單項選擇題

The difference between Fixed pitch propeller (FPP) and Controllable pitch propeller (CPP) is in that（）

A.for FP, once fitted, the position of the blades can also be changed in operation
B.for CP, once fitted, the position of the blades can also be changed in operation
C.the CP type has a relatively smaller hub compared with the FP propellers
D.the FP type has a relatively larger hub compared with the CP propellers

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單項選擇題

The propeller consists of a （）with several blades of helicoidal form attached to it.

A.shaft
B.boss
C.wheel
D.lever

單項選擇題

Oil pressure in the lubrication system is（）than the static sea water head to ensure that sea water cannot enter the sterntube in the event of seal failure.

A.higher
B.lower
C.very higher
D.very lower

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The difference between Fixed pitch propeller (FPP) and Controllable pitch propeller (CPP) is in that（）

你可能感興趣的試題

The propeller consists of a （）with several blades of helicoidal form attached to it.

Oil pressure in the lubrication system is（）than the static sea water head to ensure that sea water cannot enter the sterntube in the event of seal failure.