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單項(xiàng)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

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單項(xiàng)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

單項(xiàng)選擇題

The highest pressure in any closed diesel engine freshwater cooling system is at the （）.

A.jacket water outlet
B.expansion tank inlet
C.heat exchanger inlet
D.cooling water pump outlet

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