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Airframe Oral > Aircraft Instruments > Flashcards

Aircraft Instruments Flashcards

1
Q

What aircraft instrument can be used to check a manifold pressure gauge for proper indication

A

Sensitive altimeter

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2
Q

Name several of the indication errors that may be found in altimeters

A

Scale errors, hysteresis, friction, installation

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3
Q

What is the signal source in an electrical resistance type temperature induction system

A

A temperature bulb or sensing element

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4
Q

What type of temperature sensing system is normally used to measure a turbine engine exhaust gas temperature

A

Thermocouple type system

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5
Q

What operating parameter is indicated by a tachometer

A

Engine RPM

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6
Q

What is the name of the effect that causes a gyro to respond to an applied force at a point 90 degrees further in the direction of rotation

A

Gyroscope precession

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7
Q

What are toe items that should be considered during inspection of a magnetic compass

A
  1. The fluid must be clear
  2. Housing must be full with no bubbles
  3. Compass should be properly calibrated
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8
Q

Describe the basic operating concept of a synchro-type remote indicating system

A

A remote transmitter electrically signal a receiver inside the instrument

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9
Q

What aircraft instruments are connected to the pitot static system

A

The altimeter, vertical speed indicator, and airspeed indicator

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10
Q

Why should you avoid cleaning obstructions from the sensing holes in a pitot static system with tool

A

The holes are aerodynamically critical

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11
Q

After components in a pitot static system have been replaced what test or inspection are required

A

The static system leak test specified by FAR 91.411

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12
Q

What quantity is accurately measured by a capacitance type fuel quantity indicating system

A

The mass of the fuel

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13
Q

Who is authorized to apply the range markings to an instrument dial face

A

The manufacturer or a certificated instrument repair station

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14
Q

What is the purpose of a slippage mark on an instrument glass

A

To indicate if the glass has moved which could cause incorrect range markings on an instrument

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15
Q

What reference should be consulted to determine the proper range markings for aircraft instruments

A

Aircraft maintenance Manuel, aircraft flight manual, type certificate data sheet or aircraft specifications

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16
Q

What is the meaning of a yellow arc on an aircraft instrument

A

A caution or limited flight operations range

17
Q

What is the maximum amount of deviation error allowed when magnetic compass is installed in an aircraft

A

10 degrees

18
Q

What error is corrected when an aircraft compass is swung

A

Deviation error

19
Q

What are the vanes of a wet type air pump made of

A

Steel

20
Q

What toe types of pumps are used in the low pressure pneumatic system

A

Dry type and wet type air pump

21
Q

What are the vanes of a dry type air pump made of

A

Carbon

22
Q

Where are the requirements for the altimeter system tests found

A

Part 43 Appendix E

23
Q

How often should a altimeter be checked if it is installed in an aircraft used in IFR flight

A

Every 24 colander months

24
Q

What instrument indications will result if the static pressure line becomes disconnected inside the cabin of a pressurized aircraft

A

Altimeter and airspeed indications will be lower than normal and the vertical speed indicator will indicate a momentary decent and then return to Zero

25
Q

What are the sources of power to gyroscopic instrument operation

A

Gyroscopic instruments can be operated either by vacuum, electricity or by air pressure

26
Q

Where are instrument range marking placed

A

Placed on the outer edge of the cover glass or over the calibrations on the dial face of the instrument

27
Q

When inspecting a magnetic compass the bowl should be filled with liquid and should not contain any bubbles or discoloration. what is the purpose of the liquid in the bowl

A

To dampen the oscillations of the floats

28
Q

Why do you not try to remove blockage in a pitot system

A

To prevent further damage to the pitot system

29
Q

A static check may be performed on a manifold pressure gauge by using what piece of information

A

Current atmospheric pressure

Airframe Oral (17 decks)

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