單項(xiàng)選擇題When distilling sea water the cooling water discharging from the distiller is fed back to evaporator as feed water ().

A.to decrease scale formation
B.for better cooling effect
C.for more economical purpose
D.to raise vacuum


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題In a vacuum boiling evaporator, the fresh water generated is pumped out by ().

A.a brine pump
B.an air ejector
C.a feed water pump
D.a condensate pump

2.單項(xiàng)選擇題With a vacuum boiling evaporator, the remainder of sea water fed to the evaporator is pumped out by ().

A.a brine pump
B.an air ejector
C.a feed pump
D.distillate pump

4.單項(xiàng)選擇題() is the production of pure water from sea water by evaporation and re-condensing.

A.Evaporation
B.Circulation
C.Condensation
D.Distillation

5.單項(xiàng)選擇題Which of the following can be used in hydraulic transmission system?()

A.Hydraulic oil
B.Animal oil
C.Light oil
D.Fuel oil