更多"Insufficient refrigerant in a refri"的相关试题:
[单项选择]In a refrigeration system, the refrigerant absorbs the latent heat of vaporization in the（）.
A. compressor
B. condenser
C. receiver
D. evaporator
[单项选择]In a compression refrigeration plant the refrigerant flows from the expansion valve and through the （） where it absorbs heat from the space being cooled and becomes a gas or vapor.
A. compressor
B. condenser
C. throttle valve
D. evaporator
[单项选择]Refrigerant is circulated through a refrigeration system by the （）.
A. compressor
B. condenser
C. expansion valve
D. evaporator
[单项选择]Air that may enter a refrigeration plant tends to collect in the （）.
A. upper part of the receiver
B. upper part of the condenser
C. down stream end of the cooling coil
D. outlet end of the condenser
[单项选择]In a compression refrigeration plant the hot, high pressure refrigerant gas is cooled by the sea water and becomes liquid in the （）.
A. compressor
B. condenser
C. throttle valve
D. evaporator
[单项选择]The function of （） in a refrigeration plant using Freon is to move moisture from all refrigeration system.
A. filter
B. filter drier
C. heat exchanger
D. air cooler
[单项选择]In a refrigeration plant the （） need defrosting.
A. fan
B. compressor
C. condenser
D. evaporator
[单项选择]Refrigeration system compressor crankcase sweating is an indication of （）.
A. insufficient lube oil circulating through the system
B. excessive circulation of lube oil through the system
C. insufficient refrigerant in the system
D. an overworked compressor
[单项选择]Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid lineIf excess moisture is present in the system, the indicator will （）
A. activate the driers
B. change color
C. secure the compressor
D. add a predetermined amount of liquid drier
[单项选择]Badly leaking refrigeration compressor discharge valves will cause（）.
A. overfeeding of the expansion valve
B. damage to the condenser
C. constant running of the compressor
D. flooding of the receiver
[单项选择]A refrigeration system contaminated with moisture can be affected by （）.
A. acid formation
B. sludge formation
C. ice in the expansion valve
D. All of the above
[单项选择]The saturation temperature of the refrigerant must be （） that required in the evaporator refrigerated space.
A. above
B. below
C. equal to
D. None of the above
[单项选择]If liquid refrigerant accidentally comes in contact with the eyes, （） immediately.
A. rub the eyes
B. irritate the eyes
C. wash the eyes with a heavy boric acid solution
D. obtain medical help
[单项选择]The boiling and condensation points of refrigerant mainly depend on the （） exerted upon it.
A. temperature
B. density
C. volume
D. pressure
[单项选择]Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
A. Sub-cooled liquid
B. Sub-cooled vapor
C. Superheated vapor
D. Liquid
[单项选择]A refrigeration system compressor crankcase is sweating or unusually coldThis is an indication of（）.
A. a shortage of refrigerant in the system
B. air in the system
C. an accumulation of liquid refrigerant in the crankcase
D. a shortage of oil in the crankcase
[单项选择]Which of the listed refrigeration system components keeps the refrigerant circulating through the system?（）
A. Expansion valve
B. Condenser
C. Evaporator
D. Compressor
