Refrigeration and Air Conditioning A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be 3.33 4.33 1.33 2.33 3.33 4.33 1.33 2.33 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be 3 kW 1 kW 4 kW 2 kW 3 kW 1 kW 4 kW 2 kW ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The superheating in a refrigeration cycle Decreases C.O.P. Increases C.O.P. Does not alter C.O.P. None of these Decreases C.O.P. Increases C.O.P. Does not alter C.O.P. None of these ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Reducing suction pressure in refrigeration cycle Lowers compressor capacity because vapour is lighter Increases power required per ton of refrigeration Lowers evaporation temperature All of these Lowers compressor capacity because vapour is lighter Increases power required per ton of refrigeration Lowers evaporation temperature All of these ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The desirable property of a refrigerant is High critical temperature Low boiling point All of these High latent heat of vaporisation High critical temperature Low boiling point All of these High latent heat of vaporisation ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In Electrolux refrigerator Ammonia is absorbed in hydrogen Ammonia evaporates in hydrogen Hydrogen evaporates in ammonia Ammonia is absorbed in water Ammonia is absorbed in hydrogen Ammonia evaporates in hydrogen Hydrogen evaporates in ammonia Ammonia is absorbed in water ANSWER DOWNLOAD EXAMIANS APP
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