单项选择题
A.fuel must be preheated B.intake air should be preheated C.lube oil outlet temperature should be increased 20℃ above normal D.none of the above
Excessive diesel engine back pressure may be an indicat...
单项选择题Excessive diesel engine back pressure may be an indication of （）
A.carbon buildup in the exhaust manifold B.overcooling of the exhaust manifold C.eroded muffler baffle plates D.high injection pressure
A possible cause for an individual piston to knock when...
单项选择题A possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to （）
A.early fuel injection B.excessive bearing play within the running gear C.overloading of the cylinder D.all of the above
In a diesel engine, the time taken to heat the fuel par...
单项选择题In a diesel engine, the time taken to heat the fuel particles, turn them into vapor, and bring about combustion is called （）
A.injection lag B.ignition delay C.compression D.turbulence lag
