Progress Test 2

Question 1

Radio transmissions are electromagnetic waves, what are they grouped into?

Answer 1

Bands

Question 2

What is VL and what is the frequency range?

Answer 2

Very Low = 3-30KHz

Question 3

What is L and what is the frequency range?

Answer 3

Low = 30-300KHz

Question 4

What is the prefix for medium frequency and what is the frequency range?

Answer 4

M = 300-3000KHz

Question 5

What is the prefix for High frequencies and what is the frequency range?

Answer 5

H = 3-30MHz

Question 6

What is the frequency for the range of 30-300MHz?

Answer 6

Very High Frequency (VHF)

Question 7

What is the frequency for the range of 300-3000MHz?

Answer 7

Ultra High Frequency (UHF)

Question 8

Super High Frequency has range of 3-30GHz, what is the prefix?

Answer 8

SHF

Question 9

Extra High Frequency has a range of 30-300GHZ, what is the prefix?

Answer 9

EHF

Question 10

True or False? Aviation is contained within protected frequency bands.

Answer 10

True, VHF frequencies are the assignable frequencies.

Question 11

What are the assignable frequencies for VHF radio communication and what is used for spacing?

Answer 11

The assignable frequencies are 118.000MHz to 136.975MHz. 8.33KHz spacing is used. (ICAO annex 10 volume 5 chapter 4)

Question 12

What is VHF propagation (VHF/UHF/SHF/EHF) used for?

Name 5

Answer 12

1. Communications
2. VOR
3. DME
4. Transponders
5. GPS

Question 13

What prohibits Line of sight?

Answer 13

Earths Curvature and high ground

Question 14

What is the equation for Line of Sight?

Answer 14

1.23 x (√aircraft altitude (ft) + √ground antenna altitude (ft))

Question 15

What is the generic rule for the limit of contacting an ATSU tower frequency?

Answer 15

Range of 25nm up to 4000ft

Question 16

What is the generic rule for the limit of contacting an ATSU approach frequency?

Answer 16

Range of 25nm up 10, 000ft

Question 17

What is the generic rule for the limit of contacting other airfields?

Answer 17

Up to 1000ft in the immediate area.
(in any event; range of 10nm up to 3000ft)

Question 18

Some stations have specific range limitations like the designed operational coverage. Where can this be found and what are the limitaitons?

Answer 18

This is declared in the AIP. The use of the facility outside the published range is not permitted.

Question 19

What can VHF radio be effected by?

Answer 19

Tropospheric Ducting - can be weather dependent (usually being effected by High pressure systems)
Generally increases the range of the signal beyond line of sight.

Question 20

Where can frequencies be found?

Answer 20

-aeronautical chart
-AIP
-En-route services (e.g. Danger areas, MATZ)