问题：
[单选] For most ship engines，the fuel is（）.
natural gas。diesel oil。propane。bunker fuel。
问题：
[单选] Generally speaking，the fuel injected into a marine diesel engine combustion chamber is ignited by（）.
spark plugs。glow plugs。heat of compression。a magneto。
问题：
[单选] How does combustion air enter the cylinder of a two-cycle diesel engine?（）
Cylinder head valves。Ports。Turbo chargers。Bleeder valve。
问题：
[单选] How should you warm up a diesel engine that has not been run for some time? （）
Run it at minimum speed for a period of time。Run it at half speed for a period of time。Bring it to top speed immediately。Inject ether into the air intake。
问题：
[单选] How would the exhaust of a properly operating diesel engine appear?（）.
Light blue haze。Light brown haze。Light gray haze。Perfectly clear。
问题：
[单选] 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 pawl，forced by a spring mechanism，will engage the teeth of the bull gear and hold the load。An electromagnetic brake will hold the load where it is suspended。The load will fall rapidly to the deck unless the foot brake is engaged。The load will slowly lower to the deck under control of the drag of the winch motor。
问题：
[单选] If ignited，which material would be a class B fire?（）
Magnesium。Paper。Wood。Diesel Oil。
问题：
[单选] If you are unable to stop a diesel engine by any other means，you should（）.
discharge a CO2 extinguisher in the air inlet。pull off the distributor cap。secure the jacket water。secure the starting air supply valve。
问题：
[单选] If your propeller is racing in rough weather，you should（）.
decrease your engine speed。ignore it。increase your engine speed。stop your engine until the rough weather passe。
问题：
[单选] Lubricating oil should be changed on a heavy duty diesel engine when（）.
it gets dark in color。a sample rubbed between fingers feels thin。it has been in use for a specified interval。it no longer supports combustio。
