To avoid the creation of oxides in the refrigeration lines of ...

[mpobi80]

To avoid the creation of oxides in the refrigeration lines of mini-split systems, the lines are assembled:
 
  A) Using Reflok fittings.
  B) Using standard flare fittings.
  C) By brazing the connections while flowing nitrogen through the lines.
  D) Using heavy-walled flare fittings.

Question 2

What causes the little pops and ticking that can be heard in some furnaces before the blower comes on?
 
  A) Small quantities of water in the gas
  B) Mechanical rattles from an unbalanced indoor blower
  C) Small concentrated pockets of gas that explode
  D) Expansion of the heat exchanger as it heats up

[recede]

Answer to Question 1

D

Answer to Question 2

D

[mpobi80]

TY

[recede]

You're welcome