CMR 2017, Chapter-1, MCQ Practice Set-3

  1. In an Underground mine, a drill machine has drilled more than 3 meter of drill hole and then blasted using detonators, can it be termed as deep hole drilling and blasting?
    A. Yes
    B. No
    C. May be
    D. None of the above
    B. No, The term is defined only for opencast mines.
  2. “flame proof enclosure” shall have the same meaning as defined under the
    A. Central Electricity Authority (Measures Relating to Safety and Electric Supply) Regulations, 2010;
    B. Mines Act 1952
    C. CMR 2017
    D. None of the above
    A. Central Electricity Authority (Measures Relating to Safety and Electric Supply) Regulations, 2010;
  3. In a broad sense, what is a “flameproof enclosure” ?
    A. it is a box or enclosure
    B. Machine
    C. flameproof machine
    D. flameproof equipment
    A. it is a box or enclosure
  4. What happens to a flameproof enclosure when an explosion occurs due to inflammable gas just outside of it?
    A. inflammable gas shouldn’t enter the enclosure
    B. inflammable gas may enter the enclosure and can damage it but will not communicate its explosion to outside the enclosure.
    C. inflammable gas may enter the enclosure but will not damage the enclosure and will not communicate its explosion to outside the enclosure.
    D. None of the above
    C. inflammable gas may enter the enclosure but will not damage the enclosure and will not communicate its explosion to outside the enclosure.
  5. As per CMR 2017, “Form” means a form
    A. of DGMS Vacancy
    B. specified by an order or instruction by Chief Inspector under these regulations
    C. Mentioned in CMR 1957
    D. Mentioned in The Mines Act 1952
    B. specified by an order or instruction by Chief Inspector under these regulations
  6. “Definitions.” is mentioned in which Regulation no. of this CMR 2017?
    A. 2
    B. 3
    C. 4
    D. 5
    A. 2
  7. In CMR 2017, Total no. of Regulations are?
    A. 260
    B. 261
    C. 262
    D. 263
    A. 260
  8. In CMR 2017, total no. of “Chapters” are?
    A. 13
    B. 16
    C. 15
    D. 17
    D. 17
  9. ” gas” includes
    A. fume or vapour
    B. LPG
    C. Coal
    D. None of the above
    A. fume or vapour
  10. Degree of gassiness applies to which type of mines?
    A. opencast
    B. underground
    C. both opencast and underground
    D. None of the above
    B. underground
  11. “gassy seam of the first degree” means a coal seam or part thereof lying within the precincts of a mine not being an open cast working whether or not inflammable gas is actually detected in the general body of the air at any place in its workings below ground, or when the percentage of the inflammable gas, if and when detected, in such general body of air ______________ and the rate of emission of such gas does not exceed one cubic meter per tonne of coal produced;
    A. does not exceed 0.1 
    B. does not exceed 0.01 
    C. does not exceed 0.001 
    D. does not exceed 0.001 
    A. does not exceed 0.1 
  12. “gassy seam of the second degree” means a coal seam or part thereof lying within the precincts of a mine not being an open cast working in which the percentage of inflammable gas in the general body of air at any place in the workings of the seam is more than 0.1 or the rate of emission of inflammable gas per tonne of coal produced ______________;
    A. exceeds one cubic meter but does not exceed ten cubic meters;
    B. exceeds one cubic meter but does not exceed twenty cubic meters;
    C. exceeds two cubic meter but does not exceed ten cubic meters;
    D. exceeds one cubic meter but does not exceed ten thousand cubic meters;
    A. exceeds one cubic meter but does not exceed ten cubic meters;
  13. “gassy seam of the third degree” means a coal seam or part thereof lying within the precincts of a mine not being an open cast working in which the rate of emission of inflammable gas per tonne of coal produced___________________;
    A. exceeds twenty cubic meters;
    B. exceeds ten cubic centimeters;
    C. exceeds ten cubic meters;
    D. doesn’t exceeds ten cubic meter
    C. exceeds ten cubic meters;
  14. If the percentage of inflammable gas is more than 1 percent then what will be the gassiness of the seam?
    A. First Degree as per definition
    B. Second Degree as per definition
    C. Third Degree as per definition
    D. None of the Above
    B. Second Degree as per definition
  15. If the percentage of inflammable gas is less than 0.1 percent and the rate of emission of inflammable gas per tonne of coal produced exceeds ten cubic meters then what will be the gassiness of the seam?
    A. First Degree as per definition
    B. Second Degree as per definition
    C. Third Degree as per definition
    D. None of the Above
    C. Third Degree as per definition
  16. If the percentage of inflammable gas is more than 0.1 percent then what will be the gassiness of the seam?
    A. First Degree as per definition
    B. Second Degree as per definition
    C. Third Degree as per definition
    D. None of the Above
    B. Second Degree as per definition
