A.Overcoming sliding friction
B.Overcoming rolling friction
C.Overcoming fluid friction
D.Overcoming oil wedge friction
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A.weight designation
B.viscosity index
C.pour point
D.thermal change value
A.fusion
B.vaporization
C.condensation
D.sublimation
A.capability of causing brittle fractures
B.highly corrosive action on mild steel
C.vapor cloud which reacts violently with saltwater
D.toxicity at atmospheric pressure
A.passing it through the expansion valve
B.condensing refrigerant in the system condenser
C.passing the gaseous refrigerant through the heat interchanger on the suction side of the compressor
D.maintaining a high pressure on the systems receiver
A.compressor
B.condenser
C.receiver
D.evaporator
最新試題
The major source of chemical contaminants in hydraulic fluid is ().
If the head pressure of a reciprocating refrigeration compressor is excessive, ().
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will ().
A salinity indicator is used to determine the ().
Which of the listed pumps is NOT a positive displacement pump?()
A salinity indicator is used to determine the ().
The rate of heat transfer from a hot region to a cold region is affected most by the ().
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by ().
If the suction pressure at the refrigeration compressor is below normal, the cause can be().