Certified Welder Safety Practices & Equipment Handling 3 — Questions and Answers
Question 1: When should a welding helmet's auto-darkening filter (ADF) be replaced or taken out of service?
- Every 6 months regardless of condition
- When the lens is cracked, fogged, or fails to darken consistently (Correct answer)
- After every 100 hours of use
- Only when the batteries die
Correct answer: When the lens is cracked, fogged, or fails to darken consistently
An ADF that fails to darken, has a cracked lens, or shows inconsistent switching must be removed from service immediately to prevent arc eye injuries.
Question 2: What is the correct procedure for handling a backfire (flame goes out and pops) on an oxy-fuel torch?
- Immediately open both valves further
- Close both valves and let the torch cool before relighting (Correct answer)
- Shake the torch vigorously
- Continue welding as it will self-correct
Correct answer: Close both valves and let the torch cool before relighting
After a backfire, close both oxygen and fuel valves immediately, allow cooling, inspect the tip for blockage or damage, then relight following proper procedure.
Question 3: Which OSHA standard primarily governs welding, cutting, and brazing safety in general industry?
- 29 CFR 1910.119
- 29 CFR 1910.252 (Correct answer)
- 29 CFR 1910.134
- 29 CFR 1910.303
Correct answer: 29 CFR 1910.252
29 CFR 1910.252 is the OSHA standard specifically covering safety requirements for welding, cutting, and brazing in general industry workplaces.
Question 4: What does the term 'flash burn' or 'arc eye' refer to?
- Burns caused by hot metal spatter on skin
- UV radiation-induced corneal inflammation from unprotected arc exposure (Correct answer)
- A fire started by welding sparks
- Electrical burns from improper grounding
Correct answer: UV radiation-induced corneal inflammation from unprotected arc exposure
Arc eye (photokeratitis) is a painful corneal inflammation caused by UV radiation exposure from welding arcs, similar to a sunburn on the eye surface.
Question 5: What is the purpose of a welding screen or curtain in a shared work area?
- To reflect heat back to the welder for efficiency
- To protect nearby workers from arc flash, spatter, and UV radiation (Correct answer)
- To reduce noise levels in the shop
- To contain welding fumes in one area
Correct answer: To protect nearby workers from arc flash, spatter, and UV radiation
Welding screens and curtains shield coworkers from arc flash, UV/IR radiation, and spatter without requiring them to wear full welding PPE.
Question 6: When using an angle grinder near welding operations, which additional hazard must be managed?
- Increased oxygen consumption
- Grinding sparks igniting nearby combustibles or welding fumes (Correct answer)
- Electromagnetic interference with welding equipment
- Nitrogen buildup in the workspace
Correct answer: Grinding sparks igniting nearby combustibles or welding fumes
Grinding sparks can travel significant distances and ignite combustible materials or concentrated welding fumes, requiring a clear work area and fire watch.
Question 7: What does SDS (Safety Data Sheet) Section 8 specifically provide for welding consumables?
- Physical and chemical properties
- Exposure limits and required engineering controls and PPE (Correct answer)
- First aid measures
- Reactivity and stability information
Correct answer: Exposure limits and required engineering controls and PPE
SDS Section 8 (Exposure Controls/Personal Protection) lists permissible exposure limits (PELs), threshold limit values (TLVs), and required ventilation and PPE for the material.
Certified Welder Safety Practices & Equipment Handling 3
When should a welding helmet's auto-darkening filter (ADF) be replaced or taken out of service?