Chapter 12 - Aircraft Avionics Systems - Oral Questions Flashcards Preview

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Flashcards in Chapter 12 - Aircraft Avionics Systems - Oral Questions Deck (20):
1

What are the basic components of a radio communication system?

A microphone,

transmitter,

transmitting and receiving antennas,

receiver, and

speaker or headphones

2

What frequency range is used by most modern voice communications systems?

VHF band, 118.0 to 136.975

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3

What does the term ADF stand for?

Automatic Direction Finder

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4

What is the function of VOR equipment?

Navigation

5

Name the components of a typical airborne VOR system

Receiver,

antennas,

frequency selector and

a visual display indicator

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6

What does DME stand for?

7

At what interval must an ATC transponder system be certified?

Every 24 calendar months

8

Why are two antennas usually required for an ILS system?

The localizer and glideslope signals are transmitted on different frequencies

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9

What information does the glideslope beam provide?

Vertical guidance to enable the aircraft to maintain the correct descent angle

10

What is the power source for an ELT

An internal battery

11

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

Tune a comm receiver to 121.5

12

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

By looking for an expiration date for recharge or replacement on the battery and/or in the aircraft maintenance records

13

At what times is a test of an installed ELT permitted?

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

14

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

Usually on the bottom of the fuselage so that it isn't blocked by the wing during turns

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15

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

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16

Name the basic components of an autopilot system

Gyros,

servos,

a controller, and

an amplifier or computer

17

What are the sensing elements of an autopilot system?

Attitude,

directional,

and turning gyros,

and an altitude sensor

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18

What is the function of the servos in the autopilot system?

The servos actuate the flight controls

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19

What is the purpose of a bonding jumper from a radio shock mount to the airframe?

To provide a low impedance ground return

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20

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

The cable should be supported every 2 feet,

bends should be 10 times the cable diameter, and

it should be routed separately (directly if possible)