When water gets into a refrigeration system, chemical reactions inside the system often create: ...

When water gets into a refrigeration system, chemical reactions inside the system often create:
 
  A) Fluoride crystals. B) Acid. C) Phosgene gas. D) Combustible gas.

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[Ques. 2] The preferred tool for cutting PVC pipe is:
 
  A) A plastic tubing shear. B) A pocket knife.
  C) A circular saw. D) A hacksaw.

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[Ques. 3] What equipment that is NOT required by other torches is required to operate an oxyacetylene torch?
 
  A) Acetylene cylinder B) Regulator for the acetylene cylinder
  C) Hose to connect the regulator to the handle D) Oxygen cylinder

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[Ques. 4] If the refrigerant is recovered improperly from a water-cooled condenser:
 
  A) The oil dissolved in the refrigerant may crystallize.
  B) The water may boil.
  C) All the water may drain out of the condenser.
  D) The water may freeze.

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[Ques. 5] Contaminants that can be found in recovered refrigerant include:
 
  A) Carbon and particulates. B) Oil and noncondensables.
  C) Water and acid. D) Carbon, oil, noncondensables, water, and acid.