The ship has a diesel engine（）a superc

1、The crankcase of many diesel engines a

The crankcase of many diesel engines are kept under a slight vacuum by the （）.Ascavenging action of the pistonBpiston type vacuum pump taking suction off a differential manometerCgland exhausting manometerDcrankcase exhaust fa

2、If a diesel engine has been stopped be

If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase（）Ainspection covers should not be opene...

3、For a main diesel engine the lube oil

For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.Aa gravity tankBa sumpCa vesselDa bottle

4、The highest pressure in a diesel engin

The highest pressure in a diesel engine cylinder normally occurs （）.Aat TDCBbefore TDCCafter TDCDduring air starting

5、The exhaust system of a diesel engine

The exhaust system of a diesel engine is usually designed to remove exhaust gases and to （）Aprovide exhaust back pressureBprevent exhaust smoke emissionsCpower a reciprocating superchargerDmuffle exhaust gas noise

6、The intake valves in a diesel engine a

The intake valves in a diesel engine are reseated by （）.Acam followersBpush rodsCcombustion gasesDvalve spring