Question

Identify the statement that is true about coal-bed fires.

Answer 1

Answer:

The correct answer is B. They cannot start from spontaneous combustion; an "outside event" is necessary

Explanation:

Coal bed fires cannot start from spontaneous combustion; an "outside event" is necessary

Answer 2

Answer:

A. They are extremely difficult to extinguish because fuel obviously is abundant and oxygen can enter easily, even through joints in surrounding rock.

Explanation:

Coal bed fires refers to spontaneous combustion which are triggered by human activity (mining), lightning, wildfires etc.

This usually happen underground when the coal beds are exposed to oxygen as a result of mining activities or human induced fires or combustion.