Refrigeration and Air Conditioning Which of the following refrigerant has the lowest freezing point? Ammonia R-22 R-12 R-11 Ammonia R-22 R-12 R-11 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Dry bulb temperature is the temperature of air recorded by a thermometer, when None of the listed here Its bulb is surrounded by a wet cloth exposed to the air The moisture present in it begins to condense It is not affected by the moisture present in the air None of the listed here Its bulb is surrounded by a wet cloth exposed to the air The moisture present in it begins to condense It is not affected by the moisture present in the air 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 + 2 ( O.P.)R + 1 ( ( O.P)R O.P)R - 1 ( O.P)P = ( O.P.)P = ( O.P.)P = ( O.P)P = ( O.P.)R + 2 ( O.P.)R + 1 ( ( O.P)R O.P)R - 1 ( O.P)P = ( O.P.)P = ( O.P.)P = ( ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Formation of frost on evaporator in refrigerator Can be avoided by proper design Results in loss of heat due to poor heat transfer Is immaterial Increases heat transfer rate Can be avoided by proper design Results in loss of heat due to poor heat transfer Is immaterial Increases heat transfer rate ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In a vapour compression system, the condition of refrigerant is dry saturated vapour Before entering the compressor After leaving the condenser After leaving the compressor Before entering the condenser Before entering the compressor After leaving the condenser After leaving the compressor Before entering the condenser ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Allowable pressure on high pressure side or ammonia absorption system is of the order of Slightly above atmospheric pressure Atmospheric pressure 24 bars 56 bars Slightly above atmospheric pressure Atmospheric pressure 24 bars 56 bars ANSWER DOWNLOAD EXAMIANS APP
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