单项选择题
In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the （）
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
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相关考题
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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 -
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 -
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
