Refrigeration and Air Conditioning In aircraft, air refrigeration Cycle is used because of Higher coefficient of performance Low temperature at high altitudes High heat transfer rate Low weight per tonne of refrigeration Higher coefficient of performance Low temperature at high altitudes High heat transfer rate Low weight per tonne of refrigeration ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The operating pressure for refrigerating units using R-12 as a refrigerant is 30 bar 2 bar 8 bar 15 bar 30 bar 2 bar 8 bar 15 bar ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The formation of frost on cooling coils in a refrigerator Increases heat transfer Reduces power consumption Increases power consumption Improves C.O.P. of the system Increases heat transfer Reduces power consumption Increases power consumption Improves C.O.P. of the system ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The pressure at the outlet of a refrigerant compressor is called Suction pressure Discharge pressure Critical pressure Back pressure Suction pressure Discharge pressure Critical pressure Back pressure 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 Perfectly tight vapour seal should be used Bigger cabinet should be used Smaller cabinet should be used Refrigerant with lower evaporation temperature should be used Perfectly tight vapour seal should be used Bigger cabinet should be used Smaller cabinet should be used Refrigerant with lower evaporation temperature should be used ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The value of C.O.P in vapour compression cycle is usually Equal to unity Always less than unity Always more than unity Any one of the above Equal to unity Always less than unity Always more than unity Any one of the above ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS