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.Management Sciences
Category: Refrigeration and Air Conditioning
The moisture in a refrigerant is removed by___________________?
A. evaporator
B. safety relief valve
C. dehumidifier
D. driers
E. expansion valve
In vapour compression cycle using NH3 as refrigerant, initial charge is filled at_________________?
A. suction of compressor
B. delivery of compressor
C. high pressure side close to receiver
D. low pressure side near receiver
E. anywhere in the cycle
Presence of moisture in a refrigerant affects the working of___________________?
A. compressor
B. condenser
C. evaparator
D. expansion valve
E. heat transfer
Accumulators should have adequate volume to store refrigerant charge at least_________________?
A. 10%
B. 25%
C. 50%
D. 75%
E. 100%
The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P_____________________?
A. more
B. less
C. equally.
D. unpredictable
E. none of the above
In vapour compression cycle the condition of refrigerant is superheated vapour _____________________?
A. after passing through the condenser
B. before passing through the condenser
C. after passing through the expansion or throttle valve
D. before [entering the expansion valve
E. before entering the compressor
In a refrigeration cycle, the flow of refrigerant is controlled by___________________?
A. compressor
B. condenser
C. evaporator
D. expansion valve
E. all of the above
Air refrigeration cycle is used in ____________________?
A. domestic refrigerators
B. commercial refrigerators
C. air conditioning
D. gas liquefaction
E. such a cycle does not exist
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases ____________________ ?
A. will be higher
B. will be lower
C. will remain unaffected
D. may be higher or lower depending upon the nature of non-condensable gases
E. unpredictable
Ammonia is __________________?
A. non-toxic
B. non-inflammable
C. toxic and non-inflammable
D. highly toxic and inflammable
E. none of the above
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