Refrigeration and Air Conditioning The humidity ratio or specific humidity is the mass of water vapour present in 1 m3 of wet air 1 kg of dry air 1 m3 of dry air 1 kg of wet air 1 m3 of wet air 1 kg of dry air 1 m3 of dry air 1 kg of wet 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.)R + 1 ( O.P.)P = ( ( O.P)R - 1 ( O.P.)P = ( O.P)P = ( O.P)R O.P)P = ( O.P.)R + 2 ( O.P.)R + 1 ( O.P.)P = ( ( O.P)R - 1 ( O.P.)P = ( O.P)P = ( O.P)R O.P)P = ( O.P.)R + 2 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and Carbon dioxide Lithium bromide R-12 Sulphur dioxide Carbon dioxide Lithium bromide R-12 Sulphur dioxide ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called High side float valve Thermostatic expansion valve Low side float valve Automatic expansion valve High side float valve Thermostatic expansion valve Low side float valve Automatic expansion valve ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In a psychrometric process, the sensible heat added is 30 kJ/s and the latent heat added is 20 kJ/s. The sensible heat factor for the process will be 0.3 0.67 1.5 0.6 0.3 0.67 1.5 0.6 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Nusselt number (NN) is given by NN = hl/k NN = ρ V l /μ NN = μ cp/k NN = V²/t.cp NN = hl/k NN = ρ V l /μ NN = μ cp/k NN = V²/t.cp ANSWER DOWNLOAD EXAMIANS APP
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