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
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相关考题
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单项选择题
How should you warm up a diesel engine that has not been run for some time? （）
A.Run it at minimum speed for a period of time
B.Run it at half speed for a period of time
C.Bring it to top speed immediately
D.Inject ether into the air intake -
单项选择题
How does combustion air enter the cylinder of a two-cycle diesel engine?（）
A.Cylinder head valves
B.Ports
C.Turbo chargers
D.Bleeder valves -
单项选择题
Generally speaking，the fuel injected into a marine diesel engine combustion chamber is ignited by（）.
A.spark plugs
B.glow plugs
C.heat of compression
D.a magneto
