Question:
If the CO/CO\(_2\) deficiency ratio in a mine is \(2\%\), it indicates
If the CO/CO\(_2\) deficiency ratio in a mine is \(2\%\), it indicates
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A higher CO/CO\(_2\) deficiency ratio indicates increasing severity of spontaneous heating.
\[
\boxed{2\% \Rightarrow \text{Advanced stage of heating}.}
\]
Updated On: Jul 14, 2026
- Existence of spontaneous heating
- Active fire
- Heating in the advanced stage
- No fire
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The Correct Option is C
Solution and Explanation
Step 1: Recall the Graham's ratio (CO/CO\(_2\) deficiency ratio).
The CO/CO\(_2\) deficiency ratio is used to assess spontaneous heating in coal mines.
Step 2: Interpret the given value. A ratio of \[ \boxed{2\%} \] indicates that spontaneous heating has progressed to an \[ \boxed{\text{advanced stage}.} \] Hence, \[ \boxed{(C)} \] is the correct answer.
Step 2: Interpret the given value. A ratio of \[ \boxed{2\%} \] indicates that spontaneous heating has progressed to an \[ \boxed{\text{advanced stage}.} \] Hence, \[ \boxed{(C)} \] is the correct answer.
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