Refrigeration and Air Conditioning Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since These react with ozone layer These react with water vapour and cause acid rain These react with oxygen and cause its depletion These react with plants and cause greenhouse effect These react with ozone layer These react with water vapour and cause acid rain These react with oxygen and cause its depletion These react with plants and cause greenhouse effect ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called Relative humidity Absolute humidity Humidity ratio Degree of saturation Relative humidity Absolute humidity Humidity ratio Degree of saturation ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In a pressure enthalpy chart, the space to the left of the saturated liquid line represents Sub-cooled liquid region None of the listed here Wet vapour region Superheated vapour region Sub-cooled liquid region None of the listed here Wet vapour region Superheated vapour region 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 - 1 ( O.P)P = ( O.P.)R + 2 O.P)P = ( O.P.)R + 1 ( O.P.)P = ( O.P)R ( ( O.P.)P = ( O.P)R - 1 ( O.P)P = ( O.P.)R + 2 O.P)P = ( O.P.)R + 1 ( O.P.)P = ( O.P)R ( ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning One tonne of refrigeration (1TR) means that the heat removing capacity is 21 kJ/min 420 kJ/min 210 kJ/min 620 kJ/min 21 kJ/min 420 kJ/min 210 kJ/min 620 kJ/min ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The coefficient of performance of Electrolux refrigerator is the ratio of Heat absorbed by the evaporator minus the heat supplied by the gas burner to the heat absorbed by the evaporator Heat supplied by the gas burner to the heat absorbed by the evaporator Heat absorbed by the evaporator to the heat supplied by the gas burner Heat supplied by the gas burner minus the heat absorbed by the evaporator to the heat supplied by the gas burner Heat absorbed by the evaporator minus the heat supplied by the gas burner to the heat absorbed by the evaporator Heat supplied by the gas burner to the heat absorbed by the evaporator Heat absorbed by the evaporator to the heat supplied by the gas burner Heat supplied by the gas burner minus the heat absorbed by the evaporator to the heat supplied by the gas burner ANSWER DOWNLOAD EXAMIANS APP
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