004
In a frequency modulation receiver, the output of the ________is connected to the mixer.
(a) local oscillator
(b) frequency discriminator
(c) intermediate frequency amplifier
(d) speaker or headphones
A
B-003-003-004
In a frequency modulation receiver, the output of the ________is connected to the mixer.
(a) local oscillator
21
Q
B-003-003-005
In a frequency modulation receiver, the_________ is in between the mixer and the intermediate frequency amplifier.
(a) limiter
(b) filter
(c) frequency discriminator
(d) radio frequency amplifier
A
B-003-003-005
In a frequency modulation receiver, the_________ is in between the mixer and the intermediate frequency amplifier.
(b) filter
22
Q
B-003-003-006
In a frequency modulation receiver, the ________ is located between the filter and the limiter.
(a) local oscillator
(b) intermediate frequency amplifier
(c) mixer
(d) radio frequency amplifier
A
B-003-003-006
In a frequency modulation receiver, the ________ is located between the filter and the limiter.
(b) intermediate frequency amplifier
23
Q
B-003-003-007
In a frequency modulation receiver, the__________ is in between the intermediate frequency amplifier and the frequency discriminator.
(a) filter
(b) local oscillator
(c) limiter
(d) radio frequency amplifier
A
B-003-003-007
In a frequency modulation receiver, the__________ is in between the intermediate frequency amplifier and the frequency discriminator.
(c) limiter
24
Q
B-003-003-008
In a frequency modulation receiver, the __________ is located between the limiter and the audio frequency amplifier.
(a) frequency discriminator
(b) intermediate frequency amplifier
(c) speaker or headphones
(d) local oscillator
A
B-003-003-008
In a frequency modulation receiver, the __________ is located between the limiter and the audio frequency amplifier.
(a) frequency discriminator
25
B-003-003-009
In a frequency modulation receiver, the _________ is located between the speaker or headphones and the frequency discriminator.
(a) limiter
(b) audio frequency amplifier
(c) intermediate frequency amplifier
(d) radio frequency amplifier
B-003-003-009
In a frequency modulation receiver, the _________ is located between the speaker or headphones and the frequency discriminator.
(b) audio frequency amplifier
26
B-003-003-010
In a frequency modulation receiver, the __________ connects to the audio frequency amplifier output.
(a) intermediate frequency amplifier
(b) frequency discriminator
(c) limiter
(d) speaker or headphones
B-003-003-010
In a frequency modulation receiver, the __________ connects to the audio frequency amplifier output.
(d) speaker or headphones
27
B-003-004-001
In a CW transmitter, the output from the __________ is connected to the driver/buffer.
(a) master oscillator
(b) power amplifier
(c) telegraph key
(d) power supply
B-003-004-001
In a CW transmitter, the output from the __________ is connected to the driver/buffer.
(a) master oscillator
28
B-003-004-002
In a typical CW transmitter, the ___________ is the primary source of direct current.
(a) driver/buffer
(b) power amplifier
(c) power supply
(d) master oscillator
B-003-004-002
In a typical CW transmitter, the ___________ is the primary source of direct current.
(c) power supply
29
B-003-004-003
In a CW transmitter, the_________ is between the master oscillator and the power amplifier.
(a) audio amplifier
(b) power supply
(c) telegraph key
(d) driver/buffer
B-003-004-003
In a CW transmitter, the_________ is between the master oscillator and the power amplifier.
(d) driver/buffer
30
B-003-004-004
In a CW transmitter, the_____________ controls when RF energy is applied to the antenna.
(a) master oscillator
(b) telegraph key
(c) driver/buffer
(d) power amplifier
B-003-004-004
In a CW transmitter, the_____________ controls when RF energy is applied to the antenna.
(b) telegraph key
31
B-003-004-005
In a CW transmitter, the ______________ is in between the driver/buffer stage and the antenna.
(a) power supply
(b) telegraph key
(c) power amplifier
(d) master oscillator
B-003-004-005
In a CW transmitter, the ______________ is in between the driver/buffer stage and the antenna.
(c) power amplifier
32
B-003-004-006
In a CW transmitter, the output of the _____________ is transferred to the antenna.
(a) driver/buffer
(b) power supply
(c) master oscillator
(d) power amplifier
B-003-004-006
In a CW transmitter, the output of the _____________ is transferred to the antenna.
(d) power amplifier
33
B-003-005-001
In a single sideband and CW receiver, the antenna is connected to the ____________ .
(a) product detector
(b) local oscillator
(c) intermediate frequency amplifier
(d) radio frequency amplifier
B-003-005-001
In a single sideband and CW receiver, the antenna is connected to the ____________ .
(d) radio frequency amplifier
34
B-003-005-002
In a single sideband and CW receiver, the output of the _____________ is connected to the mixer.
(a) filter
(b) intermediate frequency amplifier
(c) audio frequency amplifier
(d) radio frequency amplifier
B-003-005-002
In a single sideband and CW receiver, the output of the _____________ is connected to the mixer.
(d) radio frequency amplifier
35
B-003-005-003
In a single sideband and CW receiver, the __________ is connected to the radio frequency amplifier and the local oscillator.
(a) beat frequency oscillator
(b) mixer
(c) product detector
(d) filter
B-003-005-003
In a single sideband and CW receiver, the __________ is connected to the radio frequency amplifier and the local oscillator.
(b) mixer
36
B-003-005-004
In a single sideband and CW receiver, the output of the ___________ is connected to the mixer.
(a) intermediate frequency amplifier
(b) local oscillator
(c) beat frequency oscillator
(d) product detector
B-003-005-004
In a single sideband and CW receiver, the output of the ___________ is connected to the mixer.
(b) local oscillator
37
B-003-005-005
In a single sideband and CW receiver, the _____________ is in between the mixer and intermediate frequency amplifier.
(a) radio frequency amplifier
(b) filter
(c) beat frequency oscillator
(d) product detector
B-003-005-005
In a single sideband and CW receiver, the _____________ is in between the mixer and intermediate frequency amplifier.
(b) filter
38
B-003-005-006
In a single sideband and CW receiver, the __________ is in between the filter and product detector.
(a) intermediate frequency amplifier
(b) audio frequency amplifier
(c) beat frequency oscillator
(d) radio frequency amplifier
B-003-005-006
In a single sideband and CW receiver, the __________ is in between the filter and product detector.
(a) intermediate frequency amplifier
39
B-003-005-007
In a single sideband and CW receiver, the __________ output is connected to the audio frequency amplifier.
(a) local oscillator
(b) beat frequency oscillator
(c) product detector
(d) intermediate frequency amplifier
B-003-005-007
In a single sideband and CW receiver, the __________ output is connected to the audio frequency amplifier.
(c) product detector
40
B-003-005-008
In a single sideband and CW receiver, the output of the ___________ is connected to the product detector.
(a) mixer
(b) radio frequency amplifier
(c) beat frequency oscillator
(d) audio frequency amplifier
B-003-005-008
In a single sideband and CW receiver, the output of the ___________ is connected to the product detector.
(c) beat frequency oscillator
41
B-003-005-009
In a single sideband and CW receiver, the __________ is connected to the output of the product detector.
(a) intermediate frequency amplifier
(b) local oscillator
(c) audio frequency amplifier
(d) radio frequency amplifier
B-003-005-009
In a single sideband and CW receiver, the __________ is connected to the output of the product detector.
(c) audio frequency amplifier
42
B-003-005-010
In a single sideband and CW receiver, the __________ is connected to the output of the audio frequency amplifier.
(a) speaker or headphones
(b) mixer
(c) radio frequency amplifier
(d) beat frequency oscillator
B-003-005-010
In a single sideband and CW receiver, the __________ is connected to the output of the audio frequency amplifier.
(a) speaker or headphones
43
B-003-006-001
In a single sideband transmitter, the output of the ________ is connected to the balanced modulator.
(a) variable frequency oscillator
(b) radio frequency oscillator
(c) linear amplifier
(d) mixer
B-003-006-001
In a single sideband transmitter, the output of the ________ is connected to the balanced modulator.
(b) radio frequency oscillator
44
B-003-006-002
In a single sideband transmitter, the output of the ____________ is connected to the filter.
(a) microphone
(b) mixer
(c) radio frequency oscillator
(d) balanced modulator
B-003-006-002
In a single sideband transmitter, the output of the ____________ is connected to the filter.
(d) balanced modulator
45
B-003-006-003
In a single sideband transmitter, the _____________ is in between the balanced modulator and the mixer.
