單項選擇題

The sensible heat of air is dependent upon the （）.

A.dry bulb temperature
B.wet bulb temperature
C.saturation temperature
D.water vapor superheat

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單項選擇題

Which of the devices listed, when used on an electro-hydraulic steering gear, keeps the movement of the redder closely in step with the steering wheel?（）

A.The follow-up gear
B.The rudder angle indicator
C.The synchronous electric transmitter
D.A rudder angle limit switch

單項選擇題

Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed （）.

A.apparent slip
B.tree slip
C.pitch
D.propulsive efficiency

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