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


您可能感興趣的試卷

你可能感興趣的試題

2.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

3.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

4.單項選擇題Which of the listed conditions can cause a diesel engine to use too much lube oil?()

A.Dirty lube oil filter
B.Too much piston ring wear
C.High lube oil viscosity
D.Low lube oil temperature

5.單項選擇題Which of the following operational conditions will occur to the diesel engine lube oil at extremely high temperature?()

A.The oil oxidizes and forms carbon deposits
B.The viscosity increases
C.Engine oil consumption decreases
D.Lubricating qualities of the oil are enhanced