(a) radio frequency oscillator
(b) speech amplifier
(c) filter
(d) microphone
B-003-006-003
In a single sideband transmitter, the _____________ is in between the balanced modulator and the mixer.
(c) filter
46
B-003-006-004
In a single sideband transmitter, the ______________ is connected to the speech amplifier.
(a) radio frequency oscillator
(b) filter
(c) mixer
(d) microphone
B-003-006-004
In a single sideband transmitter, the ______________ is connected to the speech amplifier.
(d) microphone
47
B-003-006-005
In a single sideband transmitter, the output of the ___________ is connected to the balanced modulator.
(a) speech amplifier
(b) filter
(c) variable frequency oscillator
(d) linear amplifier
B-003-006-005
In a single sideband transmitter, the output of the ___________ is connected to the balanced modulator.
(a) speech amplifier
48
B-003-006-006
In a single sideband transmitter, the output of the variable frequency oscillator is connected to the __________.
(a) mixer
(b) antenna
(c) balanced modulator
(d) linear amplifier
B-003-006-006
In a single sideband transmitter, the output of the variable frequency oscillator is connected to the __________.
(a) mixer
49
B-003-006-007
In a single sideband transmitter, the output of the _________ is connected to the mixer.
(a) radio frequency oscillator
(b) variable frequency oscillator
(c) linear amplifier
(d) antenna
B-003-006-007
In a single sideband transmitter, the output of the _________ is connected to the mixer.
(b) variable frequency oscillator
50
B-003-006-008
In an single sideband transmitter, the ____________ is in between the mixer and the antenna.
(a) variable frequency oscillator
(b) balanced modulator
(c) radio frequency oscillator
(d) linear amplifier
B-003-006-008
In an single sideband transmitter, the ____________ is in between the mixer and the antenna.
(d) linear amplifier
51
B-003-006-009
In a single sideband transmitter, the output of the linear amplifier is connected to the ______________.
(a) filter
(b) antenna
(c) variable frequency oscillator
(d) speech amplifier
B-003-006-009
In a single sideband transmitter, the output of the linear amplifier is connected to the ______________.
(b) antenna
52
B-003-007-001
In an amateur digital radio system, the __________________interfaces with the computer.
(a) antenna
(b) power supply
(c) transceiver
(d) input/output
B-003-007-001
In an amateur digital radio system, the __________________interfaces with the computer.
(d) input/output
53
B-003-007-002
In an amateur digital radio system, the modem is connected to the ________.
(a) amplifier
(b) computer
(c) antenna
(d) input/output
B-003-007-002
In an amateur digital radio system, the modem is connected to the ________.
(b) computer
54
B-003-007-003
In an amateur digital radio system, the transceiver is connected to the ___________.
(a) modem
(b) computer
(c) scanner
(d) input/output
B-003-007-003
In an amateur digital radio system, the transceiver is connected to the ___________.
(a) modem
55
B-003-007-004
In an amateur digital radio system, the audio connections of the modem/sound card are connected to the ___________.
(a) input/output
(b) transceiver
(c) scanner
(d) antenna
B-003-007-004
In an amateur digital radio system, the audio connections of the modem/sound card are connected to the ___________.
(b) transceiver
56
B-003-007-005
In an amateur digital radio system, the modem function is often performed by the computer____________ .
(a) keyboard
(b) scanner
(c) serial port
(d) sound card
B-003-007-005
In an amateur digital radio system, the modem function is often performed by the computer____________ .
(d) sound card
57
B-003-008-001
In a regulated power supply, the transformer connects to an external source which is referred to as______________.
(a) regulator
(b) filter
(c) input
(d) rectifier
B-003-008-001
In a regulated power supply, the transformer connects to an external source which is referred to as______________.
(c) input
58
B-003-008-002
In a regulated power supply, the _______________ is between the input and the rectifier.
(a) output
(b) regulator
(c) transformer
(d) filter
B-003-008-002
In a regulated power supply, the _______________ is between the input and the rectifier.
(c) transformer
59
B-003-008-003
In a regulated power supply, the _______________ is between the transformer and the filter.
(a) input
(b) output
(c) rectifier
(d) regulator
B-003-008-003
In a regulated power supply, the _______________ is between the transformer and the filter.
(c) rectifier
60
B-003-008-004
In a regulated power supply, the output of the rectifier is connected to the ______________.
(a) output
(b) filter
(c) transformer
(d) regulator
B-003-008-004
In a regulated power supply, the output of the rectifier is connected to the ______________.
(b) filter
61
B-003-008-005
In a regulated power supply, the output of the filter connects to the ____________________.
(a) transformer
(b) rectifier
(c) output
(d) regulator
B-003-008-005
In a regulated power supply, the output of the filter connects to the ____________________.
(d) regulator
62
B-003-008-006
In a regulated power supply, the _______________is connected to the regulator.
(a) rectifier
(b) input
(c) output
(d) transformer
B-003-008-006
In a regulated power supply, the _______________is connected to the regulator.
(c) output
63
B-003-009-001
In a Yagi 3 element directional antenna, the ____________ is primarily for mechanical support purposes.
(a) reflector
(b) driven element
(c) boom
(d) director
B-003-009-001
In a Yagi 3 element directional antenna, the ____________ is primarily for mechanical support purposes.
(c) boom
64
B-003-009-002
In a Yagi 3 element directional antenna, the ________ is the longest radiating element.
(a) director
(b) reflector
(c) driven element
(d) boom
B-003-009-002
In a Yagi 3 element directional antenna, the ________ is the longest radiating element.
(b) reflector
65
B-003-009-003
In a Yagi 3 element directional antenna, the ______________ is the shortest radiating element.
(a) boom
(b) director
(c) reflector
(d) driven element
B-003-009-003
In a Yagi 3 element directional antenna, the ______________ is the shortest radiating element.
(b) director
66
B-003-009-004
In a Yagi 3 element directional antenna, the ______________is not the longest nor the shortest radiating element.
(a) boom
(b) director
(c) reflector
(d) driven element
B-003-009-004
In a Yagi 3 element directional antenna, the ______________is not the longest nor the shortest radiating element.
(d) driven element
67
B-003-010-001
Which list of emission types is in order from the narrowest bandwidth to the widest bandwidth?
(a) CW, SSB voice, RTTY, FM voice
(b) CW, FM voice, RTTY, SSB voice
(c) CW, RTTY, SSB voice, FM voice
(d) RTTY, CW, SSB voice, FM voice
B-003-010-001
Which list of emission types is in order from the narrowest bandwidth to the widest bandwidth?
(c) CW, RTTY, SSB voice, FM voice
68
B-003-010-002
The figure in a receiver's specifications which indicates its sensitivity is the:
(a) audio output in watts
(b) bandwidth of the IF in kilohertz
(c) number of RF amplifiers
(d) RF input signal needed to achieve a given signal plus noise to noise ratio
B-003-010-002
The figure in a receiver's specifications which indicates its sensitivity is the:
(d) RF input signal needed to achieve a given signal plus noise to noise ratio
69
B-003-010-003
If two receivers of different sensitivity are compared, the less sensitive receiver will produce:
(a) a steady oscillator drift
(b) more than one signal
(c) less signal or more noise
(d) more signal or less noise
B-003-010-003
If two receivers of different sensitivity are compared, the less sensitive receiver will produce:
(c) less signal or more noise
70
B-003-010-004
Which of the following modes of transmission is usually detected with a product detector?
(a) Double sideband full carrier
(b) Frequency modulation
(c) Pulse modulation
(d) Single sideband suppressed carrier
B-003-010-004
Which of the following modes of transmission is usually detected with a product detector?
(d) Single sideband suppressed carrier
71
B-003-010-005
A receiver designed for SSB reception must have a BFO (beat frequency oscillator) because:
(a) it beats with the received carrier to produce the other sideband
(b) it reduces the passband of the IF stages
(c) the suppressed carrier must be replaced for detection
(d) it phases out the unwanted sideband signal
B-003-010-005
A receiver designed for SSB reception must have a BFO (beat frequency oscillator) because:
(c) the suppressed carrier must be replaced for detection
72
B-003-010-006
A receiver receives an incoming signal of 3.54 MHz, and the local oscillator produces a signal of 3.995 MHz. To which frequency should the IF be tuned?
