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 4.33 1.33 2.33 3.33 4.33 1.33 2.33 3.33 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Most thermostatic expansion valves are set for a superheat of 15°C 5°C 10°C 20°C 15°C 5°C 10°C 20°C ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The leakage in a refrigeration system using ammonia is detected by Halide torch All of these Sulphur sticks Soap and water Halide torch All of these Sulphur sticks Soap and water ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Critical pressure of a liquid is the pressure Above which liquid becomes vapour Above which liquid becomes gas Above which liquid becomes solid Above which liquid will remain liquid Above which liquid becomes vapour Above which liquid becomes gas Above which liquid becomes solid Above which liquid will remain liquid ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Allowable pressure on high pressure side or ammonia absorption system is of the order of 56 bars Slightly above atmospheric pressure 24 bars Atmospheric pressure 56 bars Slightly above atmospheric pressure 24 bars Atmospheric pressure ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Reducing suction pressure in refrigeration cycle All of these 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 ANSWER DOWNLOAD EXAMIANS APP
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