COMMUNICATION ANG NAVIGATION SYSTEM

Question 1

What is the primary purpose of an autopilot?

Answer 1

to relieve the pilot of control of the aircraft during long periods of flight

Question 2

Which of the following provides manual maneuverability of the aircraft while the autopilot is engaged?

Answer 2

flight controller

Question 3

In an autopilot, which signal nullifies the input signal to the ailerons?

Answer 3

follow up signal

Question 4

In which control element of an autopilot system is an attitude indicator?

Answer 4

sensing

Question 5

What is the operating principle of the sensing device used in an autopilot system?

Answer 5

the relative motion between a gyro and its supporting system

Question 6

What will occur if an aircraft attitude is changed by its autopilot system in order to correct for an error and the involved control surfaces are returned to streamline by the time the aircraft has reached its
correct position?

Answer 6

normal operation

Question 7

What component of an autopilot system applies torque to the control surfaces of an aircraft?

Answer 7

servo

Question 8

What is the main purpose of a servo in an autopilot system?

Answer 8

move the control surfaces as commanded

Question 9

Which channel of an autopilot detects changes in pitch attitude of an aircraft?

Answer 9

elevator

Question 10

The elevator channel of an autopilot controls the aircraft about which axis of rotation?

Answer 10

lateral

Question 11

What component is the sensing device in an electromechanical autopilot system?

Answer 11

gyro

Question 12

A fully integrated autopilot controls the aircraft around how many axes?

Answer 12

three

Question 13

Dutch roll, a combination yawing and rolling oscillation that affects many sweptwing aircraft, is counteracted with

Answer 13

a yaw damper system

Question 14

When operationally checking an autopilot system on the ground, after the aircraft’s main power has been switched on, the autopilot should be engaged

Answer 14

only after the gyros comes up to speed and the amplifier warms up

Question 15

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

Answer 15

shock mounts

Question 16

(1) Use solder to attach bonding jumpers on radio equipment.
(2) Radio equipment is bonded to the aircraft in order to provide a low-impedance ground and to
minimize radio interference from static electrical charges.
Regarding the above statements,

Answer 16

only no. 2 is true

Question 17

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

Answer 17

when the aircraft is operated outside the U.S.

Question 18

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

Answer 18

when flying or communicating within the united states

Question 19

Part of the ADF system used on aircraft includes

Answer 19

sense and loop antennas

Question 20

When installing coaxial cable, it should be secured firmly along its entire length

Answer 20

at 2 foot intervals

Question 21

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

Answer 21

when the transmitter has been in use for more than one cumulative hour

Question 22

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

Answer 22

48 hours

Question 23

The preferred location of an ELT is

Answer 23

as far as possible, but forward of the vertical fin

Question 24

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

Answer 24

parallel to the longitudinal axis of the aircraft

Question 25

How may the battery replacement date be verified for an emergency locator transmitter (ELT)?

Answer 25

by observing the battery replacement date on the outside of the transmitter

Question 26

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

Answer 26

by tuning a communications receiver to the civil emergency frequency and activating the ELT momentarily within 5 minutes after the hour

Question 27

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

Answer 27

low current levels

Question 28

Long Range Navigation (LORAN) systems determine aircraft location by

Answer 28

means of pulsed signals transmitted from ground stations

Question 29

An aircraft antenna installation must be grounded

Answer 29

to the airframe

Question 30

VHF radio signals are commonly used in

Answer 30

both VOR navigation and ATC communications

Question 31

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

Answer 31

flight management computer

Question 32

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

Answer 32

landing gear and flap positions

Question 33

In general, the purpose of an aircraft transponder is to

Answer 33

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

Question 34

When an antenna is installed, it should be fastened

Answer 34

so that loads imposed are transmitted to the aircraft structures

Question 35

After an automatic direction finding antenna has been installed, the

Answer 35

loop must be calibrated

Question 36

Doublers are used when antennas are installed to

Answer 36

reinstate the structural strength of the aircraft skin

Question 37

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

Answer 37

two ranges are close together

Question 38

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

Answer 38

flutter and vibration

Question 39

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

Answer 39

to prevent the entry of moisture

Question 40

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

Answer 40

top of the cabin with the apex of the V pointing forward

Question 41

The purpose of a localizer is to

Answer 41

align the airplane with the center of the runway

Question 42

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

Answer 42

not be blanked by the wing when the aircraft is banked

Question 43

When bending coaxial cable, the bend radius should be at least

Answer 43

10 times the diameter of the cable

Question 44

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

Answer 44

centerline on the airplane

Question 45

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

Answer 45

empty weight and useful load

Question 46

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

Answer 46

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