Refrigeration and Air Conditioning The relative coefficient of performance is Actual COP/theoretical COP Theoretical COP/actual COP None of these Actual COP × theoretical COP Actual COP/theoretical COP Theoretical COP/actual COP None of these Actual COP × theoretical COP ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then Bigger cabinet should be used Smaller cabinet should be used Perfectly tight vapour seal should be used Refrigerant with lower evaporation temperature should be used Bigger cabinet should be used Smaller cabinet should be used Perfectly tight vapour seal should be used Refrigerant with lower evaporation temperature should be used ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The leaks in a refrigeration system using Freon are detected by Smelling Using reagents Halide torch which on detection produces greenish flame lighting Sulphur sticks which on detection gives white smoke Smelling Using reagents Halide torch which on detection produces greenish flame lighting Sulphur sticks which on detection gives white smoke ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following refrigerant is highly toxic and flammable? Carbon dioxide Ammonia R-12 Sulphur dioxide Carbon dioxide Ammonia R-12 Sulphur dioxide ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A vapour absorption refrigeration system Requires little power consumption Gives quiet operation Cools below 0°C Gives noisy operation Requires little power consumption Gives quiet operation Cools below 0°C Gives noisy operation ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The cooling system used for supersonic aircrafts and rockets is Regenerative air cooling system Simple air cooling system Bootstrap air cooling system Reduced ambient air cooling system Regenerative air cooling system Simple air cooling system Bootstrap air cooling system Reduced ambient air cooling system ANSWER DOWNLOAD EXAMIANS APP
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