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Aircraft Engineering > Aircraft Instrument > Flashcards

Aircraft Instrument Flashcards

1
Q

An aircraft magnetic compass is swung to up-date the compass correction card when

A

Equipment is added that could effect compass deviation

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2
Q

The operating mechanism of most hydraulic pressure gauges is

A

Bourdon tube

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3
Q

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

A

Lubber line

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4
Q

(1) Aircraft instruments are color-coded to direct attention to operational ranges and limitations.
(2) Aircraft instruments range markings are not specified by Title 14 of the Code of Federal Regulations
but are standardized by aircraft manufacturers.
Regarding the above statements,

A

Only 1 is true

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5
Q

When swinging a magnetic compass, the compensators are adjusted to correct for

A

Magnetic influence deviation

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6
Q

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

A

The altimeter and airspeed indicator will both read low

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7
Q

The maximum deviation (during level flight) permitted in a compensated magnetic direction indicator
installed on an aircraft certificated under Federal Aviation Regulation Part 23 is

A

10 degrees

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8
Q

Magnetic compass bowls are filled with a liquid to

A

Dampen the oscillation of the float

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9
Q

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

A

100 feet in 1 minute

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10
Q

Which statement regarding an aircraft instrument vacuum system is true?

A

Dry type vacuum pump with carbon vanes are very susceptible to damage from solid airborne
particles and must take in only filtered air

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11
Q

When an aircraft altimeter is set at 29.92” Hg on the ground, the altimeter will read

A

Pressure altitude

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12
Q

Which of the following instrument discrepancies could be corrected by an aviation mechanic?
1. Red line missing.
2. Case leaking.
3. Glass cracked.
4. Mounting screws loose.
5. Case paint chipped.
6. Leaking at line B nut.
7. Will not adjust.
8. Fogged.

A

1,4,5,6

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13
Q

Which of the following instrument discrepancies would require replacement of the instrument?
1. Red line missing.
2. Case leaking.
3. Glass cracked.
4. Mounting screws loose.
5. Case paint chipped.
6. Leaking at line B nut.
7. Will not zero out.
8. Fogged.

A

2,3,7,8

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14
Q

Which of the following instrument conditions is acceptable and would not require correction?
1. Red line missing.
2. Case leaking.
3. Glass cracked.
4. Mounting screws loose.
5. Case paint chipped.
6. Leaking at line B nut.
7. Will not zero out.
8. Fogged.

A

5

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15
Q

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

A

29.92” hg

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16
Q

A Bourdon tube instrument may be used to indicate
1. pressure.
2. temperature.
3. position.

A

1 and 2

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17
Q

A turn coordinator instrument indicates

A

Both roll and yaw

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18
Q

Thermocouple leads

A

Are designed for specific installation and may not be altered

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19
Q

A synchro transmitter is connected to a synchro receiver

A

Electrically with wires

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20
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

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21
Q

Turbine engine exhaust gas temperatures are measured by using

A

Chromel/alumel thermocouples

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22
Q

Fuel flow transmitters are designed to transmit data

A

Electrically

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23
Q

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

A

Deviation

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24
Q

Who is authorized to repair an aircraft instrument?
1. A certified mechanic with an airframe rating.
2. A certificated repairman with an airframe rating.
3. A certificated repair station approved for that class instrument.
4. A certificated airframe repair station.

A

3

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25
Q

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

A

The existing atmospheric pressure

26
Q

The requirements for testing and inspection of instrument static systems required by Section 91.411 are
contained in

A

PART 43, APPENDIX E

27
Q

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

A

Vacuum relief valve improperly adjusted

28
Q

Data transmitted between components in an EFIS are converted into

A

Digital signal

29
Q

The function of a CRT in an EFIS is to

A

Display alphanumeric data and representations of aircraft instruments

30
Q

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

A

Receive and process input signals from a/c and engine sensors and sent the data to the appropriate display

31
Q

A radar altimeter determines altitude by

A

Transmitting a signal and receiving bask a reflected signal

32
Q

A radar altimeter indicates

A

Altitude above ground level

33
Q

Resistance-type temperature indicators using Wheatstone bridge or ratiometer circuits may be used to
indicate the temperatures of which of the following?
1. Free air.
2. Exhaust gas temperature.
3. Carburetor air.
4. Coolant (engine).
5. Oil temperature.
6. Cylinder head temperature.

A

1,3,4 and 5

34
Q

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

A

That function is inoperative

35
Q

Instrument panel shock mounts absorb

A

Low frequency ,high amplitude shocks

36
Q

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

A

Install another instrument

37
Q

Which instruments are connected to an aircraft’s pitot-static system?
1. Vertical speed indicator.
2. Cabin altimeter.
3. Altimeter.
4. Cabin rate-of-change indicator.
5. Airspeed indicator.

A

1,3 and 5

38
Q

How many of the following instruments will normally have range markings?
1. Airspeed indicator.
2. Altimeter.
3. Cylinder head temperature gauge.

A

Two

39
Q

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

A

Blue radial line

40
Q

The green arc on an aircraft temperature gauge indicates

A

Desirable temperature range

41
Q

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

A

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

42
Q

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

A

White

43
Q

Aircraft instruments should be marked and graduated in accordance with

A

The specific aircraft maintenance or flight manual

44
Q

Aircraft instrument panels are generally shock-mounted to absorb

A

Low frequency, high amplitude shocks

45
Q

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

A

Design of the instrument case

46
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 of the panel

47
Q

Cases for electrically operated instruments are made of

A

Iron or steel cases

48
Q

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

A

Instrument installer

49
Q

Where may a person look for the information necessary to determine the required markings on an
engine instrument?
1. Engine manufacturer’s specifications.
2. Aircraft flight manual.
3. Instrument manufacturer’s specifications.
4. Aircraft maintenance manual.

A

2 or 4

50
Q

A certificated mechanic with airframe and powerplant ratings may

A

Not perform repairs to aircraft instruments

51
Q

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

A

Minimum or maximum safe operating limits

52
Q

A certificated mechanic may perform

A

100 hour inspection of instruments

53
Q

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

A

Provide current return paths

54
Q

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

A

Three

55
Q

The lubber line on a directional gyro is used to

A

Represents the nose of the aircraft

56
Q

Which instruments are connected to an aircraft’s static pressure system only?
1. Vertical speed indicator.
2. Cabin altimeter.
3. Altimeter.
4. Cabin rate-of-change indicator.
5. Airspeed indicator.

A

1 and 3

57
Q

When an unpressurized aircraft’s static pressure system is leak checked to comply with the
requirements of Section 91.411, what aircraft instrument may be used in lieu of a pitot-static system
tester?
1. Vertical speed indicator.
2. Cabin altimeter.
3. Altimeter.
4. Cabin rate-of-change indicator.
5. Airspeed indicator.

A

3

58
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 systematically starting at the instrument
connections

59
Q

When performing the static system leakage check required by Section 91.411, the technician utilizes

A

Negative Pressure

60
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 prescribe equivalent
altitude to be indicated

Aircraft Engineering (12 decks)

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