Communication and Navigation Systems

Question 1

What are the basic auto pilot components?

Answer 1

1. Sensing elements (gyros)
2. output elements (servos)
3. command elements (flight controller)
4. computing elements (computer and amplifier)

Question 2

What are the sensing elements of an auto pilot system?

Answer 2

Attitude, directional and turning gyros in an altitude sensor office

Question 3

What are the actuating elements (output) of an auto pilot system?

Answer 3

Servos that operate the control surfaces

Question 4

What is the function of the servos in an auto pilot system?

Answer 4

The servers actuate the flight controls

Question 5

What is the most common communication system use?

Answer 5

VHF Band - 118.0 to 136.975 MHz.

Question 6

What is VOR equipment used for?

Answer 6

Navigation

Question 7

What are the components of a typical VOR system?

Answer 7

A receiver, visual indicator, frequency selector, antennas, and power supply

Question 8

What is an ADF?

Answer 8

Automatic Direction Finding

Question 9

Why are two antennas on a single multiple element antenna usually required for an ILS system?

Answer 9

One for the localizer and the other for the glideslope receivers

Question 10

What information does a glideslope radio beam provide?

Answer 10

Vertical guidance for correct angle of descent

Question 11

What is a DME?

Answer 11

Distance Measuring Equipment

Question 12

Where should DME antennas be located?

Answer 12

Generally, on the bottom of the aircraft, fuselage and location is not blocked by the wing

Question 13

What powers in emergency locator transmitter (ELT)?

Answer 13

On internal battery

Question 14

What is one method used to monitor the output signal during an ELT test?

Answer 14

A VHF communications receiver tuned to 121.5 MHz.

Question 15

What time of day should you perform the maintenance test of an installed ELT?

Answer 15

During the first five minutes after the hour for no more than three sweeps any other time should be coordinated with the nearest control tower or flight service station

Question 16

How often does the ATC transponder require certification?

Answer 16

Every 24 calendar months

Question 17

How may the determination be made to replace or recharge the batteries in an ELT even though the set operates?

Answer 17

The expiration date for replacing or recharging is marked on the outside of the transmitter, and entered into the aircraft maintenance record

Question 18

What are the basic components of a radio communication system?

Answer 18

A microphone, transmitter, transmitting and receiving antennas, a receiver, and speaker or headphones

Question 19

Describe the shape and location of a transponder antenna

Answer 19

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

Question 20

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

Answer 20

To provide low-impedance to ground return

Question 21

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

Answer 21

The cable should be supported every 2 feet and bends should not be more than 10 times the cable diameter and it should be routed separately from other wires