GATE Mining Methods and Machinery: Mining Machinery – Previous Year Questions
33 GATE previous year questions on Mining Machinery (Mining Methods and Machinery, Mining Engineering) with answers and explanations, from every paper.
- GATE 2021 MN Q11 – A tricone roller bit is used with which drilling system?
- GATE 2021 MN Q13 – Which surface-mining equipment is used for both drop cut and terrace cut?
- GATE 2021 MN Q14 – Which component does a surface miner NOT have?
- GATE 2021 MN Q21 – How should a hydraulic sand-stowing pipeline be laid relative to its hydraulic gradient line?
- GATE 2021 MN Q36 – Six 10-tonne shuttle cars each carry 80% capacity and make 7 round trips/hour. They feed coal of bulk density 1.2 t/m³ to a belt with effective…
- GATE 2021 MN Q37 – Match labelled point-attack cutting-tool angles P α, Q β, R δ, S γ with 1 cutting angle, 2 clearance angle, 3 wedge angle, 4 rake angle.
- GATE 2021 MN Q39 – A 250-tonne truck moves uphill at 5° with constant tractive force 800 kN and rolling resistance 545 kN. Take g=10 m/s². How many seconds are required…
- GATE 2021 MN Q53 – A single 7-tonne-payload skip hoists from 620 m. Acceleration/deceleration are 1 m/s² and full speed 10 m/s. Loading takes 120 s and unloading 60 s;…
- GATE 2021 MN Q55 – A single-acting reciprocating ram pump runs at 120 rpm and delivers 10 L/s. Ram diameter is 150 mm and stroke 300 mm. Find volumetric efficiency in…
- GATE 2022 MN Q23 – Match machines P continuous miner, Q jackhammer, R AFC and S shield support with components I flight bar, II lemniscate link, III loading apron and IV…
- GATE 2022 MN Q27 – Choose the haul-road pavement layers from top to bottom.
- GATE 2022 MN Q34 – A friction-winder skip accelerates from rest to its steady speed in 15 s. Use the given torque-time diagram to find deceleration time in seconds, to…
- GATE 2022 MN Q51 – A battery locomotive pulls mine tubs of total mass 3 tonnes up a 1-in-20 gradient. Rolling-friction coefficient is 0.06 and adhesion coefficient 0.2.…
- GATE 2022 MN Q52 – A pump lifts water of density 1020 kg/m³ at 250 m³/hour from 150 m depth. Pipe-friction and shock head loss total 15 m. Overall efficiency is 68%.…
- GATE 2022 MN Q53 – A dumper spends 3 min at loading and 1 min unloading. Stations are 4.5 km apart; loaded speed is 12 km/hour and empty speed 18 km/hour. Find the…
- GATE 2022 MN Q55 – A shearer cuts a 3 m seam with 0.7 m web at 12 m/min. AFC trough area is 0.4 m² with average loading coefficient 0.7. Find conveyor speed needed…
- GATE 2023 MN Q56 – A thermal station burns 7000 tonnes/day of coal of calorific value 4000 kcal/kg. Thermal efficiency is 40%, electrical efficiency 85%, and 860 kcal…
- GATE 2023 MN Q65 – A water turbine pump has backward-curved impellers of diameter 35 cm running at 1200 rpm. Blade angle is 30°, radial discharge speed 2 m/s and…
- GATE 2024 MN Q28 – The crusher’s 24-hour activity timeline is shown. Find utilisation in percent to two decimals, using available hours as the denominator.
- GATE 2024 MN Q32 – A circular track has radius 300 m and maximum elevation difference 0.1 m across 1.6 m width. Neglecting side friction, find balancing vehicle speed in…
- GATE 2024 MN Q51 – A pump raises 320 m³/hour through 180 m head at overall efficiency 0.70. Mine-water unit weight is 10.20 kN/m³. It works 14 h/day for 270 days and 20…
- GATE 2024 MN Q62 – A 35 kW motor drives a 600 mm pulley at 400 rpm. Belt tensions satisfy Ttight=2.5Tslack. Maximum tension is 8 N per mm belt width. Find minimum belt…
- GATE 2024 MN Q63 – Replace a winding rope in the shown 1.2 m drum/sheave system. Shaft depth 215 m, headgear 32 m, slope span 45.5 m and sheave contact 120°. Allow 1 m…
- GATE 2024 MN Q65 – Twelve detonators are in series. Each has resistance 1.48 Ω and 1.5 m lead wire of 0.04 Ω/m. The blasting cable is 120 m long and each conductor has…
- GATE 2025 MN Q15 – Which rope-haulage safety device arrests forward runaway tubs?
- GATE 2025 MN Q26 – A shovel takes3 min to load each of8 dumpers. Each dumper’s travel-plus-loading cycle is22 min. Find waiting time per dumper in min, as an integer.
- GATE 2025 MN Q43 – A column supplies400 mL/s through an outlet of area10⁻⁴ m². With g=10 m/s² and negligible friction/losses, find the driving head H in cm to two…
- GATE 2025 MN Q48 – Direct-rope haulage produces24 tonnes/hour over610 m at gradient1 in12. Cars carry1 tonne payload and have0.5 tonne tare. Rope speed is1.694 m/s and…
- GATE 2025 MN Q50 – A2.5-tonne locomotive hauls five3-tonne gross cars up a1-in20 slope. The printed tractive force is1800 kN and acceleration0.5 m/s². With g=10…
- GATE 2026 MN Q35 – The belt has tight-side tension5.0 kN and slack-side tension2.5 kN as shown. Friction coefficient is0.3. At limiting no-slip equilibrium, find wrap…
- GATE 2026 MN Q55 – Wagons8 m long,3 m wide and3 m high move at0.4 km/h under a silo, with1 m gaps. Filling stops between wagons. At fill factor0.95 and coal density1.2…
- GATE 2026 MN Q56 – A turbine pump generates60 m water head at2000 rpm with manometric efficiency70%. Neglect impeller-blade curvature. Find impeller diameter in cm to…
- GATE 2026 MN Q60 – A DERD shearer cuts a2.4 m seam at0.6 km/h with web depth0.5 m. Coal occupies0.24 m² of AFC cross-section. With10% spillage, find minimum AFC speed in…