Refrigeration and Air Conditioning In a vapour compression cycle, the refrigerant immediately after expansion valve is Saturated liquid Wet vapour Liquid Sub-cooled liquid Saturated liquid Wet vapour Liquid Sub-cooled liquid ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning One of the purposes of sub cooling the liquid refrigerant is to Reduce compressor overheating Increase cooling effect Ensure that only liquid and not the vapour enters the expansion (throttling) valve Reduce compressor discharge temperature Reduce compressor overheating Increase cooling effect Ensure that only liquid and not the vapour enters the expansion (throttling) valve Reduce compressor discharge temperature ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Relative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure, ps = Pressure of saturated air, pd = Pressure at dry bulb temperature, pw = Saturation pressure corresponding to wet bulb temperature, and μ = Degree of saturation) 0.622 Pv / (Pb - Pv) [Pv (Pb - Pd)]/ [Pd (Pb - Pv)] None of these μ/[1 - (1 - μ) (Ps/Pb)] 0.622 Pv / (Pb - Pv) [Pv (Pb - Pd)]/ [Pd (Pb - Pv)] None of these μ/[1 - (1 - μ) (Ps/Pb)] ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning During heating and humidification, the final relative humidity of air Is lower than that of the entering air Is higher than that of the entering air Can be lower or higher than that of the entering air None of the listed here Is lower than that of the entering air Is higher than that of the entering air Can be lower or higher than that of the entering air None of the listed here 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 Superheated vapour region Wet vapour region None of the listed here Sub-cooled liquid region Superheated vapour region Wet vapour region None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be 1 kW 4 kW 3 kW 2 kW 1 kW 4 kW 3 kW 2 kW ANSWER DOWNLOAD EXAMIANS APP
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