Refrigeration and Air Conditioning On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process Takes place at constant entropy Involves no change in volume Takes place at constant temperature Takes place at constant pressure Takes place at constant entropy Involves no change in volume Takes place at constant temperature Takes place at constant pressure ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The lowest thermal diffusivity is of Lead Iron Rubber Aluminium Lead Iron Rubber Aluminium ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Formation of frost on evaporator in refrigerator Is immaterial Results in loss of heat due to poor heat transfer Can be avoided by proper design Increases heat transfer rate Is immaterial Results in loss of heat due to poor heat transfer Can be avoided by proper design Increases heat transfer rate ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In case of sensible cooling of air, the coil efficiency is given by 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. 1 - B.P.F. ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following refrigerant has the lowest freezing point? R-12 R-11 Ammonia R-22 R-12 R-11 Ammonia R-22 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following statement is wrong? In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour The value of C.O.P. is always greater than one The space between the saturated liquid line and saturated vapour line, in a pressure enthalpy chart, is wet vapour region None of the listed here In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour The value of C.O.P. is always greater than one The space between the saturated liquid line and saturated vapour line, in a pressure enthalpy chart, is wet vapour region None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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