AWS Safety & Welding Standards 2

Question 1

According to AWS Z49.1, what is the minimum air change rate required in a confined space during welding?

Accepted Answer

6 air changes per hour

Answer

AWS Z49.1 requires a minimum of 6 air changes per hour in confined spaces to maintain safe ventilation during welding.

Question 2

What ANSI/AWS standard specifically addresses safety in welding, cutting, and allied processes?

Accepted Answer

AWS Z49.1

Answer

AWS Z49.1 is the primary standard titled 'Safety in Welding, Cutting, and Allied Processes.'

Question 3

When welding on containers that held flammable materials, AWS standards require the welder to:

Accepted Answer

Fill the container with water or inert gas before welding

Answer

AWS Z49.1 mandates that containers previously holding flammables be purged with water or inert gas to eliminate explosion risk.

Question 4

Which eye protection shade is generally recommended for shielded metal arc welding (SMAW) at currents between 75–200 amps?

Accepted Answer

Shade 10

Answer

ANSI/AWS guidelines recommend shade 10 lens for SMAW operations in the 75–200 amp range.

Question 5

Under OSHA 1910.252, what is the maximum allowable iron oxide fume concentration in the welder's breathing zone?

Accepted Answer

5 mg/m³

Answer

OSHA's permissible exposure limit (PEL) for iron oxide fume is 5 mg/m³ as an 8-hour time-weighted average.

AWS Practice Test