(a) 7.435 MHz
(b) 3.995 MHz
(c) 3.54 MHz
(d) 455 kHz
B-003-010-006
A receiver receives an incoming signal of 3.54 MHz, and the local oscillator produces a signal of 3.995 MHz. To which frequency should the IF be tuned?
(d) 455 kHz
73
B-003-010-007
What kind of filter would you use to attenuate an interfering carrier signal while receiving an SSB transmission?
(a) A band pass filter
(b) A notch filter
(c) An all pass filter
(d) A pi-network filter
B-003-010-007
What kind of filter would you use to attenuate an interfering carrier signal while receiving an SSB transmission?
(b) A notch filter
74
B-003-010-008
The three main parameters against which the quality of a receiver is measured are:
(a) selectivity, stability and frequency range
(b) sensitivity, stability and cross-modulation
(c) sensitivity, selectivity and image rejection
(d) sensitivity, selectivity and stability
B-003-010-008
The three main parameters against which the quality of a receiver is measured are:
(d) sensitivity, selectivity and stability
75
B-003-010-009
A communications receiver has four filters installed in it, respectively designated as 250 Hz, 500 Hz, 2.4 kHz, and 6 kHz. If you were listening to single sideband, which filter would you utilize?
(a) 250 Hz
(b) 6 kHz
(c) 2.4 kHz
(d) 500 Hz
B-003-010-009
A communications receiver has four filters installed in it, respectively designated as 250 Hz, 500 Hz, 2.4 kHz, and 6 kHz. If you were listening to single sideband, which filter would you utilize?
(c) 2.4 kHz
76
B-003-010-010
A communications receiver has four filters installed in it, respectively designated as 250 Hz, 500 Hz, 2.4 kHz and 6 kHz. You are copying a CW transmission and there is a great deal of interference. Which one of the filters would you choose?
(a) 250 Hz
(b) 500 Hz
(c) 2.4 kHz
(d) 6 kHz
B-003-010-010
A communications receiver has four filters installed in it, respectively designated as 250 Hz, 500 Hz, 2.4 kHz and 6 kHz. You are copying a CW transmission and there is a great deal of interference. Which one of the filters would you choose?
(a) 250 Hz
77
B-003-010-011
Selectivity can be placed in the audio stages of a receiver by the utilization of RC active or passive audio filters. If you were to copy CW, which of the following bandpasses would you choose?
(a) 2100 - 2300 Hz
(b) 750 - 850 Hz
(c) 300 - 2700 Hz
(d) 100 - 1100 Hz
B-003-010-011
Selectivity can be placed in the audio stages of a receiver by the utilization of RC active or passive audio filters. If you were to copy CW, which of the following bandpasses would you choose?
(b) 750 - 850 Hz
78
B-003-011-001
What does chirp mean?
(a) A high-pitched tone which is received along with a CW signal
(b) A slow change in transmitter frequency as the circuit warms up
(c) A small change in a transmitter's frequency each time it is keyed
(d) An overload in a receiver's audio circuit whenever CW is received
B-003-011-001
What does chirp mean?
(c) A small change in a transmitter's frequency each time it is keyed
79
B-003-011-002
What can be done to keep a CW transmitter from chirping?
(a) Keep the power supply voltages very steady under transmit load
(b) Add a key-click filter
(c) Keep the power supply current very steady under transmit load
(d) Add a low pass filter
B-003-011-002
What can be done to keep a CW transmitter from chirping?
(a) Keep the power supply voltages very steady under transmit load
80
B-003-011-003
What circuit has a variable-frequency oscillator connected to a buffer/driver and a power amplifier?
(a) A VFO-controlled CW transmitter
(b) A crystal-controlled AM transmitter
(c) A single-sideband transmitter
(d) A digital radio transmitter
B-003-011-003
What circuit has a variable-frequency oscillator connected to a buffer/driver and a power amplifier?
(a) A VFO-controlled CW transmitter
81
B-003-011-004
What type of modulation system changes the amplitude of an RF wave for the purpose of conveying information?
(a) Phase modulation
(b) Amplitude-rectification modulation
(c) Amplitude modulation
(d) Frequency modulation
B-003-011-004
What type of modulation system changes the amplitude of an RF wave for the purpose of conveying information?
(c) Amplitude modulation
82
B-003-011-005
In what emission type does the instantaneous amplitude (envelope) of the RF signal vary in accordance with the modulating audio?
(a) Amplitude modulation
(b) Frequency modulation
(c) Pulse modulation
(d) Frequency shift keying
B-003-011-005
In what emission type does the instantaneous amplitude (envelope) of the RF signal vary in accordance with the modulating audio?
(a) Amplitude modulation
83
B-003-011-006
Morse code is usually transmitted by radio as:
(a) an interrupted carrier
(b) a series of key-clicks
(c) a continuous carrier
(d) a voice-modulated carrier
B-003-011-006
Morse code is usually transmitted by radio as:
(a) an interrupted carrier
84
B-003-011-007
A mismatched antenna or transmission line may present an incorrect load to the transmitter. The result may be:
(a) loss of modulation in the transmitted signal
(b) full power will not be transferred to the antenna
(c) the driver stage will not deliver power to the final
(d) the output tank circuit breaks down
B-003-011-007
A mismatched antenna or transmission line may present an incorrect load to the transmitter. The result may be:
(b) full power will not be transferred to the antenna
85
B-003-011-008
One result of a slight mismatch between the power amplifier of a transmitter and the antenna would be:
(a) smaller DC current drain
(b) lower modulation percentage
(c) reduced antenna radiation
(d) radiated key-clicks
B-003-011-008
One result of a slight mismatch between the power amplifier of a transmitter and the antenna would be:
(c) reduced antenna radiation
86
B-003-011-009
An RF oscillator should be electrically and mechanically stable. This is to ensure that the oscillator does not:
(a) become over modulated
(b) drift in frequency
(c) generate key-clicks
(d) cause undue distortion
B-003-011-009
An RF oscillator should be electrically and mechanically stable. This is to ensure that the oscillator does not:
(b) drift in frequency
87
B-003-011-010
The input power to the final stage of your transmitter is 200 watts and the output is 125 watts. What has happened to the remaining power?
(a) It has been used to provide greater efficiency
(b) It has been used to provide negative feedback
(c) It has been dissipated as heat loss
(d) It has been used to provide positive feedback
B-003-011-010
The input power to the final stage of your transmitter is 200 watts and the output is 125 watts. What has happened to the remaining power?
(c) It has been dissipated as heat loss
88
B-003-011-011
The difference between DC input power and RF output power of a transmitter RF amplifier:
(a) appears as heat dissipation
(b) is lost in the transmission line
(c) is due to oscillating
(d) radiates from the antenna
B-003-011-011
The difference between DC input power and RF output power of a transmitter RF amplifier:
(a) appears as heat dissipation
89
B-003-012-001
What may happen if an SSB transmitter is operated with the microphone gain set too high?
(a) It may cause splatter interference to other stations operating near its frequency
(b) It may cause interference to other stations operating on a higher frequency band
(c) It may cause atmospheric interference in the air around the antenna
(d) It may cause digital interference to computer equipment
B-003-012-001
What may happen if an SSB transmitter is operated with the microphone gain set too high?
(a) It may cause splatter interference to other stations operating near its frequency
90
B-003-012-002
What may happen if an SSB transmitter is operated with too much speech processing?
(a) It may cause audio distortion or splatter interference to other stations operating near its frequency
(b) It may cause digital interference to computer equipment
(c) It may cause atmospheric interference in the air around the antenna
(d) It may cause interference to other stations operating on a higher frequency band
B-003-012-002
What may happen if an SSB transmitter is operated with too much speech processing?
(a) It may cause audio distortion or splatter interference to other stations operating near its frequency
91
B-003-012-003
What is the term for the average power supplied to an antenna transmission line during one RF cycle, at the crest of the modulation envelope?
(a) Peak output power
(b) Peak envelope power
(c) Average radio-frequency power
(d) Peak transmitter power
B-003-012-003
What is the term for the average power supplied to an antenna transmission line during one RF cycle, at the crest of the modulation envelope?
(b) Peak envelope power
92
B-003-012-004
What is the usual bandwidth of a single-sideband amateur signal?
(a) 1 kHz
(b) 2 kHz
(c) Between 3 and 6 kHz
(d) Between 2 and 3 kHz
B-003-012-004
What is the usual bandwidth of a single-sideband amateur signal?
(d) Between 2 and 3 kHz
93
B-003-012-005
In a typical single-sideband phone transmitter, what circuit processes signals from the balanced modulator and sends signals to the mixer?
