Communication And Navigation Flashcards

1
Q

What most common frequency range is used today

A

VHF (very high frequency)

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2
Q

What is the function of VOR equipment

A

Navigation

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3
Q

What does the term ADF stand for

A

Airborne direction finder

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4
Q

Name components of a typical airborne VOR navigation system

A

Receiver, visual indicator, antennas, and frequency selector

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5
Q

What does DME stand for

A

Distance measuring equipment

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6
Q

At what interval must an ATC transponder system be certified

A

Every 24 calendar months

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7
Q

Why are two antennas usually required for an ILS system

A

The localizer and glideslope because they have different frequancys

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8
Q

What is the power source for an ELT

A

An internal battery

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9
Q

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

A

Tune a communications receiver to 121.5 MHz

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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

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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

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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

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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

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14
Q

Name the basic components of an autopilot system

A

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

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15
Q

What are the sensing elements of an autopilot system

A

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

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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
What are marker beacons
Gives the aircraft position well approaching the runway
26
What is the indication of the middle marker beacon
Amber light