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Question # 31

Passage:

“Rotor tips often move near transonic speeds, creating compressibility effects that increase drag.”

What is the implication?

Options:

A.

Drag decreases at high tip speeds.

B.

Compressibility effects limit rotor RPM.

C.

Compressibility improves efficiency.

D.

Tip speeds irrelevant.

Question # 32

What is the primary purpose of the tail rotor?

Options:

A.

Provide forward thrust

B.

Counter main rotor torque

C.

Increase lift

D.

Reduce drag

Question # 33

Why are counterweights used in rotor systems?

Options:

A.

Reduce drag

B.

Balance blades and reduce vibration

C.

Increase torque

D.

Add lift

Question # 34

How does a ballast weight stabilize a ship?

Options:

A.

Raises CG

B.

Lowers CG

C.

Increases drag

D.

Increases torque

Question # 35

Why do some distractors resemble mirror images?

Options:

A.

To test recognition under reflection

B.

To reduce difficulty

C.

To highlight color

D.

To show symmetry only

Viewing question 7 out of 15 questions


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Name Selection Instrument for Flight Training
Code SIFT
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