GATE Surface Environment, Mine Ventilation and Underground Hazards: Underground Hazards – Previous Year Questions
16 GATE previous year questions on Underground Hazards (Surface Environment, Mine Ventilation and Underground Hazards, Mining Engineering) with answers and explanations, from every paper.
- GATE 2021 MN Q17 – Why is NONEL used as a down-the-hole initiator in the context of this question?
- GATE 2022 MN Q24 – Which is NOT a notifiable disease under the Indian mining legislation referred to by this 2022 paper?
- GATE 2022 MN Q57 – The Coward diagram shows sealed-area gas composition A(CH₄7%, O₂17%). Sealed volume is 10000 m³. Find the minimum inert gas volume, at the same…
- GATE 2022 MN Q58 – An 8×6×4 m workshop has one roof-corner luminaire at each corner. Each uses 100 W and produces 100 lumen/W uniformly into a full sphere. Neglect…
- GATE 2023 MN Q18 – During 2020 an underground coal mine recorded 5 serious, 15 reportable and 25 minor injuries. Average employment was 1200. Find the total injury rate…
- GATE 2023 MN Q23 – Under the DGMS Safety Management Plan risk-ranking method referred to in the paper, how is a hazard risk score computed?
- GATE 2024 MN Q11 – Exposure to loud impulsive noise may lead to
- GATE 2024 MN Q12 – In a self-contained closed-circuit breathing apparatus,
- GATE 2024 MN Q14 – A mine records 2 fatalities and 3 serious injuries in a year with 1100 average daily employees and 300 working days. Find the DGMS severity index used…
- GATE 2024 MN Q15 – Under CMR 2017, a geared winding engine has its manwinding cage at the normal shaft-top position. What minimum space in metres is required from the…
- GATE 2024 MN Q49 – Mine-air analysis gives O₂17.15%, CO₂3.40%, CH₄2.20%, N₂77.25%. Atmospheric air has O₂20.95%, CO₂0.03%, N₂79.02%. Find blackdamp percentage, to two…
- GATE 2025 MN Q23 – Which pair is used in a traditional chemical-foam fire extinguisher?
- GATE 2025 MN Q25 – According to the Coal Mines Regulations2017 provision quoted in this examination, haulage ropes must be recapped at least once every
- GATE 2026 MN Q27 – Which condition is associated in this mining-health question with a cobweb-like appearance on a miner’s lung radiograph?
- GATE 2026 MN Q28 – Air is79% nitrogen and21% oxygen by volume. Find methane’s volume percentage in a stoichiometric methane–air mixture.
- GATE 2026 MN Q45 – A closed-circuit breathing apparatus has2 L of oxygen at200 bar. Consumption is2 L/min at ambient pressure. Under the ideal capacity approximation,…