(a) Filter
(b) IF amplifier
(c) RF amplifier
(d) Carrier oscillator
B-003-012-005
In a typical single-sideband phone transmitter, what circuit processes signals from the balanced modulator and sends signals to the mixer?
(a) Filter
94
B-003-012-006
What is one advantage of carrier suppression in a double-sideband phone transmission?
(a) Only half the bandwidth is required for the same information content
(b) More power can be put into the sidebands for a given power amplifier capacity
(c) Greater modulation percentage is obtainable with lower distortion
(d) Simpler equipment can be used to receive a double-sideband suppressed-carrier signal
B-003-012-006
What is one advantage of carrier suppression in a double-sideband phone transmission?
(b) More power can be put into the sidebands for a given power amplifier capacity
95
B-003-012-007
What happens to the signal of an overmodulated single-sideband or double-sideband phone transmitter?
(a) It becomes stronger with no other effects
(b) It occupies less bandwidth with poor high-frequency response
(c) It has higher fidelity and improved signal-to-noise ratio
(d) It becomes distorted and occupies more bandwidth
B-003-012-007
What happens to the signal of an overmodulated single-sideband or double-sideband phone transmitter?
(d) It becomes distorted and occupies more bandwidth
96
B-003-012-008
How should the microphone gain control be adjusted on a single-sideband phone transmitter?
(a) For full deflection of the ALC meter on modulation peaks
(b) For 100% frequency deviation on modulation peaks
(c) For a dip in plate current
(d) For slight movement of the ALC meter on modulation peaks
B-003-012-008
How should the microphone gain control be adjusted on a single-sideband phone transmitter?
(d) For slight movement of the ALC meter on modulation peaks
97
B-003-012-009
The purpose of a balanced modulator in an SSB transmitter is to:
(a) suppress the carrier and pass on the two sidebands
(b) make sure that the carrier and both sidebands are 180 degrees out of phase
(c) ensure that the percentage of modulation is kept constant
(d) make sure that the carrier and both sidebands are in phase
B-003-012-009
The purpose of a balanced modulator in an SSB transmitter is to:
(a) suppress the carrier and pass on the two sidebands
98
B-003-012-010
In a SSB transmission, the carrier is:
(a) transmitted with one sideband
(b) reinserted at the receiver
(c) inserted at the transmitter
(d) of no use at the receiver
B-003-012-010
In a SSB transmission, the carrier is:
(b) reinserted at the receiver
99
B-003-012-011
The automatic level control (ALC) in a SSB transmitter:
(a) reduces transmitter audio feedback
(b) increases the occupied bandwidth
(c) reduces the system noise
(d) controls the peak audio input so that the power amplifier is not overdriven
B-003-012-011
The automatic level control (ALC) in a SSB transmitter:
(d) controls the peak audio input so that the power amplifier is not overdriven
100
B-003-013-001
What may happen if an FM transmitter is operated with the microphone gain or deviation control set too high?
(a) It may cause interference to other stations operating near its frequency
(b) It may cause digital interference to computer equipment
(c) It may cause atmospheric interference in the air around the antenna
(d) It may cause interference to other stations operating on a higher frequency band
B-003-013-001
What may happen if an FM transmitter is operated with the microphone gain or deviation control set too high?
(a) It may cause interference to other stations operating near its frequency
101
B-003-013-002
What may your FM hand-held or mobile transceiver do if you shout into its microphone and the deviation adjustment is set too high?
(a) It may cause digital interference to computer equipment
(b) It may cause interference to other stations operating near its frequency
(c) It may cause atmospheric interference in the air around the antenna
(d) It may cause interference to other stations operating on a higher frequency band
B-003-013-002
What may your FM hand-held or mobile transceiver do if you shout into its microphone and the deviation adjustment is set too high?
(b) It may cause interference to other stations operating near its frequency
102
B-003-013-003
What can you do if you are told your FM hand-held or mobile transceiver is overdeviating?
(a) Talk louder into the microphone
(b) Let the transceiver cool off
(c) Change to a higher power level
(d) Talk farther away from the microphone
B-003-013-003
What can you do if you are told your FM hand-held or mobile transceiver is overdeviating?
(d) Talk farther away from the microphone
103
B-003-013-004
What kind of emission would your FM transmitter produce if its microphone failed to work?
(a) A frequency-modulated carrier
(b) An amplitude-modulated carrier
(c) A phase-modulated carrier
(d) An unmodulated carrier
B-003-013-004
What kind of emission would your FM transmitter produce if its microphone failed to work?
(d) An unmodulated carrier
104
B-003-013-005
Why is FM voice best for local VHF/UHF radio communications?
(a) The carrier is not detectable
(b) It is more resistant to distortion caused by reflected signals
(c) It provides good signal plus noise to noise ratio at low RF signal levels
(d) Its RF carrier stays on frequency better than the AM modes
B-003-013-005
Why is FM voice best for local VHF/UHF radio communications?
(c) It provides good signal plus noise to noise ratio at low RF signal levels
105
B-003-013-006
What is the usual bandwidth of a frequency-modulated amateur signal for +/- 5kHz deviation?
(a) Less than 5 kHz
(b) Between 10 and 20 kHz
(c) Between 5 and 10 kHz
(d) Greater than 20 kHz
B-003-013-006
What is the usual bandwidth of a frequency-modulated amateur signal for +/- 5kHz deviation?
(b) Between 10 and 20 kHz
106
B-003-013-007
What is the result of overdeviation in an FM transmitter?
(a) Increased transmitter power
(b) Increased transmitter range
(c) Poor carrier suppression
(d) Out-of-channel emissions
B-003-013-007
What is the result of overdeviation in an FM transmitter?
(d) Out-of-channel emissions
107
B-003-013-008
What emission is produced by a reactance modulator connected to an RF power amplifier?
(a) Multiplex modulation
(b) Amplitude modulation
(c) Phase modulation
(d) Pulse modulation
B-003-013-008
What emission is produced by a reactance modulator connected to an RF power amplifier?
(c) Phase modulation
108
B-003-013-009
Why isn't frequency modulated (FM) phone used below 28.0 MHz?
(a) The transmitter efficiency for this mode is low
(b) The bandwidth would exceed limits in the Regulations
(c) Harmonics could not be attenuated to practical levels
(d) The frequency stability would not be adequate
B-003-013-009
Why isn't frequency modulated (FM) phone used below 28.0 MHz?
(b) The bandwidth would exceed limits in the Regulations
109
B-003-013-010
You are transmitting FM on the 2 metre band. Several stations advise you that your transmission is loud and distorted. A quick check with a frequency counter tells you that the transmitter is on the proper frequency. Which of the following is the most probable cause of the distortion?
(a) The power supply output voltage is low
(b) The frequency deviation of your transmitter is set too high
(c) The repeater is reversing your sidebands
(d) The frequency counter is giving an incorrect reading and you are indeed off frequency
B-003-013-010
You are transmitting FM on the 2 metre band. Several stations advise you that your transmission is loud and distorted. A quick check with a frequency counter tells you that the transmitter is on the proper frequency. Which of the following is the most probable cause of the distortion?
(b) The frequency deviation of your transmitter is set too high
110
B-003-013-011
FM receivers perform in an unusual manner when two or more stations are present. The strongest signal, even though it is only two or three times stronger than the other signals, will be the only transmission demodulated. This is called:
(a) attach effect
(b) interference effect
(c) surrender effect
(d) capture effect
B-003-013-011
FM receivers perform in an unusual manner when two or more stations are present. The strongest signal, even though it is only two or three times stronger than the other signals, will be the only transmission demodulated. This is called:
(d) capture effect
111
B-003-014-001
What do many amateurs use to help form good Morse code characters?
(a) A key-operated on/off switch
(b) A notch filter
(c) An electronic keyer
(d) A DTMF keypad
B-003-014-001
What do many amateurs use to help form good Morse code characters?
(c) An electronic keyer
112
B-003-014-002
Where would you connect a microphone for voice operation?
(a) To a power supply
(b) To a transceiver
(c) To an antenna switch
(d) To an antenna
B-003-014-002
Where would you connect a microphone for voice operation?
(b) To a transceiver
113
B-003-014-003
What would you connect to a transceiver for voice operation?
(a) A receiver audio filter
(b) A terminal-voice controller
(c) A splatter filter
(d) A microphone
B-003-014-003
What would you connect to a transceiver for voice operation?
