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Engine Theory And Construction > Engine Theory And Construction Test Questions > Flashcards

Engine Theory And Construction Test Questions Flashcards

1
Q

Which law may you sum up with two words: action and reaction?

A

Newton’s third law of motion

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2
Q

The ability to work is the definition of?

A

Energy

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3
Q

Which type of horsepower determines the performance of the engine- propeller combination?

A

Equivalent shaft

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4
Q

What two fluids combined are used to make up common jet fuel?

A

Kerosene and gasoline

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5
Q

What are the three method of heat transfer?

A

Radiation, convection, and conduction

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6
Q

Where is the highest point of temperature reached in the engine?

A

Combustion section

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7
Q

On an average, what percent of all the energy produced by the fuel is required to maintain the engine operating cycle?

A

60

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8
Q

What directs the gases onto the first stage turbine wheel blades in a jet engine?

A

Turbine stator

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9
Q

Vane-type fuel pumps used on jet engines are similar to?

A

Sliding vane air compressors

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10
Q

Which condition reduces efficiency of a centrifugal compressor?

A

Pressure pulsations

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11
Q

Stationary vanes are positioned between rotor discs in a compressor are used to?

A

Direct air and increase pressure

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12
Q

What is the most probable cause of a flameout of an engine flying at 40,000 feet with a constant rpm of 50 percent?

A

The rpm is to low

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13
Q

What are three adjectives to describe carbon monoxide?

A

Poisonous, odorless, and colorless

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14
Q

What is the most chemically correct ratio for burning fuel in a combustion chamber?

A

15:1

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15
Q

What type of flame speed are swirl-type fuel nozzles normally used to provide?

A

High

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16
Q

What is placed in front of the rotating blades in a multi-stage turbine engine?

A

Turbine nozzle vane assembly

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17
Q

The exhaust duct connects the turbine outlet and the?

A

Jet nozzle

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18
Q

What is the purpose of the exhaust duct?

A

Straighten exhaust gas flow

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19
Q

Which component in the augmentor creates local turbulence and reduces gases velocity?

A

Flameholder

20
Q

Which type of defect appears on bearings as a result of of bearing parts striking together?

A

Nicks

21
Q

Which type of defect appears on bearing as a result of small particles of foreign material becoming lodged between the rollers?

A

Grooves

22
Q

Which type of bearing defect results from inadequate lubrication?

A

Galling

23
Q

Which component reduces the engine rotor speed to the rpm required for accessories?

A

Reduction geartrain

24
Q

To cause an accessory in a jet engine to operate at its most optimum speed, designer engineers must?

A

Change the gear ratio

25
Q

When the engine is running above 23 percent rpm, the propeller brake is held in the release position by?

A

Reduction gearbox RGB system oil pressure

26
Q

The purpose of the T56 safety coupling is to?

A

Disconnect the power section from the reduction gear box (RGB) assembly

27
Q

For the safety coupling to disconnect the power unit from the reduction gearbox (RGB), torque must be between?

A

-4,200 and -7,200 inch pounds

28
Q

The torque shaft can recouple to the RGB if torque decreases below approximately?

A

-6,000 inch pounds

29
Q

The type of bearings used to support the T56 compressor rotor at the front and rear include the?

A

Roller on the front and ball on the rear

30
Q

What supports the entire weight of the T56 turbine section?

A

Combustion section outer case

31
Q

What is the purpose of the turbine section?

A

Convert energy into torque

32
Q

What are used to retain the turbine buckets in the first stage wheel T56-A-15 engine?

A

Cover plate seals

33
Q

What does the bottom surface of the AE2100D3 air inlet housing provide the mounting pad for?

A

Power unit accessory drive (PUAD)

34
Q

What is the AE2100D3 power unit accessory drive (PUAD) mounted on the bottom of?

A

Forward end of the compressor air inlet housing

35
Q

What does the T700 A-sump output shaft assembly provides a mounting surface for?

A

No. 1 and No. 2 bearing

36
Q

F108 structural rigidity is obtained with a short length and by having only two main structures that are called?

A

Mainframes

37
Q

What percentage of the total engine thrust does the secondary airflow on the F108 engine produce?

A

80

38
Q

On the F108, what does the LPT shaft assembly connect the fan shaft to?

A

LPT rotor

39
Q

Which accessory is not found on the F108 AGB?

A

Augmentor pump

40
Q

On an F100-PW-220 engine, which stages of the compressor stator vanes are variable?

A

Fourth and fifth

41
Q

What stage of compressor air provides anti-icing to the inlet guide vanes of the F119-PW-100 engine?

A

9th

42
Q

Where is the total temperature sensor (Tt2) located on a F119-PW-100 engine?

A

Inside the inlet guide vane case at the 5:30 position

43
Q

How many stages are on the high pressure compressor of a F119-PW-100 engine?

A

6

44
Q

On the F119-PW-100 engine, what provides attaching points for the actuator fuel pump, main fuel pump, engine generator/breather pressurizing valve attached to the front, ODI gang drain, two chip detectors at 4:00 position, lubrication system and scavenge pump with two chip detectors, oil servicing and overfill adapter, oil flow management valve, and oil level sensor?

A

The gearbox assembly

45
Q

How many fuel nozzles are in the augmentor assembly of the F119-PW-100 engine?

A

16

Engine Theory And Construction (5 decks)

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