Radio Basics and Equipment

Question 1

Hierarchy of high frequencies?

Answer 1

High
Very High
Ultra High
Super High
Extra High

Question 2

What is the highest bracket of frequencies?

Answer 2

Extra High (EHF)

Question 3

What is the second highest bracket of frequencies?

Answer 3

Super High (SHF)

Question 4

Extra and Super High Frequencies operate with what unit of frequency?

Answer 4

Giga-hertz

Question 5

What is the VHF’s bracket of frequencies?

Answer 5

30 - 300 MHz

Question 6

What is the protected range of frequencies for aviation?

Answer 6

118.000 to 136.975 MHz

Question 7

What term is given to the range of VHF and other associated frequencies?

Answer 7

Line of sight

Question 8

What two faactors prohibit/restrict VHF etc?

Answer 8

Curvature and terrain

Question 9

Line of sight formula?

Answer 9

1.23 x Square Root of Altitude Difference

Question 10

Most tower and approach frequencies have what lateral range?

Answer 10

25nm

Question 11

Tower frequency ranges?

Answer 11

25nm
4000ft

Question 12

Approach frequency ranges?

Answer 12

25nm
10,000ft

Question 13

What term describes the range of frequencies published in the AIP?

Answer 13

Designated Operational Coverage

Question 14

What does DOC stand for?

Answer 14

Designated Operational Coverage

Question 15

Designated Operational Coverage can be found where?

Answer 15

AIP

Question 16

What weather factor affects DOC?

Answer 16

Tropospheric ducting

Question 17

Tropospheric ducting increases frequency ranges typically during what weather?

Answer 17

Anticyclonic (causing temperature inversions)

Question 18

Basics of tropospheric ducting?

Answer 18

Colder denser air on the ground slows waves down
Warmer less dense air above (caused by high pressure) means wave curves downwards in terms of range

Question 19

ILS frequencies operate in what bracket?

Answer 19

108.000 to 111.975 MHz

Question 20

VOR frequencies operate in what bracket?

Answer 20

112.000 to 117.975 MHz

Question 21

What operates in 108.000 to 111.975 MHz?

Answer 21

ILS

Question 22

What operates in 112.000 to 117.975 MHz?

Answer 22

VOR

Question 23

On a volume knob, how is squelch usually turned off?

Answer 23

By pulling the knob out

Question 24

Pulling a volme knob outwards typically does what?

Answer 24

Turns the squelch off

Question 25

What is side-tone?

Answer 25

Hearing your own voice during transmission

Question 26

Hearing your own voice during transmission is given what term?

Answer 26

Side-tone

Question 27

What numbers on the readability scale are acceptable?

Answer 27

4 and 5

Question 28

When conducting a radio check, what must be included?

Answer 28

The frequency and ATSU name

Question 29

The frequency and ATSU name should be transmttted when performing what?

Answer 29

A radio check

Question 30

What is VOX?

Answer 30

Voice-operated transmit

Question 31

Voice-operated transmit is known as what?

Answer 31

VOX

Question 32

When should squelch be set to minimum?

Answer 32

When setting up the radio

Question 33

When setting up the radio, what should be done on the radio pane;?

Answer 33

Squelch should be set to a minimum

Question 34

What is the most basic kind of radar?

Answer 34

Primary Surveillance Radar (PSR)

Question 35

What frequency does an SSR operate at?

Answer 35

UHF

Question 36

What sends a UHF signal in an SSR system?

Answer 36

The transponder

Question 37

A transponder willl only transmit a squawk in what mode?

Answer 37

Mode Alpha

Question 38

Mode Alpha means a transponder will only transmit what by UHF?

Answer 38

The squawk code

Question 39

AIP ENR recommends that Mode C should be downgraded to Mode A when the transponder and altimeter indicate a difference of what?

Answer 39

200ft

Question 40

If your transponder altitude difference is greater than 200ft and you can't downgrade to Mode A, what would you normally be advised to do?

Answer 40

Squawk 0000 to indicate transponder malfunction

Question 41

What is the aerobatic conspicuity code?

Answer 41

7004

Question 42

What does squawk code 7004 represent?

Answer 42

Aerobatic conspicuity code