A.expansion valve to the compressor
B.receiver to the expansion coil
C.expansion valve to the evaporator
D.condenser to the expansion valve
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A.leaking unloader
B.tripped circuit breaker
C.control line leak
D.defective pop valve
A.superheated
B.saturated
C.dense
D.flooded
A.a separate air ejector unit
B.a direct unimpeded connection between second stage and salt water feed heater
C.either by vacuum drag or an external line from the first stage via a fixed orifice
D.the fixed orifice provided in the steam supply line
A.Expansion valve
B.Evaporator
C.Drier
D.Receiver
A.using a slightly dirty air filter
B.using oil having an excessive viscosity
C.intercooler or after-cooler leaks
D.carrying the oil level higher than normal
最新試題
A salinity indicator is used to determine the （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
A grease gun is generally used to lubricate a （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
The output volume of a positive fixed displacement pump can be changed only 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?（）
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.