Refrigeration and Air Conditioning A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be 1.2 5 0.2 6 1.2 5 0.2 6 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) 125 kJ/kg 50 kJ/kg 100 kJ/kg 25 kJ/kg 125 kJ/kg 50 kJ/kg 100 kJ/kg 25 kJ/kg ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The minimum temperature to which water can be cooled in a cooling tower is Ambient air temperature Wet bulb temperature of air Dry bulb temperature of air Dew point temperature of air Ambient air temperature Wet bulb temperature of air Dry bulb temperature of air Dew point temperature of air ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process Takes place at constant pressure Takes place at constant entropy Takes place at constant temperature Involves no change in volume Takes place at constant pressure Takes place at constant entropy Takes place at constant temperature Involves no change in volume ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The process, generally used in summer air conditioning to cool and dehumidify the air, is called Dehumidification Humidification Heating and humidification Cooling and dehumidification Dehumidification Humidification Heating and humidification Cooling and dehumidification ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor) 1 - B. P.F. 1/ B.P.F. 1 + B.P.F. P.F. - 1 1 - B. P.F. 1/ B.P.F. 1 + B.P.F. P.F. - 1 ANSWER DOWNLOAD EXAMIANS APP
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