單項(xiàng)選擇題

In a flash type evaporator, the brine overboard pump is vented directly to the（）

A.saltwater heater shell
B.the condensation of the saltwater feed
C.air ejectors, eductors, or a separate vacuum pump
D.condensation of the distillate

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單項(xiàng)選擇題

In the two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?（）

A.Condenser circulating water pump
B.Feed-water heater drain pump
C.Distillate pump
D.Air ejector condenser drain pump

單項(xiàng)選擇題

The purpose of an oil mist detector in a main propulsion diesel engine is to warn of （）

A.excessive mist density in the crankcases
B.excessively high crankcase vacuum
C.excessively high bearing temperature
D.excessive carbon buildup in the lube oil