A.one size smaller than the pump suction nozzle
B.the same size as the pump suction nozzle
C.one size larger than the pump suction nozzle
D.installed with a short radius elbow at the pump
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A.first stage flash chamber
B.second stage flash chamber
C.first stage after condenser
D.second stage distilling condenser
A.system is low on refrigerant
B.high pressure cutout switch is improperly adjusted
C.discharge valves are leaking slightly
D.discharge valves are leaking excessively
A.leaky discharge valves on the LP cylinder
B.leaky discharge valves on the HP cylinder
C.insufficient intercooler cooling
D.low ambient air pressure
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
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
最新試題
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
When the steering gear is in operation, you should （）.
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?（）
A grease gun is generally used to lubricate a （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
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 （）.
One cause of high head pressure occurring in a refrigeration system can be （）.