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Practice quizzes / VA H H QI Practice Questions - Virginia Highway Heavy Contracting Qualified Individual Examination Exam / Question 197130
Practice question

An oxygen-deficient atmosphere under OSHA excavation and confined-space rules is one that contains less than:

  1. 23.5 percent oxygen
  2. 20.9 percent oxygen
  3. 19.5 percent oxygen
  4. 16.0 percent oxygen

Answer: C — 19.5 percent oxygen

The correct answer is shown above. Try the full quiz for additional practice.

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