单项选择题
If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase（）
A.inspection covers should not be opened until the engine has cooled
B.ventilation system should be continued in operation for one hour for cooling
C.scavenge pump should be immediately secured to prevent loss of lube oil
D.explosion covers should be opened slightly to provide extra ventilation
相关考题
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单项选择题
The desirable properties of a marine fuel oil should include（）
A.high flash point and high viscosity
B.low flash point and high viscosity
C.low heating value and high sulphur content
D.high heating value and low sulphur content -
单项选择题
If the turbocharger failed on an auxiliary diesel engine, which of the following conditions would probably occur?（）
A.Full power cannot be developed
B.The exhaust will contain black smoke
C.Complete combustion will be impossible
D.All of the above -
单项选择题
If a crankcase explosion occurs in a diesel engine, you should stop the engine and（）
A.immediately open all crankcase relief ports
B.increase crankcase exhauster speed to draw cool air into the engine
C.allow the engine to cool naturally
D.increase crank case scavenge air to remove unburned gases
