單項(xiàng)選擇題

Diesel engine jacket water is used in the distillation process as the （）.

A.coolant for the distillate
B.coolant for the brine cooler
C.means of heating the feedwater
D.primary means of producing a vacuum within the distiller

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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

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