Refrigeration and Air Conditioning At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant decreases depends on other factors remains same increases decreases depends on other factors remains same increases ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice In 1 minute In 24 hours In 1 hour In 12 hours In 1 minute In 24 hours In 1 hour In 12 hours ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system Weak solution to strong solution Strong solution to ammonia vapour Ammonia vapours to weak solution Strong solution to weak solution Weak solution to strong solution Strong solution to ammonia vapour Ammonia vapours to weak solution Strong solution to weak solution 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) 125 kJ/kg 25 kJ/kg 100 kJ/kg 50 kJ/kg 125 kJ/kg 25 kJ/kg 100 kJ/kg 50 kJ/kg ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of Aluminium Copper Steel Brass Aluminium Copper Steel Brass ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning One of the purposes of sub cooling the liquid refrigerant is to 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 Increase cooling effect ANSWER DOWNLOAD EXAMIANS APP
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