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Flashcards in Communication And Navigation Deck (26)
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1
Q

What most common frequency range is used today

A

VHF (very high frequency)

2
Q

What is the function of VOR equipment

A

Navigation

3
Q

What does the term ADF stand for

A

Airborne direction finder

4
Q

Name components of a typical airborne VOR navigation system

A

Receiver, visual indicator, antennas, and frequency selector

5
Q

What does DME stand for

A

Distance measuring equipment

6
Q

At what interval must an ATC transponder system be certified

A

Every 24 calendar months

7
Q

Why are two antennas usually required for an ILS system

A

The localizer and glideslope because they have different frequancys

8
Q

What is the power source for an ELT

A

An internal battery

9
Q

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

A

Tune a communications receiver to 121.5 MHz

10
Q

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

A

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

11
Q

At what time is a test of an installed ELT permitted

A

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

12
Q

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

A

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

13
Q

Describe the shape and location of a transponder antenna

A

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

14
Q

Name the basic components of an autopilot system

A

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

15
Q

What are the sensing elements of an autopilot system

A

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

16
Q

What is the function of the servos in an autopilot system

A

Actuate the flight controls

17
Q

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

A

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

18
Q

What is a transceiver

A

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

19
Q

What are the basic components of a radio communication system

A

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

20
Q

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

A

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

21
Q

What two types of antenna are used with most ADF receivers

A

Directional loop antenna and a non directional sense antenna

22
Q

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

A

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

23
Q

What frequency band is used for most aircraft communications

A

VHF band between 30 and 300 MHz

24
Q

Is a certificated airframe mechanic allowed to adjust a communication transmitter

A

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

25
Q

What are marker beacons

A

Gives the aircraft position well approaching the runway

26
Q

What is the indication of the middle marker beacon

A

Amber light