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HS&E RAAC practice question: Brazing and hot work (4 of 5)

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

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You are soldering small pipe joints with a rosin-based flux in a small room.

What does HSE say about the fume?

Choose one answer.

  1. A. It only smells, so it can't do you any harm at all
  2. B. It is good for clearing your nose
  3. C. Rosin in the flux can harm health
  4. D. It is just harmless steam
Show the answer and explanation

Answer: C

  • A. Wrong: Wrong. HSE warns about rosin.
  • B. Wrong: Wrong. HSE warns about rosin.
  • C. Right: Right. HSE says serious health problems can come from rosin (colophony) in solder fluxes.
  • D. Wrong: Wrong. HSE warns about rosin.

Explanation

Rosin (colophony) in solder flux fume can harm health. Control the fume.

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