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 In refrigeration, fill in blanks is possible only if one has deep understanding and clarity about the topic. This process of filling blanks will further increase knowledge which will help fundamentals to apply in real life applications.

Fill in the blanks in refrigeration is from university question papers

  1. The high pressure is from —————— to ———————–in a refrigeration system.

  2. The condition of refrigerant at the inlet of evaporator is ————–liquid and vapor.

  3. At the outlet of evaporator, the condition of refrigerant  is ——— and —— vapor.

  4. Inlet of the compressor, the condition of refrigerant is ———-pressure and —–temperature vapor.

  5. Refrigerant condition at the outlet of compressor is high————- and high———vapor.

  6. The refrigerant at the inlet of condenser is ————– pressure and ———temperature vapor.

  7. The state of refrigerant at the outlet of condenser is high ———— and high———– liquid.

  8.  Refrigerant at the inlet of expansion valve is ——-pressure and ——temperature liquid.

  9. At the inlet of the evaporator, the condition of refrigerant is ————–liquid and vapor.

  10. The condition of refrigerant at the outlet of evaporator is  ———and —– vapor.

  11.  Most commonly used Freon R—and R—are banned,

  12.  Refrigerant used in industry is ———————.

  13.  Window air conditioner  ————-as a refrigerant.

  14. The condenser is the ——–pressure side of a refrigeration system.

  15. The low pressure side starts from ————–expansion valve and ends at ———–of compressor.

  16. The high pressure starts —————- of compressor and ends at the ——————–expansion valve.

  17. The function of the compressor is to increase ————— and —————.

  18. Refrigeration is a process of ——————–.

  19.  Refrigeration protects —————–against spoilage.

  20.  Growth of bacteria is greater in a ————————-atmosphere.

  21.  Bacteria growth is stopped with ———————.

  22. Principle of refrigeration is that ————causes cooling.

  23. Refrigeration capacity is in —————–.

  24. One ton of refrigeration is equal to ——————kJ/day.

  25. Cooling capacity of one ton of refrigeration is equal to ——————kJ/hour.

  26. Machine producing refrigeration is a ————————system.

  27. Most popular system which produces refrigeration is ———————-.

  28.  Refrigeration system using a ——————is a vapor compression refrigeration system.

  29.  System producing cooling with water is  ————————-.

  30.  Temperature decrease in the room due to a desert cooler will be ——————–0

  31. ————-energy runs the vapor absorption refrigeration system.

  32. In an absorption refrigeration system, the refrigerant separates from the absorbent in the ——–.

  33. In absorption system, absorbent absorbs the refrigerant in the —————–.

  34. Mechanical refrigeration system is also called ——————————.

  35.  In the refrigeration system, low pressure  is also named as ——————-, suction pressure and evaporator pressure.

  36.  The other name of high pressure of the refrigeration system is ——————-, discharge pressure and condensing pressure.

  37.  Compressor in the refrigeration system compresses the vapors and increases its —————-and —————.

  38.  Oil separator separates the ——————-from the compressed refrigerant.

  39.  Condensers are air cooled, water cooled and ———————— cooled.

  40. The condenser changes the vapor refrigerant into a ———————-state.

  41. Receiver is a —————————–tank.

  42. Expansion valve changes high pressure liquid refrigerant into —————liquid.

  43. Accumulator —————–the liquid which comes from the evaporator.

  44. Muffler reduces the suction and discharge —————— of the compressor.

  45. —————pipe is used in the ammonia vapor absorption refrigeration system.

  46. There is no ————–part in the vapor absorption refrigeration system.

  47. Gases which are charged in the Electrolux refrigerator are —————-and —————–.


  1. Compressor, Expansion valve,

  2. Saturated,

  3. Dry, saturated,

  4. low, low

  5. pressure, temperature

  6. high, high

  7. pressure, temperature,

  8. high, high

  9. liquid, saturated,

  10. saturated,

  11. 12 , 11,

  12. Ammonia,

  13. R-22,

  14. high,

  15. middle, inlet

  16. outlet, middle

  17. Pressure temperature,

  18. (Cooling),

  19. (Food stuff),

  20. (Hot and humid),

  21. (Cooling),

  22. (Evaporation),

  23. Tons of refrigeration),

  24. (302400),

  25. (12600),

  26. (refrigeration),

  27. (Vapor compression refrigeration system),

  28. (Compressor),

  29. (Desert cooler),

  30. (100C),

  31. (Heat),

  32. (Generator),

  33. (Absorber),

  34. (Vapor compression refrigeration system),

  35. (Back pressure),

  36. (Head pressure),

  37. (Temperature and pressure),

  38. (Lubricating oil),

  39. (Evaporative),

  40. (Liquid),

  41. (Storage),

  42. (Low pressure),

  43. (Stores),

  44. (sound),

  45. (Steel),

  46. (Moving),

  47. (Ammonia and Hydrogen).