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The wet bulb depression indicates _________ humidity of the air.

A. Absolute

B. Relative

C. Specific

D. None of these

Correct Answer : B.


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  2. The relative coefficient of performance is equal to
  3. The boiling point of ________ is 10.5°C.
  4. An Electrolux refrigerator is called a __________ absorption system.
  5. Refrigeration in aeroplanes usually employs the following refrigerant
  6. The sensible heat factor during cooling and dehumidification process is given by (where h₁ =…
  7. The conditioned air supplied to the room must have the capacity to take up
  8. The coefficient of performance of Heat Pump is always __________ one.
  9. The higher temperature in vapour compression cycle occurs at
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  11. Which of the following statement is correct?
  12. Ammonia absorption refrigeration cycle requires
  13. While designing the refrigeration system of an aircraft, the prime consideration is that the
  14. The vapour compression refrigerator employs the following cycle
  15. During adiabatic saturation process on unsaturated air __________ remains constant.
  16. Chaperon equation is a relation between
  17. The thermal diffusivity for gases is generally __________ those for liquids.
  18. The dry bulb temperature during sensible heating of air
  19. It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature…
  20. One tonne of refrigeration (1TR) means that the heat removing capacity is
  21. Which of the following statement is correct?
  22. The evaporator used in household refrigerators is
  23. The difference between dry bulb temperature and dew point temperature, is called
  24. The undesirable property of a refrigerant is
  25. In S.J. unit, one ton of refrigeration is equal to
  26. The unit of thermal diffusivity is
  27. The C.O.P. of a heat pump working on a reversed Carnot cycle is
  28. In a lithium bromide absorption refrigeration system
  29. A good refrigerant should have
  30. Wet bulb temperature is the temperature of air recorded by a thermometer, when