單項選擇題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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1.單項選擇題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

2.單項選擇題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

3.單項選擇題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

4.單項選擇題For most ship engines,the fuel is().

A.natural gas
B.diesel oil
C.propane
D.bunker fuel

5.單項選擇題Diesel engines obtain combustion air through turbo chargers,blowers,or().

A.air starters
B.carburetors
C.natural aspiration
D.air receivers