FILL IN THE BLANKS FOR REFRIGERANTS

 

FILL IN THE BLANKS FOR REFRIGERANTS

  1. The gas which is a working substance in a refrigerating system is called the ————————-.
  2. Refrigerant is used for producing———————in the evaporator.
  3. The chemical formula for R-22 is———————————.
  4. The gas which serves as a medium of transferring heat from one place to ——is called refrigerant.
  5. Ammonia boils at —— and freezes at———-at atmospheric pressure.
  6. The latent heat of ammonia is —————-.
  7. Ammonia is not corrosive to ———————-.
  8. The chemical formula of R-134a is —————–.
  9. The boiling point of R-22 is—————–.
  10. The boiling point of R-134a is ————-.
  11. The practical use of carbon dioxide in refrigeration is in the form of ——————-.
  12. In a Freon gas the hydrogen atoms are replaced by——————– and—————-.
  13. Name the compound of R-22—————————-.
  14. Name the compound of R134a————————–.
  15. Usually a solution of ————— and salt is called a brine solution.
  16. The most common salts used for making brine solution are sodium chloride and——————.
  17. Brine solution is used for making ice and———————–.
  18. The freezing point of calcium chloride is——————–.
  19. The most common method of locating the leakage of refrigerant is by using—————.
  20. The leakage should be tested when the cooling plant is at——————.
  21. The leakage of Freon refrigerant is found by using —————.
  22. .The latent heat of water is——————–
  23. Ammonia is highly corrosive to————–..
  24. Generally —–gas is used for flushing the refrigeration system and also for testing the leakage.
  25. Liquid refrigerant at low pressure ————–quickly in the evaporator..

 

ANS: 1.Refrigerant,2. Cooling, 3. CHClF2, 4.Another, 5.—33.50C and –780C, 6.1371 kJ/kg, 7mild steel, 8. C2H2F4, 9.—410C, 10. –270C, 11.Dry ice, 12.Chlorine and Fluorine, 13. Mono-chloro-difluoro-methane, 14. Tetra fluoro ethane, 15.Water, 16. Calcium chloride, 17.Ice-cream, 18.  –460C, 19. Soap solution, 20. Rest, 21.Halide torch, 22. 2257 kJ/kg, 23.Copper, 24. Carbon dioxide, 25. Evaporates. .