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jouranngreen108 jouranngreen108
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6 years ago
Which substance is not found in CFC refrigerants?
 
  a. Chlorine
  b. Carbon
  c. Fluorine
  d. Hydrogen


[Ques. 2] The refrigerant that has primarily replaced CFC-12 is _____.
 
  a. HFC-134a
  b. HFC-411
  c. HCFC-22A
  d. HFC-404A


[Ques. 3] What is commonly done when a drop-in refrigerant is placed in operating equipment?
 
  a. A crankcase heater is installed.
  b. The oil is replaced.
  c. A leak-detecting dye is added.
  d. The refrigerant piping is replaced.


[Ques. 4] What characteristic must a refrigerant have if it is used as a drop-in replacement for another refrigerant?
 
  a. Similar molecular structure
  b. Compatible with existing compressor oil
  c. Similar operating pressures and temperatures
  d. Higher flammability


[Ques. 5] Using steel piping in a refrigeration system that uses ammonia will prevent _____.
 
  a. fire
  b. explosion
  c. corrosion
  d. contamination
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Klove4Klove4
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6 years ago
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6 years ago
Thanks for your help!
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