單項(xiàng)選擇題

The replacement piping for diesel engine high pressure fuel systems must be the same length and diameter as the original piping to （）.

A.avoid unnecessary pints inventory
B.keep torsional vibration constant
C.use existing supports and braces
D.maintain specified injection characteristics

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單項(xiàng)選擇題

Friction, engine wear and oil consumption in a diesel engine are directly related to the （）.

A.acidity of the oil
B.pour point of the oil
C.flash point of the oil
D.viscosity of the oil

單項(xiàng)選擇題

Two important considerations for the proper lubrication of a diesel engine include the delivery of the oil in sufficient amount and the （）.

A.cetane number
B.pour point
C.viscosity temperature
D.quality of the oil