单项选择题
A.Light blue haze B.Light brown haze C.Light gray haze D.Perfectly clear
How should you warm up a diesel engine that has not bee...
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
How does combustion air enter the cylinder of a two-cyc...
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
Generally speaking，the fuel injected into a marine dies...
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
