A dent or crater in a pipe can be a hiding place for _____.

A dent or crater in a pipe can be a hiding place for _____.
 
  a. excess flux
  b. oxidation
  c. incorrect filler metal
  d. thick copper deposits

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[Ques. 2] Under what conditions should flux be applied to the inside of the fitting cup?
 
  a. When brazing brass
  b. When brazing bronze
  c. When the fitting will be installed in a corrosive environment
  d. It must always be applied

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[Ques. 3] How far the tubing is installed inside of the fitting is called the _____.
 
  a. insertion length
  b. tubing length
  c. insertion depth
  d. cup depth

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[Ques. 4] Before brazing, the outside of the tubing should be cleaned to a _____.
 
  a. satin finish
  b. dull finish
  c. bright finish
  d. dark finish

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[Ques. 5] Which of the following is a function of brazing flux?
 
  a. Floats out oxides ahead of the filler metal
  b. Bonds to the base metal
  c. Causes oxidation
  d. Prevents wetting of the metals