Mechanical ventilation is required if: A) Confined spaces B) ...

[jrubin]

Mechanical ventilation is required if:
 
  A) Confined spaces B) Ceiling height is less than 16 feet
  C) Room is less than 10,000 cf per welder D) All of the above

Question 2

Gases produced by welding include:
 
  A) Ozone B) Nitrogen dioxide C) Carbon monoxide D) All of the above

[Chelseyj.hasty]

Answer to Question 1

D

Answer to Question 2

D

[jrubin]

Thanks for the timely response, appreciate it

[ryansturges]

Great answer, keep it coming