Nozzles for welding guns are generally more ________ than nozzles used for GMAW.

Nozzles for welding guns are generally more ________ than nozzles used for GMAW.
 
  A) Heavy duty
  B) Expensive
  C) Light duty
  D) All of the above
  E) None of the above

 Q. 2

The ________ technique produces a more convex weld bead with deeper penetration.
 
  A) Intermittent
  B) Backhand, or drag
  C) Forehand, or push
  D) All of the above
  E) None of the above

 Q. 3

What is the purpose of the draft switch?
 
  A) to verify that the indoor blower is on
  B) to verify that the burners are operating
  C) to verify that the gas valve is open
  D) to verify that the draft is working before energizing the igniter or energizing the gas valve