Refrigeration and Air Conditioning For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow. Less than Greater than Equal to None of these Less than Greater than Equal to None of these 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) (T₂ - T₁)/T₁ T₂/ (T₂ - T₁) T₁ / (T₂ - T₁) (T₁ - T₂)/T₁ (T₂ - T₁)/T₁ T₂/ (T₂ - T₁) T₁ / (T₂ - T₁) (T₁ - T₂)/T₁ ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Reducing suction pressure in refrigeration cycle Increases power required per ton of refrigeration Lowers compressor capacity because vapour is lighter Lowers evaporation temperature All of these Increases power required per ton of refrigeration Lowers compressor capacity because vapour is lighter Lowers evaporation temperature All of these ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A standard ice point temperature corresponds to the temperature of Mixture of ice and water under equilibrium conditions Solid and dry ice Ice at 4°C Water at 0°C Mixture of ice and water under equilibrium conditions Solid and dry ice Ice at 4°C Water at 0°C ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Nusselt number (NN) is given by NN = V²/t.cp 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 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning One of the purposes of sub cooling the liquid refrigerant is to Increase cooling effect Ensure that only liquid and not the vapour enters the expansion (throttling) valve Reduce compressor overheating Reduce compressor discharge temperature Increase cooling effect Ensure that only liquid and not the vapour enters the expansion (throttling) valve Reduce compressor overheating Reduce compressor discharge temperature ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS