Oxygen content below __________ percent in air contaminated with nitrogen does not support combustion and is unsafe for humane exposure.
Question: Oxygen content below __________ percent in air contaminated with nitrogen does not support combustion and is unsafe for humane exposure.
[A].
18
16
14
12
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.