A.one size larger than the pump discharge nozzle
B.the same size as the pump discharge nozzle
C.one size smaller than the pump discharge nozzle
D.installed with a short radius elbow at the pump
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A.purge the condenser if the waterside is dirty
B.check for proper water flow through the condenser
C.increase the high pressure cutout setting
D.reduce the cooling water flow
A.Red
B.White
C.Blue
D.Yellow
A.the flashing of the feed water
B.the condensation of the saltwater feed
C.air ejectors, eductors, or a separate vacuum pump
D.condensation of the distillate
A.under heavy loads
B.during hot gas defrost
C.under light loads
D.during starting conditions
A.Excessive compression in the cylinder
B.A broken intake valve
C.A dirty inlet filter element
D.An improperly adjusted discharge valve
最新試題
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
The major source of chemical contaminants in hydraulic fluid is （）.
When the steering gear is in operation, you should （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
Which of the following statements is correct concerning heat transfer?（）
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
The output volume of a positive fixed displacement pump can be changed only by （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.