mine gases

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Author:
alicia0309
ID:
91857
Filename:
mine gases
Updated:
2011-06-23 23:52:02
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mine gases
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Description:
Mine Gases, Coal Mine Foreman Test
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  1. what is oxygen?
    A) it is a tasteless, odorless, colorless gas which supports life and combustion
    B) an explosive gas that gives off a foul odor
    C) it is a tasteless, colorless, odorless gas that does not support life
    D) it is a colorless, tasteless gas that gives of a foul odor
    A
  2. What percent oxygen can a person most easily work in?
    A) 21%
    B) 17%
    C) 10%
    D) 50%
    A
  3. What percent oxygen will a person breathe faster and deeper?
    A) 25%
    B) 21%
    C) 17%
    D) 30%
    C
  4. The Earth's atmosphere consists of what percert oxygen?
    A) approx 3/4 or 75%
    B) approx 1/2 or 50%
    C) approx 1/5 or 20%
    D) approx 1/4 or 25%
    C
  5. What is notrogen?
    A) it is a tasteless, odorless, and colorless gas which will neither support life nor combustion
    B) it is an explosive gas that gives off a foul odor
    C) it is a colorless, tasteless, odorless gas that supports combustion
    A
  6. The Earth's Atmosphere consists of what percent nitrogen?
    A) approx 4/5 or 80%
    B) approx 1/5 or 20%
    C) approx 1/2 or 50%
    D) approx 1/4 or 25%
    A
  7. What is carbon dioxide (CO2)?
    A) it is colorless gas with a foul odor which is combustible
    B) it is a gas formed by the chemical combination of sulfur and oxygen
    C) carbon dioxide is a colorless, odorless, combustible gas
    D) carbon dioxide is a colorless and odorless gas formed by the chemical combination of carbon and oxygen
    D
  8. What is the specific gravity of carbon dioxide?
    A) 0.555
    B) 1.000
    C) 0.967
    D) 1.529
    D
  9. WHere might concentrated accumulations of carbon dioxide ordinarily be found?
    A) Near the roof
    B) Near the floor, in inadequately ventilated places
    C) Along belt lines
    D) In well ventilated places
    B
  10. How is carbon dioxide detected?
    A) by the galvanometer
    B) by the iodine peroxide
    C) by the protannic acid method
    D) usually by chemical analysis
    D
  11. What percent of carbon dioxide is given off by the body during exhalation?
    A) approx 2.6 to 6.6 percent
    B) approx 26 to 66 percent
    C) approx 16 to 20 percent
    D) approx 1.6 to 2.0 percent
    A
  12. What is methane (CH4)?
    A) a colorless, odorless and tasteless combustible gas
    B) a colorless, odorless and tasteless poisonous gas
    C) a colorless, odorless and tasteless gas which supports combustion
    D) it is the chemical combination of oxygen and hydrogen
    A
  13. What is the specific gravity of methane?
    A) 1.529 5
    B) 1.967
    C) .555
    D) 1.000
    C
  14. where is methane usually found in mines?
    A) in all panel workings and along the floor
    B) along all longwall faces
    C) along the roof, to the rises, in the vicinity of working faces, in dead ends and above falls
    D) in all dip workings
    C
  15. What is firedamp?
    A) an explosive mix of hydrogen and air
    B) an explosive misture of methane and air
    C) an explosive mixture of carbon monoxide and air
    D) an explosive mixture of carbon dioxide and air
    B
  16. what is the range of explosibility for methane?
    A) between 1.5% and .5%
    B) between 2% and 12.5%
    C) between 5% and 15%
    D) between 15% and 20%
    C
  17. what is the percentage of methane required for maxium explosive violence?
    A) 5%
    B) 10%
    C) 15%
    D) 20%
    B
  18. What is the percentage of oxygen below which no explosion of methane air mixture can occur?>
    A) 12%
    B) 5%
    C) 16.5%
    D) 20%
    A
  19. What effect does atmosphere with reduced oxygen content have upon the explosibility of methane?
    A) A small amount of methane is necessary to cause an explosion
    B) Methane's explosive limit does not change
    C) A greater percentage of methane is necessary to start an explosion in an atmosphere which contains less than the normal percentage of oxygen
    D) Methane's ignition temperature increases
    C
  20. What effect does coal dust in the air have upon the explosibility of methane?
    A) the lower explosive limit is increased
    B) the upper explosive limit is increased
    C) the upper explosive limit is decreased
    D) the lower explosive limit is decreased
    D
  21. what dangerous gas is most likely to be encountered above a pillar fall?
    A) methane
    B) carbon monoxide
    C) carbon dioxide
    D) Hydrogen sulfide
    A
  22. if a split of air above 20,000 cubic feet per minute contains 3% methane how many cubic feet per minute would be required to reduce the methane content?
    A) 6,666 cubic feet
    B) 600,000 cubic feet
    C) 80,000 cubic feet
    D) 60,000 cubic feet
    D
  23. what is the least percentage of methane that can be detected with a flame safety lamp?
    A) .3%
    B) .75%
    C) 1%
    D) .5%
    C
  24. what is meant by the diffusion of gases?
    A) their tendency to volatilize
    B) their tendency to escape confinement
    C) their capacity to absorb water
    D) their mixing with each other when they contact
    D
  25. where is methane normally found?
    A) since methane's specific gravity is 0.555 which indicates that it is lighter than air, it is normally found in high places
    B) since methane's specific gravity is 0.555, it is normally found in low places
    C) methane is normally found at the working areas of the mine
    D) methane is normally found in abandoned or worked out areas of the mine
    A
  26. what is carbon monoxide?
