单项选择题
In a marine diesel engine the oil sump is （）.
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
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相关考题
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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 -
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 -
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
