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😵‍💫 > POWERPLANT- GENERAL > Flashcards

POWERPLANT- GENERAL Flashcards

1
Q

What does the term ‘powerplant’ refer to in aviation?

A

The engine and associated components

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2
Q

What is the primary purpose of an aircraft powerplant?

A

To provide the necessary thrust to propel the aircraft

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3
Q

What is ‘thrust’ in the context of an aircraft engine?

A

The force generated by the engine to move the aircraft forward

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4
Q

In a reciprocating engine, what does the term ‘stroke’ refer to?

A

The movement of the piston from top to bottom

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5
Q

What is the main disadvantage of using a reciprocating engine in aircraft?

A

Low power-to-weight ratio

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6
Q

What is the purpose of an engine cowling?

A

Reduce drag and aid in cooling

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7
Q

Which type of fuel is typically used in reciprocating engines?

A

Avgas

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8
Q

Which type of fuel is typically used in jet engines?

A

Jet-A

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9
Q

Which type of engine uses a propeller to generate thrust?

A

Turboprop

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10
Q

Which type of engine is most commonly used in commercial airliners?

A

Turbofan engine

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11
Q

What is the main function of an aircraft engine’s oil system?

A

Lubricate moving parts

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12
Q

What does the term ‘specific fuel consumption’ refer to?

A

The fuel required to produce a unit of thrust

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13
Q

What is a turbojet engine primarily used for?

A

High-speed and high-altitude flight

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14
Q

What is the primary purpose of using fuel additives in aviation fuels?

A

To prevent corrosion and icing

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15
Q

According to FAA regulations, what color is 100LL aviation gasoline (AVGAS)?

A

Blue

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16
Q

Regulations state that fuel system icing inhibitors must be added to which type of fuel?

A

Jet-A

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17
Q

What does the term ‘compressor stall’ refer to in a jet engine?

A

Momentary loss of airflow through the compressor

18
Q

Which type of turbine is commonly used in modern jet engines?

A

Axial-flow turbine

19
Q

What does the term ‘bypass ratio’ refer to in a turbofan engine?

A

Ratio of bypassed air to engine core air

20
Q

What is the primary advantage of using a turbofan engine over a turbojet engine?

A

Better fuel efficiency

21
Q

What is the purpose of an oil cooler bypass valve in an aircraft engine?

A

Bypass oil when it is cold

22
Q

Which type of turbine engine uses both axial and centrifugal compressors?

A

Turboshaft

23
Q

What is the purpose of a fire sleeve in an aircraft engine?

A

Protect fuel lines from heat and flames

24
Q

What is the purpose of the diffuser in a centrifugal compressor?

A

Convert kinetic energy into pressure

25
Q

What is the primary purpose of the induction system in an aircraft engine?

A

Supply air to the engine

26
Q

What is the function of a fuel vapor separator in an aircraft fuel system?

A

Separate air from fuel

27
Q

What is the primary purpose of oil additives in aircraft engines?

A

To enhance lubrication and reduce wear

28
Q

The primary purpose of an engine oil cooler is to:

A

Maintain optimum oil temperature

29
Q

What is the function of a fuel pump in an aircraft fuel system?

A

To pressurize and deliver fuel to the engine

30
Q

What is the function of a de-icing boot on an aircraft engine?

A

Remove ice from the propeller and engine surfaces

31
Q

What does the term ‘stoichiometric mixture’ refer to in engine operation?

A

An ideal fuel-to-air ratio for complete combustion

32
Q

What is the main purpose of the engine oil system?

A

To reduce friction between moving parts

33
Q

Which of the following checks before each flight regarding engine oil?

A

Oil level

34
Q

What is the purpose of an oil cooler in an aircraft engine?

A

To cool the oil before it returns to the engine

35
Q

What is ‘compressor stall’ in a jet engine?

A

The disruption of airflow through the compressor causing a loss of compression

36
Q

What is the primary function of an engine fire detection system?

A

To alert the pilot of a potential fire hazard

37
Q

How is the power output of a reciprocating engine typically measured?

A

In horsepower

38
Q

What does ‘TSO’ stand for in aviation maintenance?

A

Technical Standard Order

39
Q

What is the function of a ‘scavenge pump’ in a lubrication system?

A

To return oil to the oil tank from various parts of the engine

40
Q

How does the pilot control the aircraft’s engine power?

A

Using the throttle

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