The oil index of main engine should be controlled to prevent it from ____ in heavy weather.

A．over heat

B．over speed

C．over pressure

D．over worn

[单选题]For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.A . a gravity tankB . a sumpC . a vesselD . a bottle

[单选题]Lubricating oil for an engine is stored at the bottom of the （）, known as the sump or in a drain tank located beneath the engine.A . sea cheatB . air receiverC . crankcaseD . water box

[单选题]Engine fuel pump index is （）.A . the viscosity indexB . the fuel oil contentsC . the starting speedD . the reading at the rack

[单选题]Friction, engine wear and oil consumption in a diesel engine are directly related to the （）.A . acidity of the oilB . pour point of the oilC . flash point of the oilD . viscosity of the oil

[单选题]The fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the （） systems.A . fuel treatmentB . fuel combustionC . fuel injectionD . fuel separating

[单选题]There should be a lubricating oil （） between the main beatings and the crankshaft.A . filmB . capC . lacquerD . shell

[单选题]A dirty diesel engine oil filter element can best be detected by （）.A . visual inspection of the elementsB . the pressure drop across the filterC . high lube oil sump temperatureD . decrease in oil viscosity from the filter

[单选题]In a diesel engine lube oil system, which of the following parts should be lubricated first?（）A . Camshaft beatingsB . Main bearingsC . Piston crownsD . Cylinder wall

[单选题]Lubricating oil should be changed on a heavy duty diesel engine when（）.A . it gets dark in colorB . a sample rubbed between fingers feels thinC . it has been in use for a specified intervalD . it no longer supports combustio

[单选题]The bridge should inform the engine room______before passing through congested or shallow waterway.A．24 hoursB．2 hoursC．1 hourD．15 minutes