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Jet Engine Troubleshooting, Operation, Testing, And Famage Analysis > Instrumentation And Test Equipment > Flashcards

Instrumentation And Test Equipment Flashcards

0
Q

What will an understanding of the operating principle of the engine instruments help you decide?

A

The meanings of the instrument readings

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1
Q

To be considered effective tools for aviators, aircraft instruments must be?

A

Light weight, easy to read, and small in size

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2
Q

Most engine monitoring gauges and instruments require some type of?

A

Transmitter and indicator

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6
Q

What does the engine fuel-flow indicting system of most jet powered aircraft contain?

A

Fuel-flow transmitter and a fuel-flow indicator

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7
Q

What fuel system component of a jet engine that operates using a water wheel concept?

A

Fuel-flow transmitter

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8
Q

What are the two units that work together to indicate the oil system correctly?

A

Oil transmitter and indicator

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9
Q

What does an oil pressure transmitter contain?

A

A mechanical section and a synchronous unit

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10
Q

Where does the oil pressure indicator receive an electrical signal from?

A

The transmitter

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11
Q

What are the two primary units of the tachometer indicating system?

A

Tachometer generator and indicator

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12
Q

What type of instrument is the tachometer indicator?

A

Electric magnetic-drag type

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13
Q

What is the frequency of the tachometer generator proportional to?

A

The engine speed

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14
Q

On engines with afterburners, the piston of the exhaust nozzle in converted into an electrical signal by a?

A

Transducer

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15
Q

During an engine operational check of the fire warning system, you press?

A

Only the TEST switch

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16
Q

What is used to indicate the amount of thrust in a dual-compressor engine producing?

A

Engine pressure ratio (EPR)

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17
Q

What does the term “Pt2” mean?

A

Total pressure at station 2

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18
Q

What are the pressures used in operation of the EPR system?

A

Engine inlet total pressure and exhaust total pressure

19
Q

How is the inlet pressure (Pt2) transmitted from its sensing point?

A

Trough tubing

20
Q

While testing an engine on a test cell, a breather pressure gauge displaying excessively high breather pressure is usually an indication of?

A

Damage to engine bearing oil seals

21
Q

The direct oil pressure gauge on a test cell is connected to an engine oil pressure line to indicate oil pressure without using?

A

Wiring, indicator, or aircraft transmitter

22
Q

What does the test cell EGT selector allow a selection of?

A

Individual thermocouple inputs or an average of these inputs

23
Q

The test cell fuel-flow rate indicator automatically controls the solenoid valves in the fuel module in order to deliver fuel flow through the?

A

Flow turbines

24
Q

When properly adjusted, the accuracy of the test cell N1 and N2 speed indicator in the rpm will be within?

A

2 rpm

25
Q

The test cell instigated circuit (IC) temperature indicator displays temperature in degrees Fahrenheit, with a range of?

A

-50 to 1,600 degrees

26
Q

What type of vibration causes unnecessary engine removals and warrant repairs?

A

Externally exited

27
Q

What kind of engine vibration does not persist, but comes and goes?

A

Transient

28
Q

During vibration analysis, what is frequency usually measured in?

A

Cycles per second

29
Q

During vibration analysis, amplitude is measures in mils. What is mil equal to?

A

.001 inch

30
Q

What two types of transducers are used to measure vibration?

A

Piezoelectric accelerometer and velocity

31
Q

Which type of vibration transducer is made up of certain ceramic compounds and natural crystals?

A

Piezoelectric accelerometer

32
Q

To find the instructions for installing vibration pickups at a test cell, you should check the?

A

Intermediate maintenance Manuel

33
Q

When you are using a vibration analyzer, you should be notified when a preset signal has been exceeded by?

A

Flashing channel indicator LED

34
Q

The filter selector switch on the vibration analyzer is used to?

A

Allow selection of the necessary filter

35
Q

What are used to support the fan and low-pressure turbine?

A

Bearings

36
Q

What procedure is used to ensure the fan and low-pressure turbine are correctly balanced?

A

Fan rotor trim balance

37
Q

What jet engine temperatures are measured?

A

Exhaust gas, turbine inlet, and fan turbine inlet

38
Q

What does a typical jet engine EGT indicating system contain?

A

Thermocouples, leads, an indicator, and resistor

39
Q

Which metals are used in thermocouples of the EGT?

A

Alumel and chromel

Jet Engine Troubleshooting, Operation, Testing, And Famage Analysis (4 decks)

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