Refrigeration and Air Conditioning The leaks in a refrigeration system using Freon are detected by Using reagents Halide torch which on detection produces greenish flame lighting Sulphur sticks which on detection gives white smoke Smelling Using reagents Halide torch which on detection produces greenish flame lighting Sulphur sticks which on detection gives white smoke Smelling ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg) 25 kJ/kg 125 kJ/kg 50 kJ/kg 100 kJ/kg 25 kJ/kg 125 kJ/kg 50 kJ/kg 100 kJ/kg ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Pick up the wrong statement. A refrigerant should have High latent heat of vaporisation High boiling point Tow specific heat of liquid Higher critical temperature High latent heat of vaporisation High boiling point Tow specific heat of liquid Higher critical temperature ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The refrigerant supplied to a compressor must be Dry saturated liquid refrigerant A mixture of liquid and vapour refrigerant None of these Superheated vapour refrigerant Dry saturated liquid refrigerant A mixture of liquid and vapour refrigerant None of these Superheated vapour refrigerant ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Formation of frost on evaporator in refrigerator Results in loss of heat due to poor heat transfer Increases heat transfer rate Can be avoided by proper design Is immaterial Results in loss of heat due to poor heat transfer Increases heat transfer rate Can be avoided by proper design Is immaterial ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The undesirable property of a refrigerant is Non-flammable Non-explosive Non-toxic High boiling point Non-flammable Non-explosive Non-toxic High boiling point ANSWER DOWNLOAD EXAMIANS APP
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