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 3 43834 4 43833 3 43834 4 43833 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will Remain unaffected May increase or decrease depending on the type of refrigerant used Increase Decrease Remain unaffected May increase or decrease depending on the type of refrigerant used Increase Decrease ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since These react with ozone layer These react with water vapour and cause acid rain These react with plants and cause greenhouse effect These react with oxygen and cause its depletion These react with ozone layer These react with water vapour and cause acid rain These react with plants and cause greenhouse effect These react with oxygen and cause its depletion ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The temperature of ammonia after compression in a vapour compression system is None of these 70 to 110°C 50 to 70°C 20 to 50°C None of these 70 to 110°C 50 to 70°C 20 to 50°C ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Reducing suction pressure in refrigeration cycle Lowers compressor capacity because vapour is lighter All of these Lowers evaporation temperature Increases power required per ton of refrigeration Lowers compressor capacity because vapour is lighter All of these Lowers evaporation temperature Increases power required per ton of refrigeration ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following is not a desirable property of a refrigerant? Good electrical conductor Large latent heat High risibility with oil Low boiling point Good electrical conductor Large latent heat High risibility with oil Low boiling point ANSWER DOWNLOAD EXAMIANS APP
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