Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A&P - Airframe > Aircraft Instrument Systems > Flashcards

Aircraft Instrument Systems Flashcards

1
Q

The fixed line attached to the compass bowl of a magnetic compass is called?

A

The lubber line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

No.1 Aircraft instruments are color-coded to direct attention to operational ranges and limitations

A

Only No.1 is true

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which of the following will cause inaccuracies in a magnetic compass that may be compensated for by an aircraft mechanic?

A

Deviation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What will be the result if the instrument static pressure line becomes disconnected inside a pressurized cabin during cruising flight?

A

Altimeter and airspeed indicator will indicate low

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The max deviation (during level flight) permitted in a compensated magnetic direction indicator installed on an aircraft certified under part FAR 23 is

A

10 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Magnetic compass bowls are filled with a liquid to

A

dampen the oscillation of the float

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Instrument static system leakage can be detected by observing the rate of change in indication of the

A

altimeter after suction has been applied to the static system to cause a prescribed equivalent altitude to be indicated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The maximum altitude loss permitted during an unpressurized aircraft instrument static pressure system integrity check is

A

100 feet in 1 min

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which of the following instrument discrepancies could be corrected by an aviation mechanic?

A

Red line missing, mounting screws loose, case paint chipped, leaking at line B nut

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which of the follow instrument conditions is acceptable and would not require correction?

A

Case paint chipped

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

A barometric altimeter indicates pressure altitude when the barometric scale is set at

A

29.92” Hg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

A bourdon tube instrument may be used to indicate

A

pressure and temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

A turn coordinator instrument indicates

A

both roll and yaw

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Aircraft temperature thermocouple leads may

A

not be altered and are designed for a specific installation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

A synchro transmitter is connected to a synchro receiver

A

electrically with wires

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The operation of an angle of attack indicating system is based on detection of differential pressure at a point where the airstream flows in a direction

A

not parallel to the true angle of attack of the aircraft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Turbine engine exhaust gas temperature are measured by using

A

chrome/alumel thermocouples

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Which of the following causes of aircraft magnetic compass inaccuracies may be compensated for by mechanics?

A

Deviation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Who is authorised to repair an aircraft instrument?

A

A certificated repair station approved for that class instrument

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

A certificated mechanic with at least an airframe rating may perform

A

inspections and function check on aircraft instruments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What does a reciprocating engine manifold pressure gauge indicate when the engine is not operating?

A

The existing atmospheric pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

The requirements for testing and inspection of instruments static systems required by (FAR) 14 CFR Section 91.411 are contained in

A

(FAR) 14 CFR Part 43, appendix E

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Which condition would be most likely to cause excessive vacuum in a vacuum system?

A

Vacuum relief valve improperly adjusted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Data transmitted between components in an EFIS are converted into

A

digital signals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

The function of a CRT (Cathode Ray Tube) in an EFIS is to

A

display alphanumeric data and representations of aircraft instruments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

The function of a symbol generator (SG) in an EFIS is to

A

receive and process input signals from aircraft and engine sensors and send the data to the appropriate display

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

The function of a display controller in an EFIS is to

A

allow the pilot to select the appropriate system configuration for the current flight situation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

A radar altimeter determines altitude by

A

transmitting a signal and receiving back a reflected signal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

A radar altimeter indicates

A

altitude above ground level

30
Q

Resistance-type temperature using Wheatstone bridge or ratiometer circuits may be used to indicate the temperatures of which of the following?

A

Free air, carburetor air, coolant (engine), and oil temp

31
Q

When flags such as NAV, HDG or GS are displayed on an HSI, the indication is

A

that function is INOP

32
Q

Instrument panel shock mounts absorb

A

low frequency, high-amplitude shocks

33
Q

What determines the number of shock mounts that need to be installed on an instrument panel?

A

Weight of the complete panel

34
Q

Which procedure should you use if you find a if you find a vacuum-operated instrument panel glass loose?

A

Install another instrument

35
Q

Which of the following instruments will normally have range markings?

A

Cylinder head temp gauge and airspeed indicator

36
Q

How would an airspeed indicator be marked to show the best rate of climb speed (one engine inoperative)?

A

A blue radial line

37
Q

The green arc on an aircraft temperature gauge indicates

A

the desirable temperature range

38
Q

What must be done to an instrument panel that is supported by shock mounts?

A

Bonding straps must be installed across the instrument mounts as a current path

39
Q

What marking color is used to indicate the cover glass has slipped?

A

White

40
Q

Aircraft instrument should be marked and graduated in accordance with

A

the specific aircraft maintenance or flight manual

41
Q

Aircraft instrument panels are generally shock mounted to absorb

A

low frequency, high amplitude shocks

42
Q

The method of mounting aircraft instruments in their respective panels depends on the

A

design on the instrument case

43
Q

How is a flangeless instrument case mounted in an instrument panel?

A

By an expanding type clamp secured to the back of the panel and tightened by a screw from the front if the instrument panel

44
Q

Cases for electrically operated instruments are made of

A

Iron or steel cases

45
Q

When installing an instrument in an aircraft, who is responsible for making sure it is properly marked

A

The mechanic installing the instrument

46
Q

Where may a person look for the information necessary to determine the required markings on an engine instruments?

A

Aircraft flight manual or aircraft maintenance manual

47
Q

A certificated mechanic with airframe and powerplant ratings may

A

not perform repair to aircraft instruments

48
Q

The red radial lines on the face of an engine oil pressure gauge indicates

A

minimum and/or maximum safe operating limits

49
Q

A certificated mechanic may perform

A

100-hour inspections of instruments

50
Q

An aircraft instrument panel is electrically bonded to the aircraft structure to

A

provide current return paths

51
Q

How many of the following are controlled by gyroscopes?
1. Altitude indicator
2. Heading indicator
3. Turn needle of the turn and slip indicator

A

Three

52
Q

The lubber line on a directional gyro is used to

A

represent the nose of the aircraft

53
Q

Which instruments are connected to an aircrafts static pressure system only?

A

Vertical speed indicator and altimeter

54
Q

When an unpressurized aircraft static pressure system is leak checked to comply with the requirements of (FAR) 14 CFR Section 91.411, what aircraft instrument may be used in lieu of pitot-static system tester

A

Altimeter

55
Q

If a static pressure system check reveals excessive leakage, the leak(s) may be located by

A

isolating portions of the line and testing each portion systemically, starting at the instrument connections

56
Q

When performing the static system leakage check required by (FAR) 14 CFR Section 91.411, the technician utltizes

A

negative pressure

57
Q

What is the primary purpose of an autopilot?

A

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

58
Q

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

A

Flight controller

59
Q

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

A

Follow up signal

60
Q

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

A

Sensing

61
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

62
Q

What will occur if an aircraft altitude 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 aircraft has reached its correct position?

A

Normal operation

63
Q

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

A

Servo

64
Q

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

A

Move the control surface as commanded

65
Q

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

A

Elevator

66
Q

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

A

Lateral

67
Q

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

A

Gyro

68
Q

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

A

Three

69
Q

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

A

yaw damper system

70
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

A&P - Airframe (18 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions