A.compressor
B.condenser
C.expansion valve
D.evaporator
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A.bimetallic type
B.diaphragm type
C.bourdon tube type
D.resistance-temperature type
A.evaporator coils
B.liquid strainer
C.compressor
D.condenser
A.suction side of a bilge pump
B.exhaust manifold of an auxiliary diesel
C.discharge line from an air compressor
D.chemical feed tank of an evaporator
A.They should always be started with the discharge valve closed
B.They should always be started with the discharge valve opened
C.A priming pump is always required to flood the impeller suction
D.They should always be started with the sealing line valves closed
A.compressor damage from improper lubrication
B.refrigerant absorption by the lubricant
C.increased viscosity in the lubricant
D.carbon deposit on the compressor suction valves
A.Spring-centered valve
B.Unloading valve
C.Three-position valve
D.Two-position valve
A.Expansion valve
B.Condenser
C.Evaporator
D.Compressor
A.The condenser and the expansion valve
B.The king valve and the solenoid valve
C.The compressor and the expansion valve
D.The condenser and the solenoid valve
A.temperature and pressure
B.humidity and temperature
C.pressure and vacuum
D.pressure and humidity
A.capacity of 0%
B.efficiency of 100%
C.internal slippage of 0%
D.shut off horsepower rating of 100%
最新试题
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will ().
When the steering gear is in operation, you should ().
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by ().
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by ().
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its ().
An excessive charge of refrigerant in an air-cooled refrigeration system can cause ().
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
One cause of high head pressure occurring in a refrigeration system can be ().
The major source of chemical contaminants in hydraulic fluid is ().
If the suction pressure at the refrigeration compressor is below normal, the cause can be().