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Welding Safety & OSHA Regulations Flashcards

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

Read the first 7 Welding Safety & OSHA Regulations flashcards as text

  1. A welder is asked to weld a drum that previously contained a flammable solvent. What is the FIRST required step before welding can begin?

    Answer: Test the drum with an explosimeter and purge or fill with water/inert gas

    Containers that held flammable materials must be tested for explosive vapors and purged or filled with water/inert gas before any hot work, per AWS F4.1 and OSHA guidelines.

  2. Which OSHA permissible exposure limit (PEL) applies to manganese fumes generated during welding operations in general industry?

    Answer: 1.0 mg/m³ as a ceiling value

    OSHA's PEL for manganese fume in general industry is a ceiling value of 1.0 mg/m³ that must not be exceeded at any time.

  3. What is the purpose of a 'hot work permit' system in a facility?

    Answer: To authorize and control ignition sources in areas with fire hazards

    A hot work permit system is a hazard control administrative procedure that authorizes ignition-source activities in areas where fire or explosion risks exist.

  4. When welding outdoors in windy conditions, local exhaust ventilation (LEV) may become ineffective. What is the recommended minimum wind speed threshold that typically requires a windbreak or alternate controls?

    Answer: 4 mph

    Winds exceeding approximately 4 mph can displace local exhaust ventilation capture zones, requiring windbreaks or alternative fume control methods.

  5. Under OSHA 29 CFR 1910.252(a)(2)(iv), when welding near sprinkler systems, the welder must ensure sprinkler heads are protected from spatter. If sprinkler heads are covered, who is responsible for removing the covers after welding?

    Answer: A designated fire watch

    OSHA requires a fire watch to monitor for fire and also to ensure that protective covers on sprinkler heads are removed promptly after hot work is completed.

  6. Which of the following welding fume components is classified as a Group 1 human carcinogen by the International Agency for Research on Cancer (IARC)?

    Answer: Hexavalent chromium (Cr VI)

    Hexavalent chromium (Cr VI), generated when welding stainless steel and chrome-alloy materials, is classified as a Group 1 (definite) human carcinogen by IARC.

  7. A welder notices that the insulation on the electrode holder cable is cracked and the bare copper conductor is partially exposed. According to OSHA electrical safety standards, the welder should:

    Answer: Immediately remove the equipment from service and tag it out

    Damaged insulation exposing conductors creates an electrocution hazard; the equipment must be immediately taken out of service and tagged for repair before further use.