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The emissivity of a polished silver body is __________ as compared to black body.

A. Same

B. Low

C. Very low

D. High

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. The vapour pressure of refrigerant should be
  2. The superheated vapour region, in a pressure enthalpy chart, is represented by the space
  3. A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine…
  4. In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)
  5. The vertical and uniformly spaced lines on a psychrometric chart indicates
  6. A thermostatic expansion valve in a refrigeration system
  7. Which of the following statement is correct?
  8. In S.J. unit, one ton of refrigeration is equal to
  9. In chemical dehumidification process,
  10. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of…
  11. Critical temperature is the temperature above which
  12. The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature…
  13. A bootstrap air cooling system has
  14. In a vapour compression system, the condition of refrigerant is dry saturated vapour
  15. The thermostatic expansion valve operates on the changes in the
  16. One ton refrigeration corresponds to
  17. The index which correlates the combined effects of air temperature, relative humidity and air velocity…
  18. The refrigerant for a refrigerator should have
  19. The undesirable property of a refrigerant is
  20. In Electrolux refrigerator
  21. The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by
  22. The material of pipe lines for a system using Freon as a refrigerant should be
  23. In a reversed Brayton cycle, the heat is absorbed by the air during
  24. The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called
  25. Critical pressure of a liquid is the pressure
  26. Which of the following statement is wrong?
  27. The coefficient of performance of Heat Pump is always __________ one.
  28. When the air is passed through an insulated chamber having sprays of water maintained at a temperature…
  29. In vapour compression cycle, the condition of refrigerant is very wet vapour
  30. In a refrigeration system, heat absorbed in comparison to heat rejected is