A.refrigerant pressure in the evaporator
B.cooling water temperature to the condenser
C.heat load in the refrigerator compartment
D.solenoid valve in the liquid line
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A.compressor
B.condenser
C.expansion valve
D.evaporator
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
最新試題
A pressure drop through the refrigerant liquid line may cause （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
Thermostatic expansion valves can be adjusted for （）.
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?（）
One cause of high head pressure occurring in a refrigeration system can be （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
The general purpose of a heat exchanger is to （）.
A grease gun is generally used to lubricate a （）.