單項(xiàng)選擇題

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

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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