Ham Tech Class - Set 7

Question 1

Which term describes the ability of a receiver to detect the presence of a signal?

Answer 1

B. Sensitivity - T7A01 (B)

Question 2

What is a transceiver?

Answer 2

B. A unit combining the functions of a transmitter and a receiver - T7A02 (B)

Question 3

Which of the following is used to convert a radio signal from one frequency to another?

Answer 3

B. Mixer - T7A03 (B)

Question 4

Which term describes the ability of a receiver to discriminate between multiple signals?

Answer 4

C. Selectivity - T7A04 (C)

Question 5

What is the name of a circuit that generates a signal at a specific frequency?

Answer 5

D. Oscillator - T7A05 (D)

Question 6

What device converts the RF input and output of a transceiver to another band?

Answer 6

C. Transverter - T7A06 (C)

Question 7

What is meant by “PTT”?

Answer 7

D. The push-to-talk function that switches between receive and transmit - T7A07 (D)

Question 8

Which of the following describes combining speech with an RF carrier signal?

Answer 8

C. Modulation - T7A08 (C)

Question 9

What is the function of the SSB/CW-FM switch on a VHF power amplifier?

Answer 9

B. Set the amplifier for proper operation in the selected mode - T7A09 (B)

Question 10

What device increases the low-power output from a handheld transceiver?

Answer 10

B. An RF power amplifier - T7A10 (B)

Question 11

Where is an RF preamplifier installed?

Answer 11

A. Between the antenna and receiver - T7A11 (A)

Question 12

What can you do if you are told your FM handheld or mobile transceiver is over-deviating?

Answer 12

D. Talk farther away from the microphone - T7B01 (D)

Question 13

What would cause a broadcast AM or FM radio to receive an amateur radio transmission unintentionally?

Answer 13

A. The receiver is unable to reject strong signals outside the AM or FM band - T7B02 (A)

Question 14

Which of the following can cause radio frequency interference?

Answer 14

D. All of these choices are correct (A. Fundamental overload, B. Harmonics, C. Spurious emissions) - T7B03 (D)

Question 15

Which of the following is a way to reduce or eliminate interference from an amateur transmitter to a nearby telephone?

Answer 15

D. Put an RF filter on the telephone - T7B04 (D)

Question 16

How can overload of a non-amateur radio or TV receiver by an amateur signal be reduced or eliminated?

Answer 16

A. Block the amateur signal with a filter at the antenna input of the affected receiver - T7B05 (A)

Question 17

Which of the following actions should you take if a neighbor tells you that your station’s transmissions are interfering with their radio or TV reception?

Answer 17

A. Make sure that your station is functioning properly and that it does not cause interference to your own radio or television when it is tuned to the same channel - T7B06 (A)

Question 18

Which of the following can reduce overload to a VHF transceiver from a nearby FM broadcast station?

Answer 18

D. Band-reject filter - T7B07 (D)

Question 19

What should you do if something in a neighbor’s home is causing harmful interference to your amateur station?

Answer 19

D. All of these choices are correct (A. Work with your neighbor to identify the offending device, B. Politely inform your neighbor about the rules that prohibit the use of devices that cause interference, C. Check your station and make sure it meets the standards of good amateur practice) - T7B08 (D)

Question 20

What is a Part 15 device?

Answer 20

A. An unlicensed device that may emit low-powered radio signals on frequencies used by a licensed service - T7B09 (A)

Question 21

What might be a problem if you receive a report that your audio signal through the repeater is distorted or unintelligible?

Answer 21

D. All of these choices are correct (A. Your transmitter is slightly off frequency, B. Your batteries are running low, C. You are in a bad location) - T7B10 (D)

Question 22

What is a symptom of RF feedback in a transmitter or transceiver?

Answer 22

C. Reports of garbled, distorted, or unintelligible voice transmissions - T7B11 (C)

Question 23

What should be the first step to resolve cable TV interference from your ham radio transmission?

Answer 23

D. Be sure all TV coaxial connectors are installed properly - T7B12 (D)

Question 24

What is the primary purpose of a dummy load?

Answer 24

A. To prevent transmitting signals over the air when making tests - T7C01 (A)

Question 25

Which of the following instruments can be used to determine if an antenna is resonant at the desired operating frequency?

Answer 25

B. An antenna analyzer - T7C02 (B)

Question 26

What, in general terms, is standing wave ratio (SWR)?

Answer 26

A. A measure of how well a load is matched to a transmission line - T7C03 (A)

Question 27

What reading on an SWR meter indicates a perfect impedance match between the antenna and the feed line?

Answer 27

C. 1 to 1 - T7C04 (C)

Question 28

Why do most solid-state amateur radio transmitters reduce output power as SWR increases?

Answer 28

A. To protect the output amplifier transistors - T7C05 (A)

Question 29

What does an SWR reading of 4:1 indicate?

Answer 29

D. Impedance mismatch - T7C06 (D)

Question 30

What happens to power lost in a feed line?

Answer 30

C. It is converted into heat - T7C07 (C)

Question 31

What instrument other than an SWR meter could you use to determine if a feed line and antenna are properly matched?

Answer 31

D. Directional wattmeter - T7C08 (D)

Question 32

Which of the following is the most common cause for failure of coaxial cables?

Answer 32

A. Moisture contamination - T7C09 (A)

Question 33

D. Ultraviolet light can damage the jacket and allow water to enter the cable

Answer 33

- T7C10 (D)

Question 34

What is a disadvantage of air core coaxial cable when compared to foam or solid dielectric types?

Answer 34

C. It requires special techniques to prevent water absorption - T7C11 (C)

Question 35

What does a dummy load consist of?

Answer 35

B. A non-inductive resistor and a heat sink - T7C12 (B)

Question 36

Which instrument would you use to measure electric potential or electromotive force?

Answer 36

B. A voltmeter - T7D01 (B)

Question 37

What is the correct way to connect a voltmeter to a circuit?

Answer 37

B. In parallel with the circuit - T7D02 (B)

Question 38

How is a simple ammeter connected to a circuit?

Answer 38

A. In series with the circuit - T7D03 (A)

Question 39

Which instrument is used to measure electric current?

Answer 39

D. An ammeter - T7D04 (D)

Question 40

What instrument is used to measure resistance?

Answer 40

D. An ohmmeter - T7D05 (D)

Question 41

Which of the following might damage a multimeter?

Answer 41

C. Attempting to measure voltage when using the resistance setting - T7D06 (C)

Question 42

Which of the following measurements are commonly made using a multimeter?

Answer 42

D. Voltage and resistance - T7D07 (D)

Question 43

Which of the following types of solder is best for radio and electronic use?

Answer 43

C. Rosin-core solder - T7D08 (C)

Question 44

What is the characteristic appearance of a cold solder joint?

Answer 44

C. A grainy or dull surface - T7D09 (C)

Question 45

What is probably happening when an ohmmeter, connected across an unpowered circuit, initially indicates a low resistance and then shows increasing resistance with time?

Answer 45

B. The circuit contains a large capacitor - T7D10 (B)

Question 46

Which of the following precautions should be taken when measuring circuit resistance with an ohmmeter?

Answer 46

B. Ensure that the circuit is not powered - T7D11 (B)

Question 47

Which of the following precautions should be taken when measuring high voltages with a voltmeter?

Answer 47

B. Ensure that the voltmeter and leads are rated for use at the voltages to be measured - T7D12 (B)