Mine Gases and Disaster Situations

Flashcards about mine gases and disaster situations

When the oxygen content of air drops to about 17 percent, you'll begin to __.

Faster and deeper breathing

A 15 percent concentration of oxygen will cause __.

Dizziness and headaches

If the oxygen content of the air you're breathing drops as low as 9 percent, you may __.

Loss of consciousness

The four main causes of oxygen deficiency in the mine are __.

Insufficient or improper ventilation, displacement of oxygen by other gases, a fire or explosion, and consumption of oxygen by workers

__ are used to detect oxygen-deficient atmospheres.

Modern electronic oxygen indicators

Carbon monoxide's explosive range in normal air is __.

12. 5 to 74.2 percent

Carbon monoxide is so toxic because it __.

Combines easily with your red blood cells (hemoglobin)

The first symptom of carbon monoxide poisoning is __.

A slight tightening across your forehead and possibly a headache

Carbon monoxide is a product of __.

The incomplete combustion of any carbon material

Nitrogen is detected by __.

Chemical analysis

Carbon dioxide causes you to breathe deeper and faster when present in high concentrations, such as __.

2 percent or higher

You can use a ___ to test for carbon dioxide.

Carbon dioxide detector, a multi-gas detector, or chemical analysis

Clean, dry air at sea level is made up of ___.

78 percent nitrogen and 21 percent oxygen

Fires and explosions can disrupt ventilation by __.

Damaging ventilation controls

Falls and rock bursts can disrupt ventilation by __.

Obstructing the flow of air

For all mines, rescue teams must know how to test for __.

Oxygen deficiency and carbon monoxide.

Oxygen is not an explosive gas, but it __.

Supports combustion