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Flashcards in Communication And Navigation Deck (26):
1

What most common frequency range is used today

VHF (very high frequency)

2

What is the function of VOR equipment

Navigation

3

What does the term ADF stand for

Airborne direction finder

4

Name components of a typical airborne VOR navigation system

Receiver, visual indicator, antennas, and frequency selector

5

What does DME stand for

Distance measuring equipment

6

At what interval must an ATC transponder system be certified

Every 24 calendar months

7

Why are two antennas usually required for an ILS system

The localizer and glideslope because they have different frequancys

8

What is the power source for an ELT

An internal battery

9

Describe one method of monitoring the signal output during an ELT test

Tune a communications receiver to 121.5 MHz

10

How would you determine if the batteries in an ELT are due for recharge or replacement

By looking for an expiration date or in the aircraft maintenance records

11

At what time is a test of an installed ELT permitted

During the first 5 minutes after the hour and for no more that 3 sweeps

12

Where on the aircraft would you expect to find a DME antenna

On the bottom of the fuselage in a location that isn't blocked by the wing during turns

13

Describe the shape and location of a transponder antenna

Either a short blade or a short wire with a ball end located on the bottom of the fuselage

14

Name the basic components of an autopilot system

Gyros, servos, a controller, and an amplifier or computer

15

What are the sensing elements of an autopilot system

Directional , altitude control, turn-and-bank gyro, and altitude gyro

16

What is the function of the servos in an autopilot system

Actuate the flight controls

17

Describe the procedure used to route coaxial cable from an antenna to a receiver

Supported every 2 feet, bends should be 10 times the cable diameter and it should be routed separately from other wires

18

What is a transceiver

Independent transmitter and receiver that shares the same power supply, antenna and tuning device

19

What are the basic components of a radio communication system

Microphone,transmitter, transmitting and receiving antennas, receiver, and speaker or headphones

20

What is the purpose of a bonding jumper on a radio shock mount

Provides a low impedance ground return and minimize radio interference from static electricity

21

What two types of antenna are used with most ADF receivers

Directional loop antenna and a non directional sense antenna

22

What is the preferred location for a VOR antenna on an airplane

On top if the aircraft, along the center line of the fuselage

23

What frequency band is used for most aircraft communications

VHF band between 30 and 300 MHz

24

Is a certificated airframe mechanic allowed to adjust a communication transmitter

No. You need a license issued by the Federal Communications Commission

25

What are marker beacons

Gives the aircraft position well approaching the runway

26

What is the indication of the middle marker beacon

Amber light