单项选择题
For most ship engines，the fuel is（）.
A.natural gas
B.diesel oil
C.propane
D.bunker fuel
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相关考题
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单项选择题
Diesel engines obtain combustion air through turbo chargers，blowers，or（）.
A.air starters
B.carburetors
C.natural aspiration
D.air receivers -
单项选择题
Diesel engines are considered safer than gasoline engines because（）.
A.they are more heavily built
B.the fuel used is less volatile
C.they can be easily reversed
D.they operate at a lower speed -
单项选择题
Before starting any diesel or gasoline engine，which of the following must be checked? （）
A.Oil level
B.Flow of cooling water
C.Exhaust discharge
D.All of the above
