Communication and Navigation Systems

Question 1

Installed radio equipment is protected from damage due to jolts and vibrations by

Answer 1

shock mounts

Question 2

Radio equipment is bonded to the aircraft in order to

Answer 2

provide a low impedance ground and to minimize radio interference from static electrical charges

Question 3

When must the radio station licence be displayed in an aircraft equipped with a two-way radio?

Answer 3

When the aircraft is operated outside the US

Question 4

When would a U.S. resident NOT be required to hold a Federal Communication Commision (FCC) Restricted Radio Telephone Operated Permit to operate two-way aircraft VHF radio?

Answer 4

When flying or communicating within the United States

Question 5

Part of the ADF system used on coaxial cable, it should be secured firmly along its entire length

Answer 5

at 2 foot intervals

Question 6

When must the emergency locator transmitter (ELT) battery be replaced (other than reading the replacement date)?

Answer 6

When the transmitter has been used for more than one cumulative hour

Question 7

An emergency locator transmitter (ELT) battery must be capable of furnishing power for signal transmission for at least

Answer 7

48 hours

Question 8

The preferred location of an ELT is

Answer 8

as far aft as possible but forward of the empennage

Question 9

An emergency locator transmitter (ELT) is normally activated by an inertial switch or equivalent mechanism if subjected to a force of prescribed intensity and duration. It must activate when the force is applied

Answer 9

parallel to the longitudinal axis of the aircraft

Question 10

How may the battery replacement date be verified for an emergency locator transmitter

Answer 10

By observing the battery replacement date marked on the outside of the transmitter

Question 11

How may the operation of an installed emergency locator transmitter (ELT) be verified during aircraft inspection?

Answer 11

By tuning a communication receiver to the civil emergency frequency and activating the ELT momentarily at five minutes after the hour

Question 12

How long can an aircraft fly without an ELT?

Answer 12

90 days

Question 13

Static dischargers help eliminate radio interference by dissipating static electricity into the atmosphere at

Answer 13

low current levels

Question 14

Long range Navigation (LORAN) systems determine aircraft location by

Answer 14

means of pulsed signals transmitted from ground stations

Question 15

Aircraft antenna must be grounded to the

Answer 15

airframe

Question 16

VHF radio signals are commonly used in

Answer 16

both VOR and ATC communications

Question 17

On modern large aircraft, what electronic device typically monitors flight parameters and performs autopilot functions?

Answer 17

Flight management computer

Question 18

In the landing configuration, GPWS typically monitors the radio (radar) altimeter, air data computer, instrument landing system and

Answer 18

landing gear and flap positions

Question 19

In general, the purpose of an aircraft transponder is to

Answer 19

receive an interrogation signal from a ground station and automatically send a reply back

Question 20

When an antenna is installed, it should be fastened

Answer 20

so that loads imposed are transmitted to the aircraft structure

Question 21

After an automatic direction finding antenna has been installed, the

Answer 21

loop must be calinratedq

Question 22

Doublers are used when antennas are installed to

Answer 22

reinstate the structural strength of the aircraft skin

Question 23

One antenna can be used for the radio range and standard broadcast bands in light aircraft because the

Answer 23

two ranges are close together

Question 24

What characteristics of the installation of a rigid antenna on a vertical stabilizer should be evaluated?

Answer 24

Flutter and vibration

Question 25

A gasket or sealant is used between the antenna mast and fuselage skin

Answer 25

to prevent the entry of moisture

Question 26

The preferred location of a VOR antenna on light aircraft is on

Answer 26

top of the cabin with apex of the V pointing forward

Question 27

The purpose of a localizer is to

Answer 27

align the plane with the centre of the runway

Question 28

A DME antenna should be installed on the aircraft in a position that will

Answer 28

not be blanked out by the wing when the aircraft is banked

Question 29

When bonding coaxial cable, the bend radius should be atleast

Answer 29

10 times the diameter of the cable

Question 30

When installing a DME antenna, it should be aligned with the

Answer 30

centreline of the airplane

Question 31

The addition of avionics and associated systems forward of the CG limit will affect

Answer 31

empty weight and useful load

Question 32

How much clearance from the seat bottom is required when installing radio equipment under a seat?

Answer 32

1 inch with the seat occupied and subjected to maximum downward seat spring deflection

Question 33

The purpose of the glidescope system is to

Answer 33

assist the pilot in making a correct angle of descent to the runway