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
单项选择题 If ignited，which material would be a class B fire?（）
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?（）
单项选择题 How would the exhaust of a properly operating diesel engine appear?（）.
