Practice Test Geeks(WCL) Welding Certification Los Angeles Practice Test
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Safety Standards & Regulations Flashcards

7 cards from real WCL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Safety Standards & Regulations flashcards as text

  1. What hazard is created when welding is performed near degreasing solvents or chlorinated hydrocarbons such as trichloroethylene?

    Answer: Phosgene gas formation from UV arc decomposition of the solvent

    UV radiation from the welding arc can decompose chlorinated solvents into phosgene, a highly toxic gas.

  2. Under Los Angeles city fire code, a hot work permit for welding inside a building must be posted where during the work?

    Answer: At the worksite, visible to workers and inspectors

    Hot work permits must be posted at the actual work location so all workers and fire inspectors can verify authorization.

  3. Which OSHA standard specifically requires employers to conduct atmospheric testing before and during welding in a permit-required confined space?

    Answer: 29 CFR 1910.146

    OSHA 29 CFR 1910.146 governs permit-required confined spaces and mandates atmospheric testing before entry and continuously during work.

  4. What does the acronym 'SDS' stand for in the context of welding hazard communication?

    Answer: Safety Data Sheet

    SDS stands for Safety Data Sheet, which provides hazard information for chemicals and materials encountered in welding.

  5. According to AWS F4.1, before welding or cutting is performed on a container that held flammable or combustible material, the container must be:

    Answer: Cleaned and purged to remove all residue and tested to confirm safe atmosphere

    AWS F4.1 requires thorough cleaning, purging, and atmospheric testing to confirm the container is safe before any hot work.

  6. What is the minimum air flow rate per welder specified by OSHA for natural or mechanical ventilation when welding in a room?

    Answer: 2,000 cubic feet per minute per welder

    OSHA 1910.252(c) specifies a minimum of 2,000 CFM of air flow per welder in general welding areas without local exhaust ventilation.

  7. Which marking on a compressed gas cylinder indicates it has passed the required hydrostatic pressure test?

    Answer: A stamped date and inspector symbol on the cylinder shoulder

    DOT regulations require hydrostatic test dates and inspector markings to be permanently stamped on the cylinder shoulder.