单项选择题
A.just below the crankcase B.the oil cup for the exhaust valve C.the pan for collecting drain fuel oil D.oil circulating pump
In a general oil cooler circulated by sea water, the oi...
单项选择题In a general oil cooler circulated by sea water, the oil is at a higher pressure, the result being that any leak in the cooler will mean a loss of （）.
A.oil B.sea water C.air D.fresh water
In a four-stroke engines the camshaft rotates at （）.A.h...
单项选择题In a four-stroke engines the camshaft rotates at （）.
A.half the engine rotational speed B.twice the engine rotational speed C.the engine rotational speed D.four times the engine rotational speed
In a diesel engine, fuel must be broken up into a spray...
单项选择题In a diesel engine, fuel must be broken up into a spray of fine droplets to （）.
A.increase its quality B.obtain complete burning C.reduce its weight D.all of the above
