Refrigeration and Air Conditioning Dry bulb temperature is the temperature of air recorded by a thermometer, when Its bulb is surrounded by a wet cloth exposed to the air The moisture present in it begins to condense It is not affected by the moisture present in the air None of the listed here Its bulb is surrounded by a wet cloth exposed to the air The moisture present in it begins to condense It is not affected by the moisture present in the air None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is 0.376 0.6 0.4 0.67 0.376 0.6 0.4 0.67 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The relative coefficient of performance is 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 Theoretical COP/actual COP ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The formation of frost on cooling coils in a refrigerator Improves C.O.P. of the system Reduces power consumption Increases heat transfer Increases power consumption Improves C.O.P. of the system Reduces power consumption Increases heat transfer Increases power consumption ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following refrigerants has lowest freezing point? NH3 CO2 Freon-12 Freon-22 NH3 CO2 Freon-12 Freon-22 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Nusselt number (NN) is given by NN = ρ V l /μ NN = hl/k NN = μ cp/k NN = V²/t.cp NN = ρ V l /μ NN = hl/k NN = μ cp/k NN = V²/t.cp ANSWER DOWNLOAD EXAMIANS APP
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