Refrigeration and Air Conditioning A good refrigerant should have High specific volume and high latent heat of vaporisation High latent heat of vaporisation and low freezing point High operating pressures and low freezing point Low C.O.P. and low freezing point High specific volume and high latent heat of vaporisation High latent heat of vaporisation and low freezing point High operating pressures and low freezing point Low C.O.P. and low freezing point ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The leakage in a refrigeration system using ammonia is detected by All of these Sulphur sticks Halide torch Soap and water All of these Sulphur sticks Halide torch Soap and water ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to Orange Bright green Red Yellow Orange Bright green Red Yellow ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by Operating the machine at lower speeds Lowering the higher temperature Raising the higher temperature Operating the machine at higher speeds Operating the machine at lower speeds Lowering the higher temperature Raising the higher temperature Operating the machine at higher speeds ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Moisture should be removed from refrigerants to avoid Corrosion of steel plates All of these Restriction to refrigerant flow Freezing at the expansion valve Corrosion of steel plates All of these Restriction to refrigerant flow Freezing at the expansion valve ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In aircraft, air refrigeration Cycle is used because of Higher coefficient of performance Low weight per tonne of refrigeration Low temperature at high altitudes High heat transfer rate Higher coefficient of performance Low weight per tonne of refrigeration Low temperature at high altitudes High heat transfer rate ANSWER DOWNLOAD EXAMIANS APP