單項選擇題

Valve cages are used on some large diesel engines to （）

A.reduce wear on the valve stem
B.permit the use of alloy valve seat materials
C.reduce heat transfer from the valve seat
D.facilitate valve removal for servicing

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單項選擇題

If the jacket water temperature rises rapidly above normal in a diesel engine, you should FIRST （）

A.place standby cooler in operation
B.reduce engine load
C.check thermostatic valve
D.clean sea water strainer

單項選擇題

Which of the following conditions can cause excessive lube oil consumption in a diesel engine?（）

A.Low lube oil temperature
B.Dirty lube oil strainer
C.Low lube oil pressure
D.High lube oil temperature