Refrigeration and Air Conditioning The thermostatic expansion valve operates on the changes in the Pressure in the evaporator Degree of superheat at exit from the evaporator Temperature of the evaporator None of these Pressure in the evaporator Degree of superheat at exit from the evaporator Temperature of the evaporator None of these ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The human body feels comfortable when the heat stored in the body is None of these Zero Positive Negative None of these Zero Positive Negative ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by ( ( O.P.)R + 2 O.P)R O.P)P = ( O.P.)R + 1 O.P.)P = ( O.P)P = ( O.P)R - 1 ( O.P.)P = ( ( ( ( O.P.)R + 2 O.P)R O.P)P = ( O.P.)R + 1 O.P.)P = ( O.P)P = ( O.P)R - 1 ( O.P.)P = ( ( ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg) 50 kJ/kg 100 kJ/kg 25 kJ/kg 125 kJ/kg 50 kJ/kg 100 kJ/kg 25 kJ/kg 125 kJ/kg ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In larger industrial and commercial reciprocating compression systems, refrigerant widely used is Ammonia R-12 Sulphur dioxide Carbon dioxide Ammonia R-12 Sulphur dioxide Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The freezing point of sulphur dioxide is -56.6°C -135.8°C -75.2°C -77.7°C -56.6°C -135.8°C -75.2°C -77.7°C ANSWER DOWNLOAD EXAMIANS APP
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