Refrigeration and Air Conditioning In case of sensible cooling of air, the coil efficiency is given by 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. 1 - B.P.F. ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature) T₁ / (T₂ - T₁) T₂/ (T₂ - T₁) (T₁ - T₂)/T₁ (T₂ - T₁)/T₁ T₁ / (T₂ - T₁) T₂/ (T₂ - T₁) (T₁ - T₂)/T₁ (T₂ - T₁)/T₁ ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is 18.6 kW 3.72 kW 1.86 kW 7.44 kW 18.6 kW 3.72 kW 1.86 kW 7.44 kW ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following refrigerants has lowest freezing point? Freon-12 CO2 Freon-22 NH3 Freon-12 CO2 Freon-22 NH3 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 0.6 0.67 0.376 0.4 0.6 0.67 0.376 0.4 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The cooling system used for supersonic aircrafts and rockets is Regenerative air cooling system Bootstrap air cooling system Reduced ambient air cooling system Simple air cooling system Regenerative air cooling system Bootstrap air cooling system Reduced ambient air cooling system Simple air cooling system ANSWER DOWNLOAD EXAMIANS APP
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