(d) A microphone
114
B-003-014-004
Why might a dummy antenna get warm when in use?
(a) Because it absorbs static electricity
(b) Because it stores radio waves
(c) Because it changes RF energy into heat
(d) Because it stores electric current
B-003-014-004
Why might a dummy antenna get warm when in use?
(c) Because it changes RF energy into heat
115
B-003-014-005
What is the circuit called which causes a transmitter to automatically transmit when an operator speaks into its microphone?
(a) VXO
(b) VCO
(c) VFO
(d) VOX
B-003-014-005
What is the circuit called which causes a transmitter to automatically transmit when an operator speaks into its microphone?
(d) VOX
116
B-003-014-006
What is the reason for using a properly adjusted speech processor with a single-sideband phone transmitter?
(a) It reduces average transmitter power requirements
(b) It improves signal intelligibility at the receiver
(c) It reduces unwanted noise pickup from the microphone
(d) It improves voice frequency fidelity
B-003-014-006
What is the reason for using a properly adjusted speech processor with a single-sideband phone transmitter?
(b) It improves signal intelligibility at the receiver
117
B-003-014-007
If a single-sideband phone transmitter is 100% modulated, what will a speech processor do to the transmitter's power?
(a) It will increase the output PEP
(b) It will decrease the peak power output
(c) It will add nothing to the output Peak Envelope Power (PEP)
(d) It will decrease the average power output
B-003-014-007
If a single-sideband phone transmitter is 100% modulated, what will a speech processor do to the transmitter's power?
(c) It will add nothing to the output Peak Envelope Power (PEP)
118
B-003-014-008
When switching from receive to transmit:
(a) the transmit oscillator should be turned off
(b) the receiving antenna should be connected
(c) the power supply should be off
(d) the receiver should be muted
B-003-014-008
When switching from receive to transmit:
(d) the receiver should be muted
119
B-003-014-009
A switching system to enable the use of one antenna for a transmitter and receiver should also:
(a) ground the antenna on receive
(b) switch between meters
(c) disconnect the antenna tuner
(d) disable the unit not being used
B-003-014-009
A switching system to enable the use of one antenna for a transmitter and receiver should also:
(d) disable the unit not being used
120
B-003-014-010
An antenna changeover switch in a transmitter-receiver combination is necessary:
(a) to change antennas for operation on other frequencies
(b) to prevent RF currents entering the receiver circuits
(c) to allow more than one transmitter to be used
(d) so that one antenna can be used for transmitter and receiver
B-003-014-010
An antenna changeover switch in a transmitter-receiver combination is necessary:
(d) so that one antenna can be used for transmitter and receiver
121
B-003-014-011
Which of the following components could be used as a dynamic microphone?
(a) Crystal earpiece
(b) Resistor
(c) Capacitor
(d) Loudspeaker
B-003-014-011
Which of the following components could be used as a dynamic microphone?
(d) Loudspeaker
122
B-003-015-001
What does "connected" mean in an AX.25 packet-radio link?
(a) A telephone link is working between two stations
(b) A message has reached an amateur station for local delivery
(c) A transmitting and receiving station are using a digipeater, so no other contacts can take place until they are finished
(d) A transmitting station is sending data to only one receiving station, it replies that the data is being received correctly
B-003-015-001
What does "connected" mean in an AX.25 packet-radio link?
(d) A transmitting station is sending data to only one receiving station, it replies that the data is being received correctly
123
B-003-015-002
What does "monitoring" mean on a packet-radio frequency?
(a) A member of the Amateur Auxiliary is copying all messages
(b) A receiving station is displaying messages that may not be sent to it, and is not replying to any message
(c) A receiving station is displaying all messages sent to it, and replying that the messages are being received correctly
(d) Innovation, Science and Economic Development Canada is monitoring all messages
B-003-015-002
What does "monitoring" mean on a packet-radio frequency?
(b) A receiving station is displaying messages that may not be sent to it, and is not replying to any message
124
B-003-015-003
What is a digipeater?
(a) A station that retransmits only data that is marked to be retransmitted
(b) A repeater built using only digital electronics parts
(c) A repeater that changes audio signals to digital data
(d) A station that retransmits any data that it receives
B-003-015-003
What is a digipeater?
(a) A station that retransmits only data that is marked to be retransmitted
125
B-003-015-004
What does "network" mean in packet radio?
(a) A way of connecting terminal-node controllers by telephone so data can be sent over long distances
(b) The connections on terminal-node controllers
(c) The programming in a terminal-node controller that rejects other callers if a station is already connected
(d) A way of connecting packet-radio stations so data can be sent over long distances
B-003-015-004
What does "network" mean in packet radio?
(d) A way of connecting packet-radio stations so data can be sent over long distances
126
B-003-015-005
In AX.25 packet-radio operation, what equipment connects to a terminal-node controller?
(a) A transceiver and a modem
(b) A transceiver, a computer and possibly a GPS receiver
(c) A DTMF keypad, a monitor and a transceiver
(d) A DTMF microphone, a monitor and a transceiver
B-003-015-005
In AX.25 packet-radio operation, what equipment connects to a terminal-node controller?
(b) A transceiver, a computer and possibly a GPS receiver
127
B-003-015-006
How would you modulate a 2 meter FM transceiver to produce packet-radio emissions?
(a) Connect a terminal-node controller to interrupt the transceiver's carrier wave
(b) Connect a keyboard to the transceiver's microphone input
(c) Connect a DTMF key pad to the transceiver's microphone input
(d) Connect a terminal-node controller to the transceiver's microphone input
B-003-015-006
How would you modulate a 2 meter FM transceiver to produce packet-radio emissions?
(d) Connect a terminal-node controller to the transceiver's microphone input
128
B-003-015-007
When selecting a RTTY transmitting frequency, what minimum frequency separation from a contact in progress should you allow (center to center) to minimize interference?
(a) Approximately 6 kHz
(b) Approximately 3 kHz
(c) 250 to 500 Hz
(d) 60 Hz
B-003-015-007
When selecting a RTTY transmitting frequency, what minimum frequency separation from a contact in progress should you allow (center to center) to minimize interference?
(c) 250 to 500 Hz
129
B-003-015-008
Digital transmissions use signals called __________ to transmit the states 1 and 0:
(a) packet and AMTOR
(b) Baudot and ASCII
(c) dot and dash
(d) mark and space
B-003-015-008
Digital transmissions use signals called __________ to transmit the states 1 and 0:
(d) mark and space
130
B-003-015-009
Which of the following terms does not apply to packet radio?
(a) Baudot
(b) ASCII
(c) Automatic Packet Reporting System (APRS)
(d) AX.25
B-003-015-009
Which of the following terms does not apply to packet radio?
(a) Baudot
131
B-003-015-010
When using AMTOR transmissions, there are two modes that may be utilized. Mode A uses Automatic Repeat Request (ARQ) protocol and is normally used:
(a) for communications after contact has been established
(b) at all times. Mode B is for test purposes only
(c) only when communications have been completed
(d) when making a general call
B-003-015-010
When using AMTOR transmissions, there are two modes that may be utilized. Mode A uses Automatic Repeat Request (ARQ) protocol and is normally used:
(a) for communications after contact has been established
132
B-003-015-011
With a digital communication mode based on a computer sound card, what is the result of feeding too much audio in the transceiver?
(a) Splatter or out-of-channel emissions
(b) Higher signal-to-noise ratio
(c) Lower error rate
(d) Power amplifier overheating
B-003-015-011
With a digital communication mode based on a computer sound card, what is the result of feeding too much audio in the transceiver?
(a) Splatter or out-of-channel emissions
133
B-003-016-001
How much voltage does a standard automobile battery usually supply?
(a) About 240 volts
(b) About 120 volts
(c) About 12 volts
(d) About 9 volts
B-003-016-001
How much voltage does a standard automobile battery usually supply?
(c) About 12 volts
134
B-003-016-002
Which component has a positive and a negative side?
(a) A potentiometer
(b) A battery
(c) A fuse
(d) A resistor
B-003-016-002
Which component has a positive and a negative side?
(b) A battery
135
B-003-016-003
A cell, that can be repeatedly recharged by supplying it with electrical energy, is known as a:
(a) low leakage cell
(b) storage cell
(c) memory cell
(d) primary cell
B-003-016-003
A cell, that can be repeatedly recharged by supplying it with electrical energy, is known as a:
(b) storage cell
136
B-003-016-004
Which of the following is a source of electromotive force (EMF)?
