What is a firedamp? A. a blanket-like object used to extinguish fires B. the remnants of a fire after it has been extinguished C. a fire extinguisher that uses water to extinguish a fire D. a buildup of mostly methane gas, which is potentially explosive
Answer: D. A buildup of mostly methane gas, which is pontentially explosive.
Explanation:
Firedamp refers to a gas mixture, largely methane, that appear in underground coal mines. It is explosive at concentrations between 5 and 10% in the air.
