Refrigeration and Air Conditioning The C.O.P. of a heat pump working on a reversed Carnot cycle is T₂/(T₂ - T₁) (T₁ - T₂)/T₁ (T₂ - T₁)/T₁ T₁/(T₂ - T₁) T₂/(T₂ - T₁) (T₁ - T₂)/T₁ (T₂ - T₁)/T₁ T₁/(T₂ - T₁) ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Moisture should be removed from refrigerants to avoid Corrosion of steel plates Restriction to refrigerant flow All of these Freezing at the expansion valve Corrosion of steel plates Restriction to refrigerant flow All of these Freezing at the expansion valve ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is Reversed Brayton cycle Reversed Joule cycle Reversed Carnot cycle Reversed Otto cycle Reversed Brayton cycle Reversed Joule cycle Reversed Carnot cycle Reversed Otto cycle ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The condition of refrigerant after passing through the condenser in a vapour compression system is Dry saturated vapour Wet vapour Superheated vapour Saturated liquid Dry saturated vapour Wet vapour Superheated vapour Saturated liquid ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process Takes place at constant entropy Involves no change in volume Takes place at constant pressure Takes place at constant temperature Takes place at constant entropy Involves no change in volume Takes place at constant pressure Takes place at constant temperature ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be 1.33 2.33 3.33 4.33 1.33 2.33 3.33 4.33 ANSWER DOWNLOAD EXAMIANS APP
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