單項選擇題Early models of the flash-type evaporators used a separate shell-and-tube heat exchanger as the air ejector condenser.More recent models use a combined air ejector condenser with the（）

A.distilling condenser
B.salt water feed heater
C.distillate cooler
D.flash chamber


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題The second stage feed-water temperature and shell absolute pressure in a multistage, flash type, distilling plant is （）

A.higher than the first stage feed-water temperature and absolute shell pressure
B.lower than the first stage feed-water temperature and absolute shell pressure
C.the same as the first stage feed-water temperature and absolute shell pressure
D.not related to the feed-water temperature and absolute shell pressure

2.單項選擇題The efficiency of a flash type evaporator can be increased by（）

A.lowering brine discharge density
B.decreasing the absolute pressure of each stage
C.increasing the saltwater feed heater temperature
D.increasing the pressure at the spray pipe

4.單項選擇題Valve lash, or clearance refers to the （）

A.clearance between the top of the valve stem and the rocker arm
B.compression of the valve springs
C.clearance between the valve seat inserts and the head
D.out of roundness of the fuel injection cams

5.單項選擇題Auxiliary diesel engines can be automatically shut down as a result of （）

A.low lube oil temperature
B.low lube oil pressure
C.high exhaust temperature
D.high cooling water pressure