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2AX5X > Vol.3 > Flashcards

Vol.3 Flashcards

1
Q

What is the resistance of an object to change its motion called?

A

Inertia

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2
Q

What is the definition of the ability to do work?

A

Energy

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3
Q

Which of Newton’s laws is an aircraft taxiing at a constant speed an example of?

A

Newton’s First Law of Motion

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4
Q

Which of Newton’s Laws of Motion is the best description of why an operating jet engine produces forward thrust?

A

Newton’s Third Law of Motion

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5
Q

In a jet engine, what meters the fuel for combustion?

A

Fuel control

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6
Q

When the turbine wheel absorbs the fuel energy, where does the energy go?

A

the energy returns to the compressor

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7
Q

What effect does the divergent design of a jet engine diffuser have on pressure?

A

Increases pressure

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8
Q

What does the air and gases flowing through a jet engine require?

A

Greater velocity exiting than entering

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9
Q

When a jet engine uses two or more turbine wheels, what is placed directly in front of each turbine wheel?

A

Nozzle diaphragm

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10
Q

What does a jet engine derive its name from?

A

The fact that it uses a exhaust-gas-driven turbine wheel to drive its compressor

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11
Q

What are the two types of jet engine compressors?

A

Centrifugal and axial-flow

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12
Q

After air is drawn into the guide vanes of a centrifugal jet engine compressor, what is the air subjected to?

A

Centrifugal and rotational forces

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13
Q

What determines the N2 compressor RPM of a dual-spool jet engine compressor?

A

Fuel control

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14
Q

What is the purpose of the front-mounted fan in an axial-flow jet engine compressor?

A

Increase thrust and send air through the compressor core rotor

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15
Q

What is the combustion efficiency of a gas turbine usually between?

A

95% and 100%

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16
Q

How does engine design help prevent igniter plug fouling?

A

By directing air around the plug electrode

17
Q

What forms the inner and outer surfaces of an annular-type combustion chamber?

A

Interlocking stainless steel bands

18
Q

What happens to the fuel that accumulates after a failed start or after engine shutdown?

A

It is drained overboard by a drain system

19
Q

What are the three turbine designs used in jet engines?

A

Impulse, reaction, and reaction-impulse

20
Q

On some jet engines, what secures the turbine bucket in place?

A

Lockstrips

21
Q

The exhaust duct connects the turbine outlet and what?

A

Jet nozzle

22
Q

What is the purpose of the exhaust duct?

A

To straighten exhaust-gas flow

23
Q

What is one common type of variable-area orifice used on augmenters?

A

Segmented flap

24
Q

What augmenter component creates local turbulence and reduces gas velocity?

A

Flameholder

25
Q

Which engine type used a lot during the early years of jet engine design is the most basic turbine engine design?

A

Turbojet

26
Q

What is a turbofan engine with a bypass ratio of 3:1 classified as?

A

Medium bypass

2AX5X (13 decks)

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