Refrigeration and Air Conditioning The wet bulb temperature during sensible heating of air None of these Decreases Increases Remains constant None of these Decreases Increases Remains constant ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The refrigerant used in small tonnage commercial machines (hermetically sealed units) is Sulphur dioxide R-12 Ammonia Carbon dioxide Sulphur dioxide R-12 Ammonia Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor) 1 - B. P.F. 1 + B.P.F. P.F. - 1 1/ B.P.F. 1 - B. P.F. 1 + B.P.F. P.F. - 1 1/ B.P.F. ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then Bigger cabinet should be used Refrigerant with lower evaporation temperature should be used Perfectly tight vapour seal should be used Smaller cabinet should be used Bigger cabinet should be used Refrigerant with lower evaporation temperature should be used Perfectly tight vapour seal should be used Smaller cabinet should be used ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The condition of refrigerant after passing through the condenser in a vapour compression system is Saturated liquid Superheated vapour Wet vapour Dry saturated vapour Saturated liquid Superheated vapour Wet vapour Dry saturated vapour ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following statement is wrong? None of the listed here In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour The space between the saturated liquid line and saturated vapour line, in a pressure enthalpy chart, is wet vapour region The value of C.O.P. is always greater than one None of the listed here In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour The space between the saturated liquid line and saturated vapour line, in a pressure enthalpy chart, is wet vapour region The value of C.O.P. is always greater than one ANSWER DOWNLOAD EXAMIANS APP
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