everyday science MCQ #4279

The gases used by divers as an artificial atmosphere are helium and:

everyday science MCQ #4279

  1. Question 1

    Q1. The gases used by divers as an artificial atmosphere are helium and:

    • A) Nitrogen
    • B) Oxygen
    • C) Neon
    • D) Carbon monoxide

    Answer: Oxygen

    Explanation: Divers use a helium-oxygen (heliox) mixture because helium does not cause nitrogen narcosis at depth, making it far safer than breathing compressed air.