The burner assembly and furnace cabinet should be grounded for ...

[2125004343]

The burner assembly and furnace cabinet should be grounded for safety and because:
 
  A) The indoor blower motor will not operate unless the unit is grounded.
  B) The transformer will not operate unless the unit is grounded.
  C) Most control boards for direct spark ignition or hot surface igniters will not operate correctly unless the unit is grounded.
  D) The induced draft fan motor will not operate unless the unit is grounded.

Question 2

Too much primary air or will cause:
 
  A) Higher-than-normal temperature rise. B) Flame rollout.
  C) Delayed ignition. D) The high limit to open.

[smrtceo]

Answer to Question 1

C

Answer to Question 2

C