单项选择题
A.low lube oil temperature B.high ambient air temperature C.low tube oil pressure D.high exhaust system back pressure
The minimum speed an engine must attain before ignition...
单项选择题The minimum speed an engine must attain before ignition can occur depends upon （）.
A.the type and size of the engine B.the condition of the engine C.ambient temperature D.all of the above
For a given size engine, the two-stroke/cycle diesel en...
单项选择题For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
A.it has a longer power stroke B.more air gets into the cylinder each stroke C.it develops twice as many power strokes at the same speed D.higher combustion pressure is developed
Lube oil cannot be efficiently filtered if its （）.A.vis...
单项选择题Lube oil cannot be efficiently filtered if its （）.
A.viscosity is too low B.temperature is too low C.pump discharge pressure is higher than the systems pressure D.pump capacity is greater than the systems needs
