Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）

[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]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]If you are unable to stop a diesel engine by any other means，you should（）.A . discharge a CO2 extinguisher in the air inletB . pull off the distributor capC . secure the jacket waterD . secure the starting air supply valve

[单选题]Directional intake ports in diesel engines are used to （）.A . reduce air charge turbulenceB . induce air swirlC . deflect hot combustion gas away from the valvesD . oppose the effects of piston induced squish

[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]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]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