Formation of frost on evaporator in refrigerator

A. Results in loss of heat due to poor heat transfer

B. Increases heat transfer rate

C. Is immaterial

D. Can be avoided by proper design

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  1. In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is
  2. An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation…
  3. In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at
  4. A standard ice point temperature corresponds to the temperature of
  5. Critical temperature is the temperature above which
  6. The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which…
  7. Formation of frost on evaporator in refrigerator
  8. One ton refrigeration corresponds to
  9. The COP of a vapour compression plant in comparison to vapour absorption plant is
  10. If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the…
  11. The boiling point of ________ is 10.5°C.
  12. The refrigerant for a refrigerator should have
  13. A refrigeration system
  14. It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature…
  15. A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing…
  16. The superheating in a refrigeration cycle
  17. During adiabatic saturation process on unsaturated air __________ remains constant.
  18. A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called
  19. During sensible cooling of air, specific humidity
  20. Choose the correct statement
  21. The condition of refrigerant after passing through the condenser in a vapour compression system is
  22. The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour…
  23. The sensible heat factor during cooling and dehumidification process is given by (where h₁ =…
  24. The coefficient of performance of Heat Pump is always __________ one.
  25. In a psychrometric chart, specific humidity (moisture content) lines are
  26. In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature
  27. The evaporator used in household refrigerators is
  28. Highest temperature encountered in refrigeration cycle should be
  29. During sensible cooling of air ________ decreases.
  30. The Freon group of refrigerants are