單項選擇題

A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.

A.double-acting engine
B.opposed pistons engine
C.single-acting engine
D.horizontal acting engine

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單項選擇題

An increased pressure differential between the inlet and outlet of a strainer usually indicates the strainer is （）

A.holed
B.fouled
C.clean
D.dry

單項選擇題

Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?（）

A.Defective temperature controls in the system
B.Cavitation in the cooling water pump
C.Opened vent in the cooling system
D.Restricted water passages in the engine