Refrigeration and Air Conditioning The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called Humidity ratio Degree of saturation Relative humidity Absolute humidity Humidity ratio Degree of saturation Relative humidity Absolute humidity ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Moisture should be removed from refrigerants to avoid Corrosion of steel plates Freezing at the expansion valve Restriction to refrigerant flow All of these Corrosion of steel plates Freezing at the expansion valve Restriction to refrigerant flow All of these ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of 1: 3 1: 9 1: 1 9: 1 1: 3 1: 9 1: 1 9: 1 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The reciprocating refrigerant compressors are very suitable for Large displacements and low condensing pressures Small displacements and low condensing pressures Large displacements and high condensing pressures Small displacements and high condensing pressures Large displacements and low condensing pressures Small displacements and low condensing pressures Large displacements and high condensing pressures Small displacements and high condensing pressures ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at Delivery of compressor Low pressure side near receiver High pressure side close to receiver Suction of compressor Delivery of compressor Low pressure side near receiver High pressure side close to receiver Suction of compressor 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.)P = ( ( ( O.P)R O.P)P = ( O.P.)R + 1 O.P.)R + 2 O.P)R - 1 O.P.)P = ( O.P)P = ( ( ( O.P.)P = ( ( ( O.P)R O.P)P = ( O.P.)R + 1 O.P.)R + 2 O.P)R - 1 O.P.)P = ( O.P)P = ( ( ANSWER DOWNLOAD EXAMIANS APP
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