Q147
The gas that usually causes explosions in coal mines is
A.
Hydrogen
B.
Carbon monoxide
C.
Air
D.
Methane
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
There are two main types of coalmine explosions: methane and coal dust. Methane explosions occur when a buildup of methane gas contacts a heat source and there is not enough air to dilute the gas level below its explosion point.