The COP of a domestic refrigerator

A. Is less than 1

B. Is more than 1

C. Is equal to 1

D. Depends upon the make

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  1. In a refrigeration cycle, the flow of refrigerant is controlled by
  2. The reciprocating refrigerant compressors are very suitable for
  3. In a pressure enthalpy chart, the space to the left of the saturated liquid line represents
  4. The COP of a vapour compression plant in comparison to vapour absorption plant is
  5. The general rule for rating refrigeration systems (excepting for CO₂ system) is to approximate…
  6. The fluids used in Electrolux refrigerator are
  7. The freezing point of sulphur dioxide is
  8. If a gas is to be liquefied, its temperature must be
  9. In a lithium bromide absorption refrigeration system
  10. Relative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure,…
  11. The specific humidity during humidification process
  12. The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called
  13. The material of pipe lines for a system using Freon as a refrigerant should be
  14. Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the…
  15. On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line…
  16. The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour…
  17. Choose the wrong statement
  18. The optimum effective temperature for human comfort is
  19. The mass of water vapour present in __________ is called absolute humidity.
  20. The freezing point of R-12 is
  21. Which of the following statement is wrong?
  22. Most air cooled condensers are designed to operate with a temperature difference of
  23. A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called
  24. A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing…
  25. Critical pressure of a liquid is the pressure
  26. The bypass factor, in case of sensible cooling of air, is given by (where td₁ = Dry bulb temperature…
  27. The evolution of heat of solution takes place in ammonia absorption plant when
  28. In a refrigerating machine, heat rejected is _________ heat absorbed.
  29. A standard ice point temperature corresponds to the temperature of
  30. Air refrigeration operates on