单项选择题
A.line shaft bearings B.connecting rod beatings C.main bearings D.support bearings
Improper maintenance of an automatic auxiliary boiler o...
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
The highest pressure in any closed diesel engine freshw...
单项选择题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
The lube oil cooler is located after the lube oil filte...
单项选择题The lube oil cooler is located after the lube oil filter in order for （）
A.the filter to operate more efficiently B.the lube oil cooler to be bypassed C.positive lube oil pump suction to be assured D.galvanic action in the cooler to be minimized
