ГАЗОХИМИЯ 3 ЧАСТЬ

<question>>In metallurgy, the following indicators are used to determine the velocity of gas flows in blast furnaces and gas pipelines:

• padon

• oxygen

• hydrogen

• helium

• no gas is used

<question>In geology, the measurement of what gas content in air and water is used to search for depositsof uraniumandthorium

• of radon

• of oxygen

• of nitrogen

• of argon

• no gas is used

<question>What should be the oxygen content (by volume) in the air of workings in which people are or may be located?

• at least 21%

• at least 18%

• at least 30%

• at least 70

• at least 60

<question>What should be the content of carbon dioxide (carbon dioxide) in the mine air at work sites, in the outgoing streams of excavation sites and dead-end workings?

• must not exceed 0.5%

• must not exceed 0.75%

• must not exceed 1%

• must not exceed 1.5%

• must not exceed 2%

<question>The content of carbon dioxide (CO2) in the mine air in workings with the outgoing jet of the wing of the mine, the horizon and the mine as a whole should not exceed

• 0,75%;

• 0,5%

• 1%

• 2%

• 1,5%

<question>The maximum permissible concentration of hydrogen (H) in the charging chambers is

• 0,5%;

• 0,75%;

• 1%

• 2%

• 1,5%

<question>The maximum permissible concentration of carbon monoxide (CO) in active mine workings is, % (by volume)

• 0,0017%

• 0,00010%

• 0.00040%

• 0.00030%

• 0.00080%

<question>The temperature of the air entering the mine workings must not be lower than>

• 20With

• 50With

• 40With

• 90With

• 70With

<question>Types of methane gas release->

• ordinary, vented, sudden

• local, layered

• local, layered, full

• ordinary and local

• no correct answers

<question>Types of methane gas accumulation->

• local, layered, and full gassing of the workings

• ordinary, vented, sudden;

• lower, middle, upper;

• vented, sudden;

• no correct answers