Refrigeration and Air Conditioning For obtaining high COP, the pressure range of compressor should be High Any value Optimum Low High Any value Optimum Low ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Reducing suction pressure in refrigeration cycle All of these Increases power required per ton of refrigeration Lowers evaporation temperature Lowers compressor capacity because vapour is lighter All of these Increases power required per ton of refrigeration Lowers evaporation temperature Lowers compressor capacity because vapour is lighter ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Nusselt number (NN) is given by NN = hl/k NN = μ cp/k NN = ρ V l /μ NN = V²/t.cp NN = hl/k NN = μ cp/k NN = ρ V l /μ NN = V²/t.cp ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In larger industrial and commercial reciprocating compression systems, refrigerant widely used is Carbon dioxide Ammonia Sulphur dioxide R-12 Carbon dioxide Ammonia Sulphur dioxide R-12 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 1.86 kW 3.72 kW 7.44 kW 18.6 kW 1.86 kW 3.72 kW 7.44 kW ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The central air conditioning system has ___________ overall efficiency as compared to individual systems. Higher Same None of these Lower Higher Same None of these Lower ANSWER DOWNLOAD EXAMIANS APP