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DGMS COAL MMLGS JUNE-2025 MEMORY BASED QUESTIONS

DGMS COAL JUNE-2025 MEMORY BASED QUESTIONS ASKED IN MINE MANAGEMENT LEGISLATION & GENERAL SAFETY

1. What is the BIS code for safety helmets?
2. What are the conditions prescribed for working of women in mines?
3. At what temperature should drinking water be supplied in mines (as per wet bulb temperature)?
4. How are safety helmets classified based on protection class?
5. In a mine plan, which colour is used to represent the intake airway?
6. In underground mines, intake, exit, and escape routes are marked using which colour?
7. As per CMR 2017, what does Regulation 111 specify?
8. As per CMR 2017, what does Regulation 121 specify?
9. What is the minimum and maximum distance between two manholes on a haulage road?
10. What are the standard height and depth requirements of a manhole?
11. What is the standard lead length of detonators used in underground blasting operations?

12. For which category of projects is Environmental Impact Assessment (EIA) not required?
13. What is meant by the critical density of explosives and what disadvantage is associated with it?
14. What is the key difference between Ambient Air Quality Survey and Dust Survey in mines?
15. Which type of filtration method is used for removal of odour from water?
16. How are chemical impurities removed from water during treatment processes?
17. What are the major challenges faced during implementation of CSR and EIA activities in mining areas?
18. What are the key components included in a Mine Environment Management Plan?

19. Who introduced the concept of Management by Objectives (MBO)?
20. Who formulated the theory of Scientific Management?
21. Arrange the evolution of management theories in chronological order.
22. What is the leadership approach called Laissez Faire associated with?
23. What are the key principles of Behavioral Systems Theory in management?
24. What are the main objectives of Material Management?
25. What are the principles and applications of ABC analysis in inventory control?
26. What does VED stand for in inventory management?
27. What are the major challenges faced while implementing ERP systems in organizations?
28. Which of the following is not considered an advantage of ERP systems?
29. Explain the terms Contribution Margin and Contribution Margin Ratio.
30. How is Break-Even Point calculated using fixed cost and variable cost data?
31. Match the following theories or concepts with their respective management thinkers.
32. What are the various types of conflicts encountered in management, and how are they resolved?

33. For which age group of employees is the Periodic Medical Examination (PME) conducted every three years?
34. Which ratio represents the factor of safety in mining engineering?
35. If the factor of safety in granular soil is 2, what does it indicate about stability?
36. Why is the spoil bank height generally limited to 30 metres, with slope ratio 1:5?
37. Which of the following methods does not help in increasing slope stability?
38. What happens when the stemming height in a blast hole is more than the burden?
39. What are the major factors affecting slope stability in open cast mines?
40. What are the types of Mine Closure Plans, and what does each type include?
41. To whom should the annual returns of a mine be submitted?
42. What are the typical components of a mine’s haul road design?
43. What is the normal width requirement for a one-way haul road?
44. Under what conditions does the operator blow the horn while overtaking on haul roads?
45. Why is the gradient of 1 in 16 maintained on certain haul road sections?

46. What are the safe practices for conducting blasting operations near substations and other surface installations?
47. What is meant by critical density of an explosive, and what operational issue does it cause?
48. What is the relationship between stemming height and burden in efficient blasting?
49. What are the key parameters used for calculating powder factor in blasting operations?
50. What are the factors affecting the efficiency of blasting in coal and overburden?
51. What precautions must be taken during handling of detonators and fuses in underground mines?

52. What is the standard level of illumination required at an electrical substation?
53. Six 100-Watt bulbs are fixed at a distance of 6 m each — what parameter is to be calculated in this problem?
54. What are the standard requirements for illumination in opencast haul roads and workshops?
55. What is the role of earthing in electrical safety within mines?
56. What are the safety requirements for telephones installed in underground workings?

57. How does the velocity of air change when the cross-sectional area of an airway is reduced to half?
58. How do P-waves behave when they pass from one medium to another?
59. What is the relation between variance and correlation in statistical data analysis?
60. What is the colour convention for showing intake and return airways on ventilation plans?
61. What are the standard procedures for marking abandoned areas in underground mine plans?
62. What are the functions of boreholes in geological exploration of mines?

63. What is the difference between Progressive and Final Mine Closure Plans?
64. What is the primary objective of a lighting survey in a mine?
65. What are the various components of Critical Path Method (CPM)?
66. What are the main time components considered in PERT analysis?
67. How do CPM and PERT differ in terms of approach and application?
68. What are the essential steps involved in preparing a Project Report for a new mine?
69. What is the importance of caveability index, and how is it calculated?

71. What are the parameters affecting pillar load calculation in underground mines?
72. What does the term texture refer to in the context of geological formations?
73. What are the standard colour codes used for different features in mine plans?
74. What are the standard RPM ranges during dumper start, movement on gradient, and unloading?
75. What is meant by wet bulb temperature, and how does it relate to comfort conditions in mines?
76. What is the purpose of conducting a lighting survey by the mine manager?
77. What are the key parameters considered in noise level calculation in mines?
78. What are the functions of parapet walls or embankments along haul roads?