The thermal diffusivity for gases is generally __________ those for liquids.

A. Equal to

B. Less than

C. Greater than

D. None of these

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  1. Air refrigeration cycle is used in
  2. The leakage in a refrigeration system using Freon is detected by
  3. The emissivity of a polished silver body is __________ as compared to black body.
  4. Absorption system normally uses the following refrigerant
  5. Bell Coleman cycle is a
  6. The difference between dry bulb temperature and dew point temperature, is called
  7. The alignment circle is marked on the psychrometric chart at
  8. The minimum temperature to which water can be cooled in a cooling tower is
  9. In which of the following refrigeration system, waste heat can be effectively used?
  10. During dehumidification process, __________ remains constant.
  11. For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and…
  12. The difference between dry bulb temperature and wet bulb temperature, is called
  13. Rating of a domestic refrigerator is of the order of
  14. For obtaining high COP, the pressure range of compressor should be
  15. In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water…
  16. Oil separator in a refrigeration cycle is installed
  17. The bypass factor for a cooling coil
  18. Under cooling in a refrigeration cycle
  19. The relative humidity is defined as
  20. In a pressure enthalpy chart, the space to the left of the saturated liquid line represents
  21. In larger industrial and commercial reciprocating compression systems, refrigerant widely used is
  22. The boiling point of ________ is 10.5°C.
  23. A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same…
  24. Air refrigeration cycle is used in
  25. The evaporator changes the low pressure liquid refrigerant from the expansion valve into
  26. Which of the following refrigerant has the highest freezing point.
  27. For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference…
  28. The bank of tubes at the back of domestic refrigerator is
  29. In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature
  30. When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance…