Category: Refrigeration and Air Conditioning

A. Temperature of medium being cooled must be below that of the evaporator
B. Refrigerant leaves the condenser as liquid
C. All solar thermally operated absorption systems are capable only of intermittent operation
D. frost on evaporator reduces heat transfer
E. refrigerant is circulated in a refrigeration system to transfer heat

A. more
B. less
C. same
D. more/less depending on size of plant
E. unpredictable

A. increases COP
B. decreases COP
C. COP remains unaltered
D. other factors decide COP
E. unpredictable

Pick up the wrong statement ?
A. Tow specific heat of liquid
B. high boiling point
C. high latent heat of vaporisation
D. higher critical temperature
E. low specific volume of vapour

A. 210 kJ/min
B. 21 kJ/min
C. 420 kJ/min
D. 840 kJ/min
E. 105 kJ/min

A. pressure lines
B. temperature lines
C. total heat lines
D. entropy lines
E. volume lines

A. it permits higher speeds to be used
B. it permits complete evaporation in the evaporator
C. it results in high volumetirc and mechanical efficiency
D. all of the above
E. none of the above

A. water at 0°C
B. ice at – 4°C
C. solid and dry ice
D. mixture of ice, water and vapour under equilibrium conditions under NTP conditions
E. mixture of ice and water Under equilibrium conditions

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

A. 1 : 1
B. 1 : 9
C. 9 : 1
D. 1 : 3
E. 3 : 1