Spontaneous combustion of coal on storage results due to___________________?
Correct answer: B. All A., B. and C.
- A. Inadequate ventilation
- B. All A., B. and C.
- C. Storage in large heaps with small surface to volume ratio
- D. Low temperature oxidation
Explanation
Coal can undergo slow, low-temperature oxidation, and inadequate ventilation or large heaps prevent the generated heat from escaping. These conditions allow the temperature to rise until spontaneous combustion occurs, so all three statements apply.
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