(a) germanium diode
(b) P channel FET
(c) carbon resistor
(d) lithium-ion battery
B-003-016-004
Which of the following is a source of electromotive force (EMF)?
(d) lithium-ion battery
137
B-003-016-005
An important difference between a conventional flashlight battery and a lead acid battery is that only the lead acid battery:
(a) has two terminals
(b) can be completely discharged
(c) can be repeatedly recharged
(d) contains an electrolyte
B-003-016-005
An important difference between a conventional flashlight battery and a lead acid battery is that only the lead acid battery:
(c) can be repeatedly recharged
138
B-003-016-006
An alkaline cell has a nominal voltage of 1.5 volts. When supplying a great deal of current, the voltage may drop to 1.2 volts. This is caused by the cell's:
(a) electrolyte becoming dry
(b) current capacity
(c) voltage capacity
(d) internal resistance
B-003-016-006
An alkaline cell has a nominal voltage of 1.5 volts. When supplying a great deal of current, the voltage may drop to 1.2 volts. This is caused by the cell's:
(d) internal resistance
139
B-003-016-007
An inexpensive primary cell in use today is the carbon-zinc or flashlight cell. This type of cell can be recharged:
(a) twice
(b) many times
(c) once
(d) never
B-003-016-007
An inexpensive primary cell in use today is the carbon-zinc or flashlight cell. This type of cell can be recharged:
(d) never
140
B-003-016-008
Battery capacity is commonly stated as a value of current delivered over a specified period of time. What is the effect of exceeding that specified current?
(a) The internal resistance of the cell is short-circuited
(b) The battery will accept the subsequent charge in shorter time
(c) The voltage delivered will be higher
(d) A battery charge will not last as long
B-003-016-008
Battery capacity is commonly stated as a value of current delivered over a specified period of time. What is the effect of exceeding that specified current?
(d) A battery charge will not last as long
141
B-003-016-009
To increase the current capacity of a cell, several cells should be connected in:
(a) parallel
(b) series
(c) parallel resonant
(d) series resonant
B-003-016-009
To increase the current capacity of a cell, several cells should be connected in:
(a) parallel
142
B-003-016-010
To increase the voltage output, several cells are connected in:
(a) series
(b) parallel
(c) series-parallel
(d) resonance
B-003-016-010
To increase the voltage output, several cells are connected in:
(a) series
143
B-003-016-011
A lithium-ion battery should never be:
(a) recharged
(b) left disconnected
(c) left overnight at room temperature
(d) short-circuited
B-003-016-011
A lithium-ion battery should never be:
(d) short-circuited
144
B-003-017-001
If your mobile transceiver works in your car but not in your home, what should you check first?
(a) The power supply
(b) The speaker
(c) The microphone
(d) The SWR meter
B-003-017-001
If your mobile transceiver works in your car but not in your home, what should you check first?
(a) The power supply
145
B-003-017-002
What device converts household current to 12 volts DC?
(a) A low pass filter
(b) A power supply
(c) An RS-232 interface
(d) A catalytic converter
B-003-017-002
What device converts household current to 12 volts DC?
(b) A power supply
146
B-003-017-003
Which of these usually needs a high current capacity power supply?
(a) An antenna switch
(b) A transceiver
(c) A receiver
(d) An SWR meter
B-003-017-003
Which of these usually needs a high current capacity power supply?
(b) A transceiver
147
B-003-017-004
What may cause a buzzing or hum in the signal of an AC-powered transmitter?
(a) A bad filter capacitor in the transmitter's power supply
(b) Using an antenna which is the wrong length
(c) Energy from another transmitter
(d) Bad design of the transmitter's RF power output circuit
B-003-017-004
What may cause a buzzing or hum in the signal of an AC-powered transmitter?
(a) A bad filter capacitor in the transmitter's power supply
148
B-003-017-005
A power supply is to supply DC at 12 volts at 5 amperes. The power transformer should be rated higher than:
(a) 17 watts
(b) 60 watts
(c) 2.4 watts
(d) 6 watts
B-003-017-005
A power supply is to supply DC at 12 volts at 5 amperes. The power transformer should be rated higher than:
(b) 60 watts
149
B-003-017-006
The diode is an important part of a simple power supply. It converts AC to DC, since it:
(a) has a high resistance to AC but not to DC
(b) allows electrons to flow in only one direction from cathode to anode
(c) has a high resistance to DC but not to AC
(d) allows electrons to flow in only one direction from anode to cathode
B-003-017-006
The diode is an important part of a simple power supply. It converts AC to DC, since it:
(b) allows electrons to flow in only one direction from cathode to anode
150
B-003-017-007
To convert AC to pulsating DC, you could use a:
(a) transformer
(b) capacitor
(c) resistor
(d) diode
B-003-017-007
To convert AC to pulsating DC, you could use a:
(d) diode
151
B-003-017-008
Power-line voltages have been made standard over the years and the voltages generally supplied to homes are approximately:
(a) 110 and 220 volts
(b) 100 and 200 volts
(c) 130 and 260 volts
(d) 120 and 240 volts
B-003-017-008
Power-line voltages have been made standard over the years and the voltages generally supplied to homes are approximately:
(d) 120 and 240 volts
152
B-003-017-009
Your mobile HF transceiver draws 22 amperes on transmit. The manufacturer suggests limiting voltage drop to 0.5 volt and the vehicle battery is 3 metres (10 feet) away. Given the losses below at that current, which minimum wire gauge must you use?
(a) Number 14, 0.19 V per metre (0.06 V per foot)
(b) Number 12, 0.11 V per metre (0.03 V per foot)
(c) Number 8, 0.05 V per metre (0.01 V per foot)
(d) Number 10, 0.07 V per metre (0.02 V per foot)
B-003-017-009
Your mobile HF transceiver draws 22 amperes on transmit. The manufacturer suggests limiting voltage drop to 0.5 volt and the vehicle battery is 3 metres (10 feet) away. Given the losses below at that current, which minimum wire gauge must you use?
(d) Number 10, 0.07 V per metre (0.02 V per foot)
153
B-003-017-010
Why are fuses needed as close as possible to the vehicle battery when wiring a transceiver directly to the battery?
(a) To prevent interference to the vehicle's electronic systems
(b) To reduce the voltage drop in the radio's DC supply
(c) To prevent an overcurrent situation from starting a fire
(d) To protect the radio from transient voltages
B-003-017-010
Why are fuses needed as close as possible to the vehicle battery when wiring a transceiver directly to the battery?
(c) To prevent an overcurrent situation from starting a fire
154
B-003-017-011
You have a very loud low-frequency hum appearing on your transmission. In what part of the transmitter would you first look for the trouble?
(a) The variable-frequency oscillator
(b) The driver circuit
(c) The power amplifier circuit
(d) The power supply
B-003-017-011
You have a very loud low-frequency hum appearing on your transmission. In what part of the transmitter would you first look for the trouble?
(d) The power supply
155
B-003-018-001
How could you best keep unauthorized persons from using your amateur station at home?
(a) Use a carrier-operated relay in the main power line
(b) Put a "Danger - High Voltage" sign in the station
(c) Use a key-operated on/off switch in the main power line
(d) Put fuses in the main power line
B-003-018-001
How could you best keep unauthorized persons from using your amateur station at home?
(c) Use a key-operated on/off switch in the main power line
156
B-003-018-002
How could you best keep unauthorized persons from using a mobile amateur station in your car?
(a) Tune the radio to an unused frequency when you are done using it
(b) Turn the radio off when you are not using it
(c) Disconnect the microphone when you are not using it
(d) Put a "Do not touch" sign on the radio
B-003-018-002
How could you best keep unauthorized persons from using a mobile amateur station in your car?
(c) Disconnect the microphone when you are not using it
157
B-003-018-003
Why would you use a key-operated on/off switch in the main power line of your station?
(a) To keep unauthorized persons from using your station
(b) For safety, in case the main fuses fail
(c) To keep the power company from turning off your electricity during an emergency
(d) For safety, to turn off the station in the event of an emergency
B-003-018-003
Why would you use a key-operated on/off switch in the main power line of your station?
(a) To keep unauthorized persons from using your station
158
B-003-018-004
Why would there be a switch in a high-voltage power supply to turn off the power if its cabinet is opened?
(a) To keep dangerous RF radiation from leaking out through an open cabinet
(b) To keep anyone opening the cabinet from getting shocked by dangerous high voltages
(c) To keep dangerous RF radiation from coming in through an open cabinet
(d) To turn the power supply off when it is not being used
B-003-018-004
Why would there be a switch in a high-voltage power supply to turn off the power if its cabinet is opened?
