Basic Propagation Theory

Question 1

What is an NDB connected with?

Answer 1

ADF

Question 2

What type of indication do radio waves give?

Answer 2

Magnetic

Question 3

What is the speed of light in nautical miles per second?

Answer 3

161,800nm/s

Question 4

What is a cycle?

Answer 4

A completed series of values of a periodical process.

Question 5

What is the principle of operation of a vor?

Answer 5

Phase angle

Question 6

Whats another name for direct and line of sight waves?

Answer 6

Space waves.

Question 7

What frequency does ILS LOC use?

Answer 7

Very high

Question 8

What frequency does ILS GP use?

Answer 8

Ultra High

Question 9

What is the first character of a radio signal?

Answer 9

The type of modulation.

Question 10

What is the second character of a radio signal?

Answer 10

Nature of the signal

Question 11

What is the third character of a radio signal?

Answer 11

Type of information transmitted

Question 12

What is the code for a carrier without modulation?

Answer 12

N0N

Question 13

What is the code for a carrier with keyed morse code modulation?

Answer 13

A1A

Question 14

What is the code for a carrier with amplitude modulated morse code?

Answer 14

A2A

Question 15

Whats the code for a carrier with amplitude modulated speech?

Answer 15

A3E

Question 16

Whats the code for a DME?

Answer 16

P0N

Question 17

Whats the code for an ILS?

Answer 17

A8W

Question 18

Whats the code for a VOR?

Answer 18

A9W

Question 19

What is the simplest form of modulation?

Answer 19

Keying

Question 20

Where would you see single sidebands?

Answer 20

HF comms and HF VOLMET

Question 21

Any conductor with an alternating current through it because a what?

Answer 21

Wave transducer

Question 22

What is the simplest form of an antenna?

Answer 22

Half wave dipole

Question 23

Where do you get no signal on a dipole antenna?

Answer 23

Above

Question 24

Where would you find a loop antenna?

Answer 24

ADF

Question 25

Where would you find a parabolic antenna?

Answer 25

Older AWR

Question 26

Where would you find a slotted planar array antenna?

Answer 26

Modern AWR

Question 27

Where would you see a helical antenna?

Answer 27

GPS

Question 28

What frequency and above only sees space and line of sight wave propagation?

Answer 28

VHF

Question 29

What ionosphere layer disappears at night?

Answer 29

D

Question 30

What is the skip distance?

Answer 30

Aerial to first returning sky wave.

Question 31

Whats skip zone?

Answer 31

Distance between surface wave and first returning sky wave.

Question 32

What does natural static noise affect?

Answer 32

VHF and below

Question 33

What does man made static noise affect?

Answer 33

VHF and above

Question 34

What is Fading?

Answer 34

Interference of a ground wave and a sky wave.

Question 35

A student pilot has just learnt that meteorological information for aircraft en route on long-haul flights is sent by radio. What kind of radio receiver is needed to receive this information?

Answer 35

Single side band reciever

Question 36

Which aeronautical radio frequency band uses refraction within ionospheric layers?

Answer 36

HF

Question 37

Which aeronautical radio frequency band uses refraction within ionospheric layers?

Answer 37

HF