In S.J. unit, one ton of refrigeration is equal to

A. 210 kJ/ min

B. 21 kJ/ min

C. 420 kJ/ min

D. 840 kJ/ min

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  1. The difference between dry bulb temperature and wet bulb temperature, is called
  2. The horizontal and non-uniformly spaced lines on a psychrometric chart indicates
  3. The power per tonne of refrigeration is
  4. In case of sensible cooling of air, the coil efficiency is given by
  5. In a psychrometric process, the sensible heat added is 30 kJ/s and the latent heat added is 20 kJ/s.…
  6. The dehumidification process, on the psychrometric chart, is shown by
  7. Allowable pressure on high pressure side or ammonia absorption system is of the order of
  8. Air refrigeration cycle is used in
  9. The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.
  10. The pressure at the inlet of a refrigerant compressor is called
  11. A good refrigerant should have
  12. The refrigerant used in small tonnage commercial machines (hermetically sealed units) is
  13. The humidity ratio or specific humidity is the mass of water vapour present in
  14. A vapour absorption refrigerator uses __________ as a refrigerant.
  15. The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature…
  16. In mechanical refrigeration system, the refrigerant has the maximum temperature
  17. A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will…
  18. A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking…
  19. Cooling water is required for following equipment in ammonia absorption plant
  20. The wet bulb temperature during sensible heating of air
  21. Vertical lines on pressure-enthalpy chart show constant
  22. Which of the following statement is wrong?
  23. Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption…
  24. Which of the following refrigerant is highly toxic and flammable?
  25. In a refrigeration system, the expansion device is connected between the
  26. Wet bulb temperature is the temperature of air recorded by a thermometer, when
  27. The superheating in a refrigeration cycle
  28. The leakage in a refrigeration system using Freon is detected by
  29. The general rule for rating refrigeration systems (excepting for CO₂ system) is to approximate…
  30. Condensing temperature in a refrigerator is the temperature