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單項選擇題

With respect to the flow of lubricating oil through a diesel engine, the lube oil coolers are located after filters in order to （）.

A.allow filtration of less viscous oil
B.decrease the pressure drop across the filter
C.improve overall filtration
D.all of the above

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單項選擇題

The bearings used to support the crankshaft are generally called （）

A.line shaft bearings
B.connecting rod beatings
C.main bearings
D.support bearings

單項選擇題

Improper maintenance of an automatic auxiliary boiler oil burner could result in （）.

A.fuel pump failure
B.fan motor failure
C.increased feedwater consumption
D.decreased boiler efficiency