单项选择题

If you are unable to stop a diesel engine by any other means，you should（）.

A.discharge a CO₂ extinguisher in the air inlet
B.pull off the distributor cap
C.secure the jacket water
D.secure the starting air supply valve

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单项选择题

If ignited，which material would be a class B fire?（）

A.Magnesium
B.Paper
C.Wood
D.Diesel Oil

单项选择题

If an electric cargo winch is being used to lift a draft of cargo and the engine room loses all power，which will occur?（）

A.A pawl，forced by a spring mechanism，will engage the teeth of the bull gear and hold the load
B.An electromagnetic brake will hold the load where it is suspended
C.The load will fall rapidly to the deck unless the foot brake is engaged
D.The load will slowly lower to the deck under control of the drag of the winch motor

单项选择题

How would the exhaust of a properly operating diesel engine appear?（）.

A.Light blue haze
B.Light brown haze
C.Light gray haze
D.Perfectly clear