单项选择题
A.Sludge B.Gasoline C.Fuel oil D.Lube oil
The amount of fuel delivered by a unit injector is cont...
单项选择题The amount of fuel delivered by a unit injector is controlled by the （）
A.camshaft B.main spring C.rack position D.nozzle orifice size
Cast iron pistons used in large propulsion diesel engin...
单项选择题Cast iron pistons used in large propulsion diesel engines are constructed with （）
A.not taper what so ever B.the skirt being tapered and smaller than the crown C.the skirt being tapered and larger than the crown D.the crown being tapered and smaller than the skirt
The major cause of trouble in a mechanical-hydraulic go...
单项选择题The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by （）
A.dirt B.fuel oil C.governor cooling water D.fuel oil tars
