WCL Safety Standards & Regulations 5

Question 1

In California, which agency issues the Welder Performance Qualification certification that is commonly required by Los Angeles area contractors?

Accepted Answer

The certifying body specified by the applicable code (e.g., AWS, ASME) hired by the employer

Answer

Welder qualification is conducted per the applicable construction or manufacturing code (AWS D1.1, ASME Section IX, etc.) by a qualified employer or third-party testing agency, not a single state agency.

Question 2

What does a 'lockout/tagout' (LOTO) procedure protect against when maintenance welding is performed on machinery?

Accepted Answer

Unexpected energization or startup of equipment during maintenance

Answer

LOTO procedures (OSHA 1910.147) ensure equipment cannot be accidentally energized while welders perform maintenance work.

Question 3

Which type of respirator is required when welding stainless steel due to the hexavalent chromium (Cr VI) in the fumes?

Accepted Answer

A half-face air-purifying respirator with P100 and OV/P100 combination cartridges, or a supplied-air respirator

Answer

Hexavalent chromium is a known carcinogen requiring P100 particulate filtration; supplied-air respirators may be needed at higher concentrations.

Question 4

According to OSHA's Hazard Communication Standard (HCS 2012), where must safety data sheets (SDS) for welding consumables be accessible to workers?

Accepted Answer

In the work area or readily accessible to employees during their shift

Answer

OSHA HCS 2012 requires SDS to be readily accessible to employees during their shifts in their work area.

Question 5

When using oxy-fuel cutting equipment, which condition indicates a flashback and requires immediate equipment shutdown?

Accepted Answer

A squealing or hissing sound in the torch with flame burning back into the hoses

Answer

A squealing sound with the flame retreating into the hoses indicates flashback, a dangerous condition requiring immediate gas shutoff.

(WCL) Welding Certification Los Angeles Practice Test

(WCL) Welding Certification Los Angeles Practice Test

WCL Safety Standards & Regulations 5