Communiciation & Navigation Systems Flashcards Preview

A&P Airframe Oral Practice Questions > Communiciation & Navigation Systems > Flashcards

Flashcards in Communiciation & Navigation Systems Deck (24)
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1
Q
  1. Name the basic components of a communication system.
A

Microphone
Transmitter
Transmitter antenna
Receiving antenna
Receiver
Headset or loudspeaker

2
Q
  1. What is the most common communication system in use today?
A

It is the VHF system

3
Q
  1. Which radio system is used for long range communication?
A

HF (high system) system

4
Q
  1. What is a transceiver?
A

Self contained transmitter & receiver which shares same power supply, antenna, & tuning device

5
Q
  1. What type of conductor is used for transmitting information between antennas and receiver/transmitters?
A

Coaxial cable

6
Q
  1. Describe a BNC type connector.
A

Connector used with coaxial cable 1/4 turn to seat

7
Q
  1. What are the components of a typical VOR system?
A

Receiver
Visual indicator
Dipole antenna
Power supply

8
Q
  1. What are the basic component of an autopilot system?
A

Gyros
Servos
Amplifier

9
Q
  1. What are the sensing elements of an autopilot system?
A

Directional gyro
Turn & bank gyro
Attitude gyro
Altitude control

10
Q
  1. What are the output elements of an autopilot system?
A

Servos which actuate control surfaces

11
Q
  1. What are three types of servos used in autopilot system?
A

Hydraulic
Pneumatic
Electric

12
Q
  1. What is the purpose of a bonding jumper/wire on a radio shock mount?
A

Provide low impedance ground return & minimize radio interference from static electricity

13
Q
  1. What is the frequency of an emergency locator transmitter (ELT)?
A

121.5, 243.0, & 406.0 MHz

14
Q
  1. How can you determine when the batteries of an ELT should be replaced?
A

Useful life is determined by the battery manufacture
Battery replacement date must be marked on outside of battery transmitter
Time is computed from the date of manufacture of battery

15
Q
  1. Describe the proper method of routing coaxial cable from the antenna to the receiver.
A

Secure firmly every 24”.
Do not secure to other wire bundles use as short as possible cable
If bending 10x the size of cable diameter

16
Q
  1. Where is the preferred location for mounting a VOR antenna on the small aircraft?
A

On top fwd part of cabin or on top vertical stabilizer

17
Q
  1. Where should antennas be located?
A

Lower surface of aircraft not blocked by wings when banking

18
Q
  1. Why are doubles required to be installed under aircraft skin when an antenna is mounted on the aircraft skin?
A

Prevent cracking in skin

19
Q
  1. What are marker beacons?
A

Part of ILS system indicated aircraft position on approach to runway

20
Q
  1. What is the indication of the middle marker beacon?
A

Amber light & audible tone

21
Q
  1. What is an ADF?
A

Automatic direction finder

22
Q
  1. What does DME stand for?
A

Distance Measuring Equipment

23
Q
  1. What two parts make up the ILS system?
A

Localizer & glideslope

24
Q
  1. Explain how to determine the pressure altitude to an airfield and how to set it in the altimeter.
A

Listen to ATIS and adjust to Barometric pressure altitude or adjust to field elevation then look at kollsman window for barometric pressure