(b) To keep anyone opening the cabinet from getting shocked by dangerous high voltages
159
B-003-018-005
How little electrical current flowing through the human body can be fatal?
(a) Approximately 10 amperes
(b) As little as 20 milliamperes
(c) More than 20 amperes
(d) Current flow through the human body is never fatal
B-003-018-005
How little electrical current flowing through the human body can be fatal?
(b) As little as 20 milliamperes
160
B-003-018-006
Which body organ can be fatally affected by a very small amount of electrical current?
(a) The heart
(b) The brain
(c) The liver
(d) The lungs
B-003-018-006
Which body organ can be fatally affected by a very small amount of electrical current?
(a) The heart
161
B-003-018-007
What is the minimum voltage which is usually dangerous to humans?
(a) 30 volts
(b) 100 volts
(c) 1000 volts
(d) 2000 volts
B-003-018-007
What is the minimum voltage which is usually dangerous to humans?
(a) 30 volts
162
B-003-018-008
What should you do if you discover someone who is being burned by high voltage?
(a) Wait for a few minutes to see if the person can get away from the high voltage on their own, then try to help
(b) Immediately drag the person away from the high voltage
(c) Turn off the power, call for emergency help and provide first-aid if needed
(d) Run from the area so you won't be burned too
B-003-018-008
What should you do if you discover someone who is being burned by high voltage?
(c) Turn off the power, call for emergency help and provide first-aid if needed
163
B-003-018-009
What is the safest method to remove an unconscious person from contact with a high voltage source?
(a) Wrap the person in a blanket and pull him to a safe area
(b) Call an electrician
(c) Turn off the high voltage switch before removing the person from contact with the source
(d) Remove the person by pulling an arm or a leg
B-003-018-009
What is the safest method to remove an unconscious person from contact with a high voltage source?
(c) Turn off the high voltage switch before removing the person from contact with the source
164
B-003-018-010
Before checking a fault in a mains operated power supply unit, it would be safest to first:
(a) short out leads of filter capacitor
(b) turn off the power and remove power plug
(c) check action of capacitor bleeder resistance
(d) remove and check fuse from power supply
B-003-018-010
Before checking a fault in a mains operated power supply unit, it would be safest to first:
(b) turn off the power and remove power plug
165
B-003-018-011
Fault finding in a power supply of an amateur transmitter while the supply is operating is not a recommended technique because of the risk of:
(a) damaging the transmitter
(b) overmodulation
(c) electric shock
(d) blowing the fuse
B-003-018-011
Fault finding in a power supply of an amateur transmitter while the supply is operating is not a recommended technique because of the risk of:
(c) electric shock
166
B-003-019-001
For best protection from electrical shock, what should be grounded in an amateur station?
(a) The antenna transmission line
(b) The AC power line
(c) The power supply primary
(d) All station equipment
B-003-019-001
For best protection from electrical shock, what should be grounded in an amateur station?
(d) All station equipment
167
B-003-019-002
If a separate ground system is not possible for your amateur station, an alternative indoor grounding point could be:
(a) a metallic cold water pipe
(b) a plastic cold water pipe
(c) a window screen
(d) a metallic natural gas pipe
B-003-019-002
If a separate ground system is not possible for your amateur station, an alternative indoor grounding point could be:
(a) a metallic cold water pipe
168
B-003-019-003
To protect you against electrical shock, the chassis of each piece of your station equipment should be connected to:
(a) a dummy load
(b) insulated shock mounts
(c) the antenna
(d) a good ground connection
B-003-019-003
To protect you against electrical shock, the chassis of each piece of your station equipment should be connected to:
(d) a good ground connection
169
B-003-019-004
Which of these materials is best for a ground rod driven into the earth?
(a) Hard plastic
(b) Copper-clad steel
(c) Iron or steel
(d) Fiberglass
B-003-019-004
Which of these materials is best for a ground rod driven into the earth?
(b) Copper-clad steel
170
B-003-019-005
If you ground your station equipment to a ground rod driven into the earth, what is the shortest length the rod should be?
(a) 1.2 metre (4 ft)
(b) 2.5 metres (8 ft)
(c) 3 metres (10 ft)
(d) The station ground system must conform to applicable electrical code requirements
B-003-019-005
If you ground your station equipment to a ground rod driven into the earth, what is the shortest length the rod should be?
(d) The station ground system must conform to applicable electrical code requirements
171
B-003-019-006
Where should the green wire in a three-wire AC line cord be connected in a power supply?
(a) To the white wire
(b) To the chassis
(c) To the "hot" side of the power switch
(d) To the fuse
B-003-019-006
Where should the green wire in a three-wire AC line cord be connected in a power supply?
(b) To the chassis
172
B-003-019-007
If your third-floor amateur station has a ground wire running 10 metres (33 feet) down to a ground rod, why might you get an RF burn if you touch the front panel of your HF transceiver?
(a) Because of a bad antenna connection, allowing the RF energy to take an easier path out of the transceiver through you
(b) Because the ground wire has significant reactance and acts more like an antenna than an RF ground connection
(c) Because the transceiver's heat-sensing circuit is not working to start the cooling fan
(d) Because the ground rod is not making good contact with moist earth
B-003-019-007
If your third-floor amateur station has a ground wire running 10 metres (33 feet) down to a ground rod, why might you get an RF burn if you touch the front panel of your HF transceiver?
(b) Because the ground wire has significant reactance and acts more like an antenna than an RF ground connection
173
B-003-019-008
What is one good way to avoid stray RF energy in your amateur station?
(a) Make a couple of loops in the ground wire where it connects to your station
(b) Keep the station's ground wire as short as possible
(c) Drive the ground rod at least 4m (14 feet) into the ground
(d) Use a beryllium ground wire for best conductivity
B-003-019-008
What is one good way to avoid stray RF energy in your amateur station?
(b) Keep the station's ground wire as short as possible
174
B-003-019-009
Which statement about station grounding is true?
(a) RF hot spots can occur in a station located above the ground floor if the equipment is grounded by a long ground wire
(b) A ground loop is an effective way to ground station equipment
(c) If the chassis of all station equipment is connected with a good conductor, there is no need to tie them to an earth ground
(d) The chassis of each piece of station equipment should be tied together with high-impedance conductors
B-003-019-009
Which statement about station grounding is true?
(a) RF hot spots can occur in a station located above the ground floor if the equipment is grounded by a long ground wire
175
B-003-019-010
On mains operated power supplies, the ground wire should be connected to the metal chassis of the power supply. This ensures, in case there is a fault in the power supply, that the chassis:
(a) does not become conductive to prevent electric shock
(b) becomes conductive to prevent electric shock
(c) does not develop a high voltage with respect to the ground
(d) develops a high voltage compared to the ground
B-003-019-010
On mains operated power supplies, the ground wire should be connected to the metal chassis of the power supply. This ensures, in case there is a fault in the power supply, that the chassis:
(c) does not develop a high voltage with respect to the ground
176
B-003-019-011
The purpose of using a three-wire power cord and plug on amateur radio equipment is to:
(a) prevent the plug from being reversed in the wall outlet
(b) prevent internal short circuits
(c) prevent the chassis from becoming live
(d) make it inconvenient to use
B-003-019-011
The purpose of using a three-wire power cord and plug on amateur radio equipment is to:
(c) prevent the chassis from becoming live
177
B-003-020-001
Why should you ground all antenna and rotator cables when your amateur station is not in use?
(a) To lock the antenna system in one position
(b) To avoid radio frequency interference
(c) To help protect the station equipment and building from lightning damage
(d) To make sure everything will stay in place
B-003-020-001
Why should you ground all antenna and rotator cables when your amateur station is not in use?
(c) To help protect the station equipment and building from lightning damage
178
B-003-020-002
You want to install a lightning arrestor on your antenna transmission line, where should it be inserted?
(a) Close to the antenna
(b) Behind the transceiver
(c) Outside, as close to earth grounding as possible
(d) Anywhere on the line
B-003-020-002
You want to install a lightning arrestor on your antenna transmission line, where should it be inserted?
(c) Outside, as close to earth grounding as possible
179
B-003-020-003
How can amateur station equipment best be protected from lightning damage?
