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
A. same
B. more
C. less
D. more/less depending on rating
E. unpredictable
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. high triiscibility with oil
B. low boiling point
C. good electrical conductor
D. large latent heat
E. non-inflammable
A. decreases
B. increases
C. remains same
D. depends on other factors
E. none of the above
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
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. reduce compressor overheating
B. reduce compressor discharge temperature
C. increase cooling effect
D. ensure that only liquid and not the vapour enters the expansion (throttling) valve
E. none of the above
A. near critical temperature of refrigerant
B. above critical temperature
C. at critica. temperature
D. much below critical temperature
E. could be anywhere