    A) it is a colorless, odorless, tasteless, inert gas
    B) it is a colorless, odorless, tasteless, combustible, and poisonous gas
    C) it is a colorless, combustible gas with a disagreeable odor
    D) it is a colorless, odorless, tasteless gas supporing combustion
    B
  27. what is the source of carbon monoxide?
    A) it is the result of inadequate ventilation
    B) it is produced as a result of the use of explosives
    C) it is the product of incomplete combustion (combustion with an insufficiency of oxygen)
    D) it is produced when batteries are charged
    C
  28. what is afterdamp?
    A) the atmosphere deficient in oxygen
    B) the atmosphere containing carbon monoxide and oxygen
    C) the atmosphere following an explosion containing carbon dioxide, carbon monoxide, decreased oxygen, nitrogen, hydrogen, and smoke
    D) the atmosphere containing sulfur dioxide
    C
  29. what is the principal poisonous gas produced by explosives?
    A) ammonia nitrate
    B) carbon monoxide
    C) nitrogen peroxide
    D) carbon dioxide
    B
  30. how much greater affinity does hemoglobin have for carbon monoxide than for oxygen?
    A) about 500 times
    B) about 300 times
    C) about 200 times
    D) about 1,000 times
    B
  31. what is the specific gravity of carbon monoxide?
    A) 0,967
    B) 1.529
    C) 0.555
    D) 1.000
    A
  32. what is hydrogen (H2)?
    A) it is a colorless, explosive gas with a foul odor
    B) it is a colorless, and tasteless gas
    C) it is a colorless, odorless, tasteless, nonexplosive gas
    D) it is a colorless, odorless, tasteless, poisonous gas
    B
  33. what is the specific gravity of hydrogen?
    A) it is the heaviest of all gagses. Specifif gravity 1.529
    B) the specific gravity is 0.555
    C) it is the lightest of all gases. specific gravity 0.07
    D) the specific gravity in 0.967
    C
  34. what is the explosive range of hydrogen?
    A) from 4.1% to 7.4%
    B) from 41% to 74%
    C) from 4.1% to 74%
    D) from 7.4% to 41%
    C
  35. what is the ignition temperature of hydrogen?
    A) 655 degree fahrenheit
    B) 1,200 degree fahrenheit
    C) 1,190 degrees fahrenheit
    D) 935 degrees fahrenheit
    D
  36. how is hydrogen detected?
    A) by the use of litmus paper
    B) by the Riken gas detector
    C) by the Bacharach lectronic Canary
    D) by chemical analysis
    D
  37. what mine gas can be detected by it odor?
    A) hydrogen sulfide
    B) carbon monoxide
    C) methane
    D) carbon dioxide
    A
  38. what is the specific gravity of hydrogen sulfide?
    A) 0.555
    B) 1.191
    C) 1.529
    D) 0.967
    B
  39. what is the range of explosibility of hydrogen sulfide?
    A) 4.6% to 43
    B) 43% to 46%
    C) 4.3% to 46%
    D) 4.3% to 4.6%
    C
  40. what is the most violent explosive point of hydrogen sulfide?
    A) 46%
    B) 15%
    C) 14%
    D) 10%
    C
  41. what is the temperature of ignition of hydrogen sulfide?
    A) 655 degrees fahrenheit
    B) 1,300 degrees fahrenheit
    C) 960 degrees fahrenheit
    D) 1,200 degrees fahrenheit
    A
  42. what percentage of hydrogen sulfide will become dangerous after a 1/2 hour?
    A) .005 to .07
    B).5 to .8
    C) .10
    D) .25 to .30
    A
  43. what is the specific gravity of sulfur dioxide?
    A) 1/529
    B) 2.263
    C) 0.555
    D) 0.967
    B
  44. what is the particular danger of sulfur dioxide?
    A) it is extremely combustibile
    B) it causes oxygen deficiency
    C) it is extemely poisonous even in small amounts
    D) it may cause coal dust explosions
    C
  45. what is the first effect on a person exposed to sulfur dioxide?
    A) it is extremely irritating and suffocating and is tolerable to breathe
    B) lung ventilation is increased
    C) the eyes water
    D) it has the odor of rotten eggs
    A
  46. what is nitrogen peroxide?
    A) it is non-poisonous, incombustibile gas
    B) it is extremely poisonous gas frequently formed by the burning of high explosives
    C0 it is a combustibile non-poisonous gas, yellow in color
    D) it is a poisonous gas with a foul odor
    B
  47. what is the specific gravity of nitrogen peroxide?
    A) 1.589
    B) .967
    C) 1.191
    D) 1.529
    A
  48. what percentage of nitrogen peroxide will be fatal?
    A) a concentration of one percent 1%
    B) an extremely low concentration of one thousandths of one percent 0.001%
    C) a concentration of one tenth of one percent 0.1%
    D) extremely low concentrations, probably about one hundredth of one percent 0.01%
    D
  49. how may traces if nitrogen peroxide be detected?
    A) a paper soaked in a solution of starch and potassium iodine will turn blue when exposed to nitrogen peroxide
    B) a paper soaked in a solution of acetate of lead
    C) by a flame safety lamp
    D) by a chemical analysis
    D
  50. what is the particular danger of nitrogen peroxide?
    A) it is extremely explosive
    B) relatively small quanities may cause death even after apparent recovery
    C) poisonous but only in large quanities
    D) there is no danger
    B

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