Refrigeration and Air Conditioning Which of the following refrigerants has lowest freezing point? CO2 NH3 Freon-12 Freon-22 CO2 NH3 Freon-12 Freon-22 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity) 25°C DBT and 40% RH 25°C DBT and 100% RH 22°C DBT and 60% RH 20°C DBT and 80% RH 25°C DBT and 40% RH 25°C DBT and 100% RH 22°C DBT and 60% RH 20°C DBT and 80% RH ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The unit of thermal diffusivity is m/h m²/hK m²/h m/hK m/h m²/hK m²/h m/hK ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In a vapour compression refrigeration system, a throttle valve is used in place of an expander because It considerably reduces mass of the system The positive work in isentropic expansion of liquid is very small It improves the C.O.P., as the condenser is small It leads to significant cost reduction It considerably reduces mass of the system The positive work in isentropic expansion of liquid is very small It improves the C.O.P., as the condenser is small It leads to significant cost reduction ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The relative coefficient of performance is Actual COP/theoretical COP Theoretical COP/actual COP None of these Actual COP × theoretical COP Actual COP/theoretical COP Theoretical COP/actual COP None of these Actual COP × theoretical COP ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The bypass factor of a cooling coil decreases with Increase in fin spacing and increase in number of rows Decrease in fin spacing and decrease in number of rows Decrease in fin spacing and increase in number of rows Increase in fin spacing and decrease in number of rows Increase in fin spacing and increase in number of rows Decrease in fin spacing and decrease in number of rows Decrease in fin spacing and increase in number of rows Increase in fin spacing and decrease in number of rows ANSWER DOWNLOAD EXAMIANS APP
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