单项选择题
A.lubrication B.injection C.cooling D.combustion
The （） of the lubricant should be sufficient to hold th...
单项选择题The （） of the lubricant should be sufficient to hold the film together, but it should allow the lubricant to flow easily.
A.specific gravity B.viscosity C.acid value D.calorific value
The （） of the diesel oil must not exceed 120 degree Fah...
单项选择题The （） of the diesel oil must not exceed 120 degree Fahrenheit.
A.temperature B.pressure C.acid value D.viscosity
The （） is not properly set thus causing either advanced...
单项选择题The （） is not properly set thus causing either advanced or retarded firing.
A.piston B.fuel injection pump C.crankshaft D.oil can
