DBATU Model MCQ – Refrigeration and Air-Conditioning Views: 77 [adinserter block="1"] Welcome to your Refrigeration & Air conditioning, dated December 22, 2024 1. The higher temperature in vapour compression cycle occurs atDeselect Answer Expansion valve Evaporator Condenser discharge Compressor discharge None 2. Critical temperature is the temperature above whichDeselect Answer A gas will never liquefy A gas will immediately liquefy Water will evaporate None of the above None 3. Air refrigeration operates onDeselect Answer Carnot cycle Rankine cycle Erricson cycle Brayton cycle None 4. Ammonia absorption refrigeration cycle requiresDeselect Answer Very little work input Maximum work input Zero work input None of the above None 5. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of iceDeselect Answer in 1 hour in 1 min in 24 hrs in 10 hr None 6. In S.I unit ,one ton of refrigeration is equal toDeselect Answer 210 kJ/min 420kJ/min 21kJ/min 550kJ/min None 7. Condensing temperature in a refrigerator is the temperatureDeselect Answer of cooling medium of freezing zone at which refrigerant gas becomes liquid at evaporate None 8. Accumulators should have adequate volume to store refrigerant charge at leastDeselect Answer 10% 50% 25% 100% None 9. 9. Which of the following is not the desirable property of a refrigerantDeselect Answer A. Low boiling point B. Large latent heat C. non inflammable D. good electrical conductor None 10. 10. Efficiency of Carnot engine is given as 80%. If the cycle direction be reversed , what will be the value of COP of reverse Carnot cycleDeselect Answer A. 1.25 B. 0.8 C. 0.25 D. 0.5 None Please fill in the comment box below. [adinserter block="1"]
