Refrigeration and Air Conditioning One of the purposes of sub cooling the liquid refrigerant is to Reduce compressor overheating Reduce compressor discharge temperature Ensure that only liquid and not the vapour enters the expansion (throttling) valve Increase cooling effect Reduce compressor overheating Reduce compressor discharge temperature Ensure that only liquid and not the vapour enters the expansion (throttling) valve Increase cooling effect ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by O.P.)P = ( O.P)R ( O.P.)P = ( ( O.P.)R + 1 ( O.P)R - 1 O.P.)R + 2 O.P)P = ( O.P)P = ( ( O.P.)P = ( O.P)R ( O.P.)P = ( ( O.P.)R + 1 ( O.P)R - 1 O.P.)R + 2 O.P)P = ( O.P)P = ( ( ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In a bootstrap air evaporative cooling system, the evaporator is provided Between the first heat exchanger and the secondary compressor Between the secondary compressor and the second heat exchanger Between the combustion chamber and the first heat exchanger Between the second heat exchanger and the cooling turbine Between the first heat exchanger and the secondary compressor Between the secondary compressor and the second heat exchanger Between the combustion chamber and the first heat exchanger Between the second heat exchanger and the cooling turbine ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning During sensible cooling of air, specific humidity Increases None of the listed here Decreases Remains constant Increases None of the listed here Decreases Remains constant ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be 43833 43834 4 3 43833 43834 4 3 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In which of the following refrigeration system, waste heat can be effectively used? Vapour absorption cycle None of the listed here Air refrigeration cycle Vapour compression cycle Vapour absorption cycle None of the listed here Air refrigeration cycle Vapour compression cycle ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS