A . allow filtration of less viscous oil
B . decrease the pressure drop across the filter
C . improve overall filtration
D . all of the above
[单选题]The lubricating system for the cylinder walls is different from the bearings in that the oil for former one is supplied in () while that for latter one is ().A . sufficient quantity; measuredB . measured quantity;sufficientC . excessive quantity;suff
[单选题]The function of a lubricating oil is () to lubricate the running surface () to carry away a great deal of heat.A . not;butB . neither;norC . either;orD . not only;but also
[单选题]Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an _____.A.over-speed tripB.audible/visual alarmC.the ships/boats general alarmD.reserve oil storage tank
[单选题]The ability of lubricating oils to resist viscosity changes during temperature changes is indicated by the ____.A.American PetroleumB.Institute number viscosity index numberC.Seconds Saybolt Furol numberD.Seconds Saybolt Universal number
[单选题]Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an ().A . overspeed tripB . audible/visual alarmC . the ships/boats general alarmD . reserve oil storage tank
[单选题]Lubricating oil is supplied to the crank-pin bearings in a marine diesel engine by ().A . internal crankshaft passagesB . immersion in oilC . splash lubricationD . injection lubricatio
[单选题]Lubricating systems for diesel engines are usually designed to initially provide lube oil to the engine ()A . camshaft beatingsB . main bearingsC . piston crownsD . cylinder wall
[单选题]There should be a lubricating oil () between the main beatings and the crankshaft.A . filmB . capC . lacquerD . shell
[单选题]The remaining oil in the lubricating pipes and ducts should be blown out with ().A . atmosphereB . the fresh waterC . compressed airD . chemical compound
[单选题]The selection of a lubricating oil depends to a great extent on the operating conditions,().A . the type of coolantB . the design of the engineC . the type of fuel to be burnedD . B and C