單項選擇題

The lower section of a piston is called the （）.

A.land
B.skirt
C.crown
D.plate

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單項選擇題

To correct a hunting problem in a main propulsion diesel engine hydraulic governor, you should （）.

A.increase the governor oil pressure
B.adjust the speed droop setting
C.adjust the speeder spring travel
D.adjust the compensating needle valve

單項選擇題

The （） engine is used for alternators and sometimes for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm.

A.four-stroke
B.two-stroke
C.slow speed
D.reversible

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