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Confined Space Quiz

Can you answer these questions?

Question
2
Q
Entering a permit space can prove fatal for an employee when the oxygen level is-
  • (A)  Below 19.5 percent
  • (B)  Above 23.5 percent
  • (C)  Below 20 percent
  • (D)  Both a and b
Give me a hint
Hint:
Too little or too much of something can never be good.
A
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