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HS&E PFW practice question: Other welding health risks (4 of 5)

E. Specialist: HVACR – pipefitting and welding A free question from our original HS&E PFW practice exam. Try it, then open the answer to see why each option is right or wrong.

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A welder is using argon shielding gas inside a small, enclosed tank.

What is the danger?

Choose one answer.

  1. A. Argon is only dangerous outdoors
  2. B. It can push out the oxygen
  3. C. Argon makes the weld weaker, nothing more
  4. D. Argon smells strongly, so you'll notice it
Show the answer and explanation

Answer: B

  • A. Wrong: Wrong. It is most dangerous in enclosed spaces.
  • B. Right: Right. HSE says welding in confined spaces can lead to death from asphyxiation, as shielding gases such as argon can build up and displace oxygen.
  • C. Wrong: Wrong. The danger is lack of oxygen.
  • D. Wrong: Wrong. Argon can build up unnoticed.

Explanation

In confined spaces, shielding gases like argon can displace oxygen and suffocate you.

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