Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Aviation > Radio > Flashcards

Radio Flashcards

(51 cards)

Start Studying
1
Q

What is a VHF Radio?

A

A VHF (Very High Frequency) radio refers to a band of radio frequencies between 30-300 MHz.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a key limitation of a VHF Radio?

A

The main limitation is that it can only travel in straight lines from the transmitter, leading to shielding of the reception by the curvature of the Earth and obstacles such as mountains

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the primary controls present on the dashboard of a typical light airctaft?

A
  1. Transmit Selector
  2. Speaker/PhonesSelector
  3. Frequency Display Window (MHz)
  4. On/Off Volume Control
  5. Squelch Control
  6. Navigation Section
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the transmit selector and what is its purpose?

A

The transmit selector is a binary switch that is used to select the transmitting radio.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the speaker/phones selector and what is its purpose?

A

The speaker/phones selector is a switch that is used to select the medium of communication (headset or hand-held microphone).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the frequency display window and what is its purpose?

A

The frequency display window displays the selected frequency in MHz.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How to change the radio frequency?

A

The frequency is changed using two large knobs immiediately below the frequency display window. The left knob selects the whole numbers, whilst the right knob selects the decimal numbers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the on/off volume control and what is its purpose?

A

The on/off volume control is a control used to turn the radio off/on and control the volume of the signal in the receiving device.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the squelch control and what is its purpose?

A

The squelch control is used to control the sensitivity of the reception of naturally occuring background noises (referred to as squelch)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How to set squelch control?

A
  1. Set desired volume
  2. Rotate squelch control until background noise can be heard
  3. Rotate in opposite direction until the noise dissappears
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How to use the headset?

A
  1. Turn on VHF radio and select desired frequency
  2. Set transmit selector to VHF position
  3. Place speakers/phone selector to phone position
  4. Set desired volume of headset
  5. Adjust the squelch
  6. To transmit, press the ‘press to talk’ button located on the control column
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How to use hand-held microphone?

A
  1. Turn on VHF radio and select desired frequency
  2. Set transmit selector to VHF position
  3. Place speakers/phone selector to speaker position
  4. Set desired volume of headset
  5. Adjust the squelch
  6. To transmit, press the ‘press to talk’ button located on the side or front of microphone
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Recite Phonic Alphabet

A

Alpha
Bravo
Charlie
Delta
Echo
Foxtrot
Golf
Hotel
India
Juliett
Kilo
Lima
Mike
November
Oscar
Papa
Quebec
Romeo
Sierra
Tango
Uniform
Victor
Whiskey
X-Ray
Yankee
Zulu

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How are numbers transmitted?

A

Numbers are transmitted digit by digit (3 - three or tree, 9 - niner). Whole hundreds and thousands can be pronounced with the words “hundred” or “thousand” etc.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How is time transmitted?

A

Time is expressed as a four figure (hours and minutes) or only minutes past current hour.

“Zero Three Three Five” or “Three Five”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How to indicate an emergency message?

A

To indicate a message is vital, prefix it with the word “MAYDAY” three times

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

How to indicate urgency message or PAN-PAN Call

A

To indicate a message is vital but not a situation placing the aircraft in vital danger, prefix it with the word “PAN-PAN” three times

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the key contents of a distress message?

A

Who you are
What you are
Where you are
What has happened
What you intend to do

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How to troubleshoot radio?

A
  1. Check radio is turned on and volume is correctly set
  2. Check squelch control is correctly set
  3. Check that the correct frequency is selected
  4. Check avionics to be on (if applicable)
  5. Check transmit selector switch is set to VHF radio
  6. Check that the speaker/phones selector is correctly set
  7. Check headset volume is correctly set (if applicable)
  8. If using headphones, check the two plugs are correctly plugged
  9. If using hand-held microphone, check that it is correctly plugged
  10. Check the radio circuit breakers and fuses
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is radio voice communication in aviation referred to as?

A

It is referred to as ‘Radio Telephony’ (RTF or R/F)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is the avergae hearing range of a human?

22
Q

What does a Hz refer to

Study These Flashcards
A

One cycle of a wave per second

23
Q

What is the shape of a sound wave?

Study These Flashcards
A

Sine wave/curve

24
Q

What does the frequency refer to?

Study These Flashcards
A

The amount of waves occuring within one second

25
What does amplitude refer to?
Amplitude refers to the height between the creset or trough and the resting point
26
What is the speed of sound?
approximately 340m/s
27
How to transmit cloud cover?
- In eights of the sky covered (eights is communicated as "oktas" e.g half of sky covered = four oketas
28
What is an Automatic Direction Finder (ADF)?
An ADF is a navigation electronically connected to an instrument in the cockpit. It receives signals from a non-directional beam, transmitted from the ground. The needle on the instrument points in the direction of the station.
29
What is radar?
Radar (radio detection and ranging) is used to establish the bearing, distance and altitude of nearby other aircraft through the transmission and reception of an electromagnetic signal. Echo: Skin Paint System Primary Radar
30
What is primary radar?
Primary Radar is a device that transmits a pulse and relies on the reflection of it to a reciever to convert the details of the reflection into bearing and distance
31
Important transponder codes:
1200 - VFR aircraft not participating in radar information services 7600 - radio failure 7700 - serious emergency
32
What are the transponder operating modes?
OFF - Power is off SBY - Standby, power on, ready to operate ON - Transmits the set code when interrogated ALT - Transmits the set code and aircraft altitude when interrogated TST - Checks function, transmits code once IDENT - Symbol flashes on ATC radar screen
33
What are the three degrees of emergency?
Mayday Pan-Pan Security
34
What does a Steady Green Signal during flight mean?
Authorised to land if yoiu are satisfied that no collision risk exists
35
What does a Steady Green Signal on ground mean?
Authorised to take-off if you are satisfied no collision risk exists
36
What does a Steady Red Signal during flight mean?
Give way to other aircraft and continue circling
37
What does a Steady Red Signal on ground mean?
Stop where you are
38
What does a Flashing Green Signal during flight mean?
Return for immiediate landing
39
What does a Flashing Green Signal on ground mean?
Authorised to taxi if you are satisfied that no risk of collision exists
40
What does a Flashing Red Signal during flight mean?
Aerodome unsafe - do not land
41
What does a Flashing Red Signal on ground mean?
Taxi clear of landing area in use
42
What does a Flashing White Signal during flight mean?
Nothing
43
What does a Flashing White Signal on ground mean?
Return to starting point of aerodrome
44
What is the emergency locator transmitter?
The emergency locator transmitter (ELT) is a VHF radio transmitter capable of sending a signal simulatenously on the international distress frequencies (121.5 and 243 MHz)
45
What does CTAF refer to?
CTAF (Common Traffic Advisory Frequency) refers to the given VHF radio frequency of a specific non-towered airport within AU, U.S and Canada.
46
What is deemd as an unauthorised transmission?
A transmission that involves swearing or talking in a foreign language
47
When should an inbound call be made?
10nm out from an airport (dependent on size and speed of aircraft)
48
What type of calls are mandatory?
Calls to indicate a potential collision
49
What does QNH mean?
Sea level pressure
50
What to do if there is no published CTAF frequency?
If there is no published CTAF frequency the standard frequency to use in Australia also known as the Multicom frequency is 126.7.
51
Where can one find the area frequencies for flight outside of controlled airspace?
On the VTC, VNC, ERC Low or in the ERSA

Aviation (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions