單項(xiàng)選擇題

Cold weather starting of a diesel engine may be made easier by（）

A.decreasing the compression ratio
B.using a special fuel having a high ignition temperature
C.increasing the starting air supply
D.heating the jacket water

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單項(xiàng)選擇題

Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （）

A.increasing the quantity of starting air
B.increasing the lube oil pressure
C.heating the engine fuel supply
D.heating the engine coolant

單項(xiàng)選擇題

The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?（）

A.Faulty thermostatic bypass valve
B.Eroded zinc pencils in the heat exchanger
C.Steam formation in the expansion tank
D.Excessive leakage from jacket water pump seal