AWS Safety Procedures & PPE 2

Question 1

What shade lens is generally recommended for shielded metal arc welding (SMAW) at 200–250 amperes?

Accepted Answer

Shade 12

Answer

AWS and ANSI Z49.1 recommend shade 12 for SMAW operations in the 200–250 ampere range.

Question 2

Which type of fire extinguisher is appropriate for an electrical fire in a welding shop?

Accepted Answer

Class C (CO2 or dry chemical)

Answer

Class C extinguishers use non-conductive agents like CO2 or dry chemical, making them safe for electrical fires.

Question 3

When welding in a confined space, what is the minimum oxygen concentration required to ensure a safe breathing atmosphere?

Accepted Answer

19.5%

Answer

OSHA requires a minimum of 19.5% oxygen for a safe atmosphere; below this level is considered oxygen-deficient.

Question 4

What does the term 'hot work permit' require before welding begins in a facility?

Accepted Answer

A written authorization documenting hazard review and fire watch assignment

Answer

A hot work permit is a formal written document that records hazard assessments, precautions, and designates a fire watch.

Question 5

Which personal protective equipment is specifically required to protect a welder's hands from spatter and heat?

Accepted Answer

Leather welding gloves

Answer

Leather welding gloves provide the necessary heat resistance, flame resistance, and protection from spatter.

AWS Practice Test