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The optimum effective temperature for human comfort is

A. Higher in winter than in summer

B. Lower in winter than in summer

C. Same in winter and summer

D. Not dependent on season

Correct Answer : B.


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  1. The COP of a domestic refrigerator
  2. A bootstrap air cooling system has
  3. The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by
  4. The index which correlates the combined effects of air temperature, relative humidity and air velocity…
  5. An Electrolux refrigerator is called a __________ absorption system.
  6. Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption…
  7. The dry bulb temperature during sensible heating of air
  8. The specific humidity during cooling and dehumidification
  9. In a refrigeration cycle, the flow of refrigerant is controlled by
  10. In vapour compression cycle, the condition of refrigerant is saturated liquid
  11. The leakage in a refrigeration system using Freon is detected by
  12. Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?
  13. In a bootstrap air evaporative cooling system, the evaporator is provided
  14. In aircraft, air refrigeration Cycle is used because of
  15. Most of the domestic refrigerators work on the following refrigeration system
  16. Vapour compression refrigeration is somewhat like
  17. The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour…
  18. The bypass factor for a cooling coil
  19. A standard ice point temperature corresponds to the temperature of
  20. A vapour absorption refrigerator uses __________ as a refrigerant.
  21. Highest pressure encountered in a refrigeration system should be
  22. Most air cooled condensers are designed to operate with a temperature difference of
  23. Pick up the wrong statement. A refrigerant should have
  24. Moisture should be removed from refrigerants to avoid
  25. The thermal diffusivity for gases is generally __________ those for liquids.
  26. The material of pipe lines for a system using Freon as a refrigerant should be
  27. The operating temperature of a cold storage is 2°C. The heat leakage from the surrounding is 30…
  28. Which of the following statement is correct?
  29. In a saturated air-water vapour mixture, the
  30. The dry bulb temperature lines, on the psychrometric chart are