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Avionics > COMMUNICATION ANG NAVIGATION SYSTEM > Flashcards

COMMUNICATION ANG NAVIGATION SYSTEM Flashcards

1
Q

What is the primary purpose of an autopilot?

A

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

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2
Q

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

A

flight controller

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3
Q

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

A

follow up signal

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4
Q

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

A

sensing

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5
Q

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

A

the relative motion between a gyro and its supporting system

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6
Q

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?

A

normal operation

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7
Q

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

A

servo

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8
Q

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

A

move the control surfaces as commanded

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9
Q

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

A

elevator

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10
Q

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

A

lateral

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11
Q

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

A

gyro

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12
Q

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

A

three

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13
Q

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

A

a yaw damper system

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14
Q

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

A

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

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15
Q

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

A

shock mounts

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16
Q

(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,

A

only no. 2 is true

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17
Q

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

A

when the aircraft is operated outside the U.S.

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18
Q

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?

A

when flying or communicating within the united states

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19
Q

Part of the ADF system used on aircraft includes

A

sense and loop antennas

20
Q

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

A

at 2 foot intervals

21
Q

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

A

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

22
Q

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

A

48 hours

23
Q

The preferred location of an ELT is

A

as far as possible, but forward of the vertical fin

24
Q

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

A

parallel to the longitudinal axis of the aircraft

25
Q

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

A

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

26
Q

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

A

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

27
Q

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

A

low current levels

28
Q

Long Range Navigation (LORAN) systems determine aircraft location by

A

means of pulsed signals transmitted from ground stations

29
Q

An aircraft antenna installation must be grounded

A

to the airframe

30
Q

VHF radio signals are commonly used in

A

both VOR navigation and ATC communications

31
Q

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

A

flight management computer

32
Q

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

A

landing gear and flap positions

33
Q

In general, the purpose of an aircraft transponder is to

A

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

34
Q

When an antenna is installed, it should be fastened

A

so that loads imposed are transmitted to the aircraft structures

35
Q

After an automatic direction finding antenna has been installed, the

A

loop must be calibrated

36
Q

Doublers are used when antennas are installed to

A

reinstate the structural strength of the aircraft skin

37
Q

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

A

two ranges are close together

38
Q

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

A

flutter and vibration

39
Q

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

A

to prevent the entry of moisture

40
Q

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

A

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

41
Q

The purpose of a localizer is to

A

align the airplane with the center of the runway

42
Q

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

A

not be blanked by the wing when the aircraft is banked

43
Q

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

A

10 times the diameter of the cable

44
Q

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

A

centerline on the airplane

45
Q

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

A

empty weight and useful load

46
Q

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

A

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

Avionics (9 decks)

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