单项选择题
In any diesel engine closed freshwater cooling system, the lowest pressure exists at the （）.
A.jacket water outlet
B.cooling water pump outlet
C.heat exchanger outlet
D.expansion tank atmospheric vent
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相关考题
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单项选择题
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 -
单项选择题
The bearings used to support the crankshaft are generally called （）
A.line shaft bearings
B.connecting rod beatings
C.main bearings
D.support bearings -
单项选择题
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
