Comprehensive FMC Mining & Working Exam Guide: Questions, Answers, and Explanations
FMC - Winning & Working (MCQs)1. In India, a coal seam is termed as "Thick Seam" when its thickness is equal to or more than:
(1) 2.8 m
(2) 3 m
(3) 3.6 m
(4) 4.5 m
(5) 4.8 m ✅
2. If a shaft is more than ___________ m in depth, arrangements shall be by mechanical means for persons to descend and ascend:
(1) 20 m
(2) 25 m
(3) 30 m ✅
(4) 40 m
(5) 50 m
3. RMR is predominantly used for estimation of rock load and design of the support system for:
(1) Goaf edges
(2) Development roadways in coal seam ✅
(3) Depillaring district
(4) Shaft sinking
(5) Splits & slices
4. The most suitable method for high production and high productivity mechanized mining of flat to gently dipping, 1.5 to 4.5 m thick coal seams is:
(1) Bord & Pillar Mining
(2) Blasting Gallery Method
(3) Room & Pillar Mining
(4) Knife Edge Method
(5) Longwall Mining ✅
5. Friction prop is a _______________ type of support:
(1) Rigid
(2) Yielding ✅
(3) Tangential
(4) Diagonal
(5) Flat
6. The type of permitted explosive used for off-the-solid blasting in coal mines is:
(1) P1
(2) P2
(3) P3
(4) P4
(5) P5 ✅
7. At _______________ width-depth ratio of goaf in underground, it causes maximum possible subsidence at more than one point in the overlying ground surface:
(1) Marginal
(2) Sub-critical
(3) Critical
(4) Super-critical ✅
(5) Nominal
8. The subsidence that continues to occur after the completion of depillaring is known as:
(1) Critical subsidence
(2) Nominal subsidence
(3) Sub-critical subsidence
(4) Residual subsidence ✅
(5) Critical subsidence
9. Proneness to spontaneous heating is high in the following crossing point temperature range:
(1) 120° to 140° ✅
(2) 140° to 155°
(3) > 155°
(4) 100° to 120°
(5) < 100°
10. Which of the following term is NOT used to describe a geological fault?
(1) Gradient ✅
(2) Throw
(3) Hade
(4) Upthrow
(5) Downthrow
11. In the context of surface mine development, a box cut is defined as:
(1) The initial cut made to open a mine ✅
(2) The final cut to close the mine
(3) Any cut which must look like an open box
(4) The cut to extend haul road
(5) None of the Options
12. Ascensional ventilation is preferred to descensional ventilation mainly because:
(1) Equivalent resistance of mine is reduced
(2) Chance of methane layer formation is less
(3) Large NVP is developed adding fan pressure ✅
(4) Cooling power of air is increased
(5) Increases humidity
13. In case of a weak rock overlain by strong rock, the rock bolt installed through them will act in:
(1) Suspension ✅
(2) Beam building
(3) Keying
(4) Consolidation
(5) None of the Options
14. Burden for 57 mm hole in blasting gallery method is:
(1) 1.5 m ✅
(2) 2.5 m
(3) 3.5 m
(4) 4.5 m
(5) 5.5 m
15. Choose the correct statement:
(1) Areas having frequent geological disturbances are not suitable for Mechanized bord and pillar mining ✅
(2) Blasting Gallery method is suitable ideally for gassy seams of degree III
(3) Mechanized board and pillar mining is not suitable for seams having inclination less than 15°
(4) Mechanized longwall mining is not suitable for seams having inclination less than 15°
(5) Areas having frequent geological disturbances are suitable for mechanized bord and pillar mining
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