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A human body feels comfortable when the heat produced by the metabolism of human body is equal to the

A. Heat dissipated to the surroundings

B. Heat stored in the human body

C. Sum of (A) and (B)

D. Difference of (A) and (B)

Correct Answer : C.


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  1. The superheated vapour region, in a pressure enthalpy chart, is represented by the space
  2. The leaks in a refrigeration system using Freon are detected by
  3. In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity…
  4. While designing the refrigeration system of an aircraft, the prime consideration is that the
  5. During sensible cooling of air, specific humidity
  6. The material of pipe lines for a system using Freon as a refrigerant should be
  7. The thermostatic expansion valve is used in __________ type of evaporators.
  8. The wet bulb temperature at 100% relative humidity is ________ dry bulb temperature.
  9. Chaperon equation is a relation between
  10. The refrigerant widely used in domestic refrigerators is
  11. The value of C.O.P in vapour compression cycle is usually
  12. In a refrigerating machine, heat rejected is _________ heat absorbed.
  13. Dry bulb temperature is the temperature of air recorded by a thermometer, when
  14. The power per tonne of refrigeration is
  15. In a vapour compression system, the condition of refrigerant is dry saturated vapour
  16. For unsaturated air, the dew point temperature is __________ wet bulb temperature.
  17. Moisture in Freon refrigeration system causes
  18. The freezing point of R-12 is
  19. In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
  20. Most thermostatic expansion valves are set for a superheat of
  21. A refrigerant compressor is used to
  22. The evaporator used in household refrigerators is
  23. Nusselt number (NN) is given by
  24. For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied…
  25. Pressure of water vapour is given by
  26. For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and…
  27. Which of the following cycles uses air as the refrigerant?
  28. The refrigerant after condensation process is cooled below the saturation temperature before throttling.…
  29. The process, generally used in summer air conditioning to cool and dehumidify the air, is called
  30. Air refrigeration operates on