Mine Gases

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lead acetate paper

A simple test may be made to detect Hydrogen Sulfide with___________ , which turns a shiny brown

0.02%

Carbon Monoxide percent concentration in which a man suffered headache and become disabled

0.1 to 0.15%

Hydrogen Sulfide percent concentration the proves fatal

4.1 to 75%.

Hydrogen's explosive range when mixed with air is from

Hydrogen Sulfide

It has an offensive odor.

Black Damp

It is a mixture of carbon dioxide and nitrogen of variable composition.

Carbon Dioxide

It is a product of complete combustion and is given off by men and animals, by burning lamps, by mine fires, by decaying timbers and during the explosion of powder.

Carbon Monoxide

It is also a product of mine explosions and is given off by a gasoline motors and during the detonation of negatively oxygen-balanced exposives

Carbon Dioxide

It is colorless and odourless but has a distinctly acid taste.

Carbon Monoxide

It is colorless, odourless and extremely poisonous.

marsh gas

It is commonly called Methane.

Hydrogen

It is formed from gas or coal dust explosions, in the flumes from explosives, and by acid water acing on the metal.

Methane

It is odorless, colorless and tasteless, and burns with a pale blue flame.

Nitrogen Dioxide

It is produced by the incomplete detonation of some explosives.

Hydrogen Sulfide

It is produced in some mineral springs and in mines during blasting and an occasional constituent of feeders of gas and gases resulting from a mine explosion.

Oxygen

It is removed from the air by the breathing of men and animals, by the burning of lamps, by the decay of timber and by mine cars.

Nitrogen Dioxide

It is the most dangerous of mine gases

Black Damp

It will extinguish lights if it is present in sufficient quantity to lower the oxygen content of the air below the point at which it will support combustion

potassium iodide and starch

Nitrogen Dioxide can be detected by paper soaked in a solution of _________________

18%

Percent Concentration of Carbon Dioxide where suffocation and death occur

13%

Percent Concentration of Oxygen where breathing becomes very labored and life is in danger.

Hydrogen

Specific gravity is 0.06936.

Methane

Specific gravity is 0.559.

Carbon Monoxide

Specific gravity is 0.967

Oxygen

Specific gravity is 1.1056

Hydrogen Sulfide

Specific gravity is 1.1912.

Carbon Dioxide

Specific gravity is 1.529

Nitrogen Dioxide

Specific gravity is 1.5895

5.0 to 13.9%

The explosive range in air of methane

After Damp

This term is applied to the gases present in a mine after an explosion of methane or coal dust

Carmine

are used in some mines because they are much susceptible to carbon monoxide than men, and if carried into an atmosphere containing a dangerous percentage of the gas. They will fall from their perch before men are affected


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