Refrigeration and Air Conditioning The relative coefficient of performance is Theoretical COP/actual COP Actual COP/theoretical COP Actual COP × theoretical COP None of these Theoretical COP/actual COP Actual COP/theoretical COP Actual COP × theoretical COP None of these ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning During heating and humidification, the final relative humidity of air Is higher than that of the entering air Can be lower or higher than that of the entering air Is lower than that of the entering air None of the listed here Is higher than that of the entering air Can be lower or higher than that of the entering air Is lower than that of the entering air None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The sub-cooling in a refrigeration cycle None of these Does not alter C.O.P. Decreases C.O.P. Increases C.O.P. None of these Does not alter C.O.P. Decreases C.O.P. Increases C.O.P. ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is Dry vapour Wet vapour High pressure saturated liquid Very wet vapour Dry vapour Wet vapour High pressure saturated liquid Very wet vapour ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The operating pressure for refrigerating units using R-12 as a refrigerant is 2 bar 8 bar 15 bar 30 bar 2 bar 8 bar 15 bar 30 bar ANSWER DOWNLOAD EXAMIANS APP
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
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