A. more
B. less
C. same
D. more for small capacity and less for high capacity
E. less for small capacity and more for high capacity
A. results in loss of heat due to poor heat transfer
B. increases heat transfer rate
C. is immaterial
D. can be avoided by proper design
E. decreases compressor power
Formation of frost on evaporator in refrigerator ________________? Read More »
Refrigeration and Air Conditioning A. decreases
B. increases
C. remains same
D. depends on other factors
E. none of the above
A. high triiscibility with oil
B. low boiling point
C. good electrical conductor
D. large latent heat
E. non-inflammable
Which of the following is not a desirable property of a refrigerant_________________? Read More »
Refrigeration and Air Conditioning A. strong solution to weak solution
B. weak solution to strong solution
C. strong solution to ammonia vapour
D. ammonia vapour to weak solution
E. ammonia vapour to strong solution
A. same
B. more
C. less
D. more/less depending on rating
E. unpredictable
A. critical pressure of refrigerant
B. much below critical pressure
C. much above critical pressure
D. near critical pressure
E. there is no such restriction
Highest pressure encountered in a refrigeration system should be________________? Read More »
Refrigeration and Air Conditioning A. Ammonia
B. Carbon dioxide
C. Freon
D. Brine
E. Hydrocarbon refrigerant
A. condenser
B. evaporator
C. compressor
D. expansion valve
E. receiver
Where does the lowest temperature occur in a vapour compression cycle ? Read More »
Refrigeration and Air Conditioning A. 1 : 1
B. 1 : 9
C. 9 : 1
D. 1 : 3
E. 3 : 1