  17. If the rate of emission of inflammable gas per tonne of coal produced exceeds ten cubic meters then what will be the gassiness of the seam?
    A. First Degree
    B. Second Degree
    C. Third Degree
    D. None of the Above
    C. Third Degree
  18. If the rate of emission of inflammable gas per tonne of coal produced is equal to ten cubic meters per tonne of coal produced then what will be the gassiness of the seam?
    A. First Degree
    B. Second Degree
    C. Third Degree
    D. None of the Above
    B. Second Degree
  19. If the rate of emission of inflammable gas per tonne of coal produced is equal to twenty cubic meters per tonne of coal produced then what will be the gassiness of the seam?
    A. First Degree
    B. Second Degree
    C. Third Degree
    D. None of the Above
    C. Third Degree
  20. If the percentage of inflammable gas is more than 0.1 percent and rate of emission of inflammable gas per tonne of coal produced is five cubic meters per tonne of coal produced then what will be the gassiness of the seam?
    A. First Degree
    B. Second Degree
    C. Third Degree
    D. None of the Above
    B. Second Degree
  21. If the percentage of inflammable gas is less than 0.01 percent and rate of emission of inflammable gas per tonne of coal produced is five cubic meters then what will be the gassiness of the seam?
    A. First Degree
    B. Second Degree
    C. Third Degree
    D. None of the Above
    B. Second Degree
  22. If the percentage of inflammable gas is more than 0.2 percent then what will be the gassiness of the seam?
    A. First Degree
    B. Second Degree
    C. Third Degree
    D. None of the Above
    B. Second Degree
  23. If the percentage of inflammable gas is zero percent then what will be the gassiness of the seam?
    A. First Degree
    B. Second Degree
    C. Third Degree
    D. have to further check for rate of emission per tonne of coal produced data
    D. have to further check for rate of emission per tonne of coal produced data
  24. If the percentage of inflammable gas is less than 1 percent and the rate of emission of inflammable gas per tonne of coal produced is two cubic meters per tonne of coal produced then what will be the gassiness of the seam?
    A. First Degree
    B. Second Degree
    C. Third Degree
    D. None of the Above
    B. Second Degree
  25. If the percentage of inflammable gas is 0.1 percent then what will be the gassiness of the seam?
    A. First Degree
    B. Second Degree
    C. Third Degree
    D. Data insufficient and needs further rate of emission data
    D. Data insufficient and needs further rate of emission data
  26. If the %age of inflammable gas is more than 0.1, can we definitely say that it will be second degree seam.
    A. yes as per definition of 2nd Degree
    B. no;
    C. may be
    D. None of the Above
    A. yes as per definition of 2nd Degree
  27. If the Rate of emission of inflammable gas is more than 10 m3 per tonne of coal produced, can we say that it will be second degree seam?
    A. yes as per definition of 2nd Degree
    B. no, it will be 3rd degree
    C. may be
    D. None of the Above
    B. no, it will be 3rd degree
  28. If the Rate of emission of inflammable gas is equal to 6 m3 per tonne of coal produced, can we say that it will be second degree seam.
    A. yes as per definition of 2nd Degree
    B. no;
    C. may be
    D. None of the Above
    A. yes as per definition of 2nd Degree
  29. If the Rate of emission of inflammable gas is equal to 60 m3 per 10 tonne of coal produced, then what will be the gassiness of the coal seam?
    A. Second Degree
    B. Third Degree
    C. First Degree
    D. None of the Above
    A. Second Degree

  30. In UG mines, in one day 500 tonne coal is produced and when inflammable gas is measured then it was 1 % and further it was seen that rate of emission of inflammable gas was 1000 m3. What should be the degree of gassiness of the coal seam?
    A. Second Degree
    B. Third Degree
    C. First Degree
    D. None of the Above
    A. Second Degree,
    Hint: as the definition of 2nd degree, either of the two conditions should be fulfilled to qualify as 2nd degree :
    1. % of inflammable gas should be more than 0.1
    2. rate of emission should be more than 1 m3 but not more than 10 m3 i.e. 1< Rate of emission<= 10 m3.
    Means to say, if inflammable gas is more than 0.1 then it will be called 2nd degree and also if rate of emission is in between 1 to 10 m3 then it will be called 2nd degree.
    In the above question, it is written as….. inflammable gas is measured then it was 1 %…. and as per definition it will be 2nd degree no further need to go for rate of emission checking. But for convenience I have mentioned the rate of emission per tonne of coal = 1000 m3/ 500 te= 2 m3/ te of coal, which is also in the range of 1 to 10 m3.

  31. In which degree of seam, precautions will be more?
    A. Second Degree
    B. Third Degree
    C. First Degree
    D. None of the Above
    B. Third Degree,
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