🌬️ Mine Ventilation MCQ Questions - Part 04
46. Ventilation “leakage” in mines means:
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Answer: B. Air short-circuiting through stoppings/doors
47. High leakage reduces:
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Answer: C. Both A and B
48. Which construction is mainly used to reduce leakage in galleries?
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Answer: B. Stoppings
49. Temporary stoppings are generally made of:
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Answer: C. Brattice cloth or wooden boards
50. Permanent stoppings should be constructed from:
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Answer: A. Masonry / Brick wall / RCC
51. In fiery seams, stoppings should be:
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Answer: A. Air tight / explosion proof
52. Air doors are provided generally to:
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Answer: B. Maintain ventilation circuit continuity
53. Regulators in ventilation are used to:
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Answer: A. Vary resistance of an airway
54. Splits of air in mines are balanced by:
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Answer: B. Regulators
55. An air cross-over in mine ventilation is:
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Answer: A. Horizontal passage to separate intake & return
56. Booster fans are placed in:
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Answer: A. Airways underground to improve circulation
57. Auxiliary fans are generally used with:
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Answer: B. Brattice cloth ducts
58. Leakage percentage in a mine is calculated by:
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Answer: A. (Q intake – Q return)/Q intake × 100
59. A good ventilation system should control:
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Answer: D. All of the above
60. DGMS requires auxiliary ventilation ducts to be extended:
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Answer: B. Within 6 m of face
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