Most air cooled condensers are designed to operate with a temperature difference of

A. 5°C

B. 8°C

C. 14°C

D. 22°C

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  1. The emissivity of a polished silver body is __________ as compared to black body.
  2. Carbon dioxide is
  3. In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively
  4. The process, generally used in summer air conditioning to cool and dehumidify the air, is called
  5. In a psychrometric chart, specific humidity (moisture content) lines are
  6. The superheated vapour region, in a pressure enthalpy chart, is represented by the space
  7. The air cooling system mostly used in transport type aircrafts is
  8. The pressure at the inlet of a refrigerant compressor is called
  9. An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation…
  10. Condensing temperature in a refrigerator is the temperature
  11. The boiling point of carbon dioxide is
  12. The relative humidity is defined as
  13. The condition of refrigerant after passing through the expansion or throttle valve, in a vapour compression…
  14. Which of the following statement is correct?
  15. The operating pressure for refrigerating units using R-12 as a refrigerant is
  16. Pressure of water vapour is given by
  17. Which of the following statement is correct for ammonia as a refrigerant?
  18. Critical pressure of a liquid is the pressure
  19. The leakage in a refrigeration system using Freon is detected by
  20. The relative coefficient of performance is equal to
  21. The COP of a vapour compression plant in comparison to vapour absorption plant is
  22. In a vapour compression system, the condition of refrigerant is dry saturated vapour
  23. When the air is passed through an insulated chamber having sprays of water maintained at a temperature…
  24. The alignment circle is marked on the psychrometric chart at
  25. During dehumidification process, __________ remains constant.
  26. In a refrigeration system, the expansion device is connected between the
  27. Degree of saturation or percentage humidity is
  28. Which of the following refrigerant has the lowest freezing point?
  29. The relative coefficient of performance is
  30. Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?