單項選擇題Generally the function of lubrication is to form of a film of lubricant between any two surfaces that have relative （）, so that surfaces dont get touch with each other.
A.gravity
B.motion
C.ratio
D.density
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1.單項選擇題Fuels of high quality with their earlier ignitions will cause higher （）pressure in cylinders of a diesel engine.
A.compression
B.maximum
C.rated
D.oil
2.單項選擇題Fuel pump index is （）.
A.the viscosity index
B.the fuel oil contents
C.the starting speed
D.the reading at the rack
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A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
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Routine monitoring of a diesel engine should include （）.
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Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）
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A thrust bearing is used with a propulsion diesel engine to （）.
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An automated diesel engine should normally shut down due to （）
題型：單項選擇題