單項選擇題

One cause of diesel engine surging can be a result of （）

A.injection pump plungers stuck or worn
B.low compression
C.solenoid stuck open
D.fuel tank too full

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Cooling water pumps driven by direct reversing diesel engines are usually of the straight impeller vane type pump with a concentric housing to（）

A.facilitate bi-directional operation
B.provide the greatest pump efficiency
C.prevent pump clogging from marine growth
D.prevent cavitation at the pump outlet

單項選擇題

In a diesel engine cooling system, the high temperature alarm contact maker will be activated on excessively high water discharge temperature from the （）

A.raw water pump discharge
B.expansion tank outlet
C.cooling water heat exchanger
D.outlet engine jacket water outlet