单项选择题
A.allow filtration of less viscous oil B.decrease the pressure drop across the filter C.improve overall filtration D.all of the above
The bearings used to support the crankshaft are general...
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
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