(a) Use heavy insulation on the wiring
(b) Never turn off the equipment
(c) Disconnect all equipment from the power lines and antenna cables
(d) Disconnect the ground system from all radios
B-003-020-003
How can amateur station equipment best be protected from lightning damage?
(c) Disconnect all equipment from the power lines and antenna cables
180
B-003-020-004
What equipment should be worn for working on an antenna tower?
(a) A reflective vest of approved colour
(b) A flashing red, yellow or white light
(c) Approved equipment in accordance with applicable standards concerning fall protection
(d) A grounding chain
B-003-020-004
What equipment should be worn for working on an antenna tower?
(c) Approved equipment in accordance with applicable standards concerning fall protection
181
B-003-020-005
Why should you wear approved fall arrest equipment if you are working on an antenna tower?
(a) To safely bring any tools you might use up and down the tower
(b) To keep the tower from becoming unbalanced while you are working
(c) To prevent you from accidentally falling
(d) To safely hold your tools so they don't fall and injure someone on the ground
B-003-020-005
Why should you wear approved fall arrest equipment if you are working on an antenna tower?
(c) To prevent you from accidentally falling
182
B-003-020-006
For safety, how high should you place a horizontal wire antenna?
(a) Above high-voltage electrical lines
(b) Just high enough so you can easily reach it for adjustments or repairs
(c) High enough so that no one can touch any part of it from the ground
(d) As close to the ground as possible
B-003-020-006
For safety, how high should you place a horizontal wire antenna?
(c) High enough so that no one can touch any part of it from the ground
183
B-003-020-007
Why should you wear a hard hat if you are on the ground helping someone work on an antenna tower?
(a) So you won't be hurt if the tower should accidentally fall
(b) To keep RF energy away from your head during antenna testing
(c) So someone passing by will know that work is being done on the tower and will stay away
(d) To protect your head from something dropped from the tower
B-003-020-007
Why should you wear a hard hat if you are on the ground helping someone work on an antenna tower?
(d) To protect your head from something dropped from the tower
184
B-003-020-008
Why should your outside antennas be high enough so that no one can touch them while you are transmitting?
(a) Touching the antenna might reflect the signal back to the transmitter and cause damage
(b) Touching the antenna might radiate harmonics
(c) Touching the antenna might cause RF burns
(d) Touching the antenna might cause television interference
B-003-020-008
Why should your outside antennas be high enough so that no one can touch them while you are transmitting?
(c) Touching the antenna might cause RF burns
185
B-003-020-009
Why should you make sure that no one can touch an open wire transmission line while you are transmitting with it?
(a) Because contact might break the transmission line
(b) Because high-voltage radio energy might burn the person
(c) Because contact might cause spurious emissions
(d) Because contact might cause a short circuit and damage the transmitter
B-003-020-009
Why should you make sure that no one can touch an open wire transmission line while you are transmitting with it?
(b) Because high-voltage radio energy might burn the person
186
B-003-020-010
What safety precautions should you take before beginning repairs on an antenna?
(a) Be sure you and the antenna structure are grounded
(b) Inform your neighbours so they are aware of your intentions
(c) Be sure to turn off the transmitter and disconnect the transmission line
(d) Turn off the main power switch in your house
B-003-020-010
What safety precautions should you take before beginning repairs on an antenna?
(c) Be sure to turn off the transmitter and disconnect the transmission line
187
B-003-020-011
What precaution should you take when installing a ground-mounted antenna?
(a) It should be painted so people or animals do not accidentally run into it
(b) It should be installed so no one can come in contact with it
(c) It should not be installed in a wet area
(d) It should not be installed higher than you can reach
B-003-020-011
What precaution should you take when installing a ground-mounted antenna?
(b) It should be installed so no one can come in contact with it
188
B-003-021-001
What should you do for safety when operating at UHF and microwave frequencies?
(a) Keep antenna away from your eyes when RF is applied
(b) Make sure that an RF leakage filter is installed at the antenna feed point
(c) Make sure the standing wave ratio is low before you conduct a test
(d) Never use a horizontally polarized antenna
B-003-021-001
What should you do for safety when operating at UHF and microwave frequencies?
(a) Keep antenna away from your eyes when RF is applied
189
B-003-021-002
What should you do for safety if you put up a UHF transmitting antenna?
(a) Make sure the antenna is near the ground to keep its RF energy pointing in the correct direction
(b) Make sure you connect an RF leakage filter at the antenna feed point
(c) Make sure that RF field screens are in place
(d) Make sure the antenna will be in a place where no one can get near it when you are transmitting
B-003-021-002
What should you do for safety if you put up a UHF transmitting antenna?
(d) Make sure the antenna will be in a place where no one can get near it when you are transmitting
190
B-003-021-003
What should you do for safety, before removing the shielding on a UHF power amplifier?
(a) Make sure that RF leakage filters are connected
(b) Make sure the amplifier cannot accidentally be turned on
(c) Make sure the antenna transmission line is properly grounded
(d) Make sure all RF screens are in place at the antenna transmission line
B-003-021-003
What should you do for safety, before removing the shielding on a UHF power amplifier?
(b) Make sure the amplifier cannot accidentally be turned on
191
B-003-021-004
Why should you make sure the antenna of a hand-held transceiver is not close to your head when transmitting?
(a) To use your body to reflect the signal in one direction
(b) To reduce your exposure to the radio-frequency energy
(c) To keep static charges from building up
(d) To help the antenna radiate energy equally in all directions
B-003-021-004
Why should you make sure the antenna of a hand-held transceiver is not close to your head when transmitting?
(b) To reduce your exposure to the radio-frequency energy
192
B-003-021-005
How should you position the antenna of a hand-held transceiver while you are transmitting?
(a) Pointed towards the station you are contacting
(b) Away from your head and away from others
(c) Pointed away from the station you are contacting
(d) Pointed down to bounce the signal off the ground
B-003-021-005
How should you position the antenna of a hand-held transceiver while you are transmitting?
(b) Away from your head and away from others
193
B-003-021-006
How can exposure to a large amount of RF energy affect body tissue?
(a) It lowers blood pressure
(b) It paralyzes the tissue
(c) It causes hair to fall out
(d) It heats the tissue
B-003-021-006
How can exposure to a large amount of RF energy affect body tissue?
(d) It heats the tissue
194
B-003-021-007
Which body organ is the most likely to be damaged from the heating effects of RF radiation?
(a) Eyes
(b) Heart
(c) Liver
(d) Hands
B-003-021-007
Which body organ is the most likely to be damaged from the heating effects of RF radiation?
(a) Eyes
195
B-003-021-008
Depending on the wavelength of the signal, the energy density of the RF field, and other factors, in what way can RF energy affect body tissue?
(a) It causes ionizing radiation poisoning
(b) It causes blood flow to stop
(c) It heats the tissue
(d) It has no effect on the body
B-003-021-008
Depending on the wavelength of the signal, the energy density of the RF field, and other factors, in what way can RF energy affect body tissue?
(c) It heats the tissue
196
B-003-021-009
If you operate your amateur station with indoor antennas, what precautions should you take when you install them?
(a) Locate the antennas as far away as possible from living spaces that will be occupied while you are operating
(b) Position the antennas parallel to electrical power wires to take advantage of parasitic effects
(c) Position the antennas along the edge of a wall where it meets the floor or ceiling to reduce parasitic radiation
(d) Locate the antennas close to your operating position to minimize transmission line length
B-003-021-009
If you operate your amateur station with indoor antennas, what precautions should you take when you install them?
(a) Locate the antennas as far away as possible from living spaces that will be occupied while you are operating
197
B-003-021-010
Why should directional high-gain antennas be mounted higher than nearby structures?
(a) So they will be dried by the wind after a heavy rain storm
(b) So they will not damage nearby structures with RF energy
(c) So they will receive more sky waves and fewer ground waves
(d) So they will not direct RF energy toward people in nearby structures
B-003-021-010
Why should directional high-gain antennas be mounted higher than nearby structures?
(d) So they will not direct RF energy toward people in nearby structures
198
B-003-021-011
For best RF safety, where should the ends and center of a dipole antenna be located?
(a) Near or over moist ground so RF energy will be radiated away from the ground
(b) As close to the transmitter as possible so RF energy will be concentrated near the transmitter
(c) Close to the ground so simple adjustments can be easily made without climbing a ladder
(d) As high as possible to prevent people from coming in contact with the antenna
B-003-021-011
For best RF safety, where should the ends and center of a dipole antenna be located?
(d) As high as possible to prevent people from coming in contact with the antenna
