A.air cooler
B.economizer
C.injector
D.air blower
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A.to pump off
B.being pumped
C.pumping out
D.it pumping out
A.reciprocating pump
B.gear pump
C.centrifugal pump
D.vane pump
A.reciprocating
B.hydraulic
C.turbine
D.vane
A.a level controller
B.a temperature switch
C.a pressure switch
D.a floating ball
A.a hoisting motor
B.a luffing motor
C.a mooring motor
D.a slewing motor
最新試題
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
A pressure drop through the refrigerant liquid line may cause （）.
Which of the following statements is correct concerning heat transfer?（）
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）