单项选择题
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
In a complete oil/water separator, more oil will separa...
单项选择题In a complete oil/water separator, more oil will separate out onto the underside of these plates and travel outwards until it is free to rise into the oil collecting space Whats the meaning of "it" in the sentence above?（）
A.a separator B.oil C.water D.an oil collecting space
In a commonly used fuel oil system, the oil is stored i...
单项选择题In a commonly used fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.
A.a service tank B.a settling tank C.an expansion tank D.a double bottom tank
