DGMS Metal First Class Legislation – Memory-Based Questions (June 2025) Candidates who appeared for the DGMS First Class Manager (Metal) Legislation Exam (June 2025) shared memory-based questions. Based on those inputs, we have framed 25 important MCQs with answers and solutions. These cover Mines Act, Safety Standards, Environment, Blasting, ERP, and Geotechnical aspects that were highlighted in the actual exam.
Q1. Safety helmets for mine workers in India must comply with which BIS standard?
A) IS 3833
B) IS 4770
C) IS 2925
D) IS 6509
E) IS 4567
Answer: C – IS 2925 Solution: IS 2925 specifies performance requirements for industrial safety helmets used in mining and construction.
Q2. Under which condition can women be employed in mines?
A) Underground at night shifts
B) Above ground in day shifts as notified
C) Underground with prior DGMS permission for rescue
D) In any mine without restriction
E) None of the above
Answer: B – Above ground in day shifts as notified Solution: Mines Act prohibits underground work for women except emergencies, and allows only notified day hours above ground.
Q3. For which type of projects is Environmental Impact Assessment (EIA) not required?
A) Category A projects
B) Category B1 projects
C) Category B2 projects (small mining leases below threshold)
D) All mining projects require EIA
E) Projects in forest areas
Answer: C – Category B2 projects Solution: Category B2 projects (small scale) are exempt from detailed EIA under MoEFCC notification.
Q4. Critical density of an explosive refers to:
A) Density for storage safety
B) Minimum density required for detonation to propagate
C) Density giving maximum fragmentation
D) Density at which explosive becomes unstable
E) Density required for waterproofing
Answer: B – Minimum density required for detonation Solution: Below critical density, detonation cannot sustain → misfires.
Q5. What is the major disadvantage of operating explosives near critical density?
A) Increased flyrock
B) Reduced VOD, incomplete detonation
C) Overcharging
D) Excess fumes only
E) Higher cost
Answer: B – Reduced VOD, incomplete detonation Solution: Near critical density, detonation velocity decreases, leading to misfires and toxic fumes.
Q6. Sludge treatment completely eliminates all hazards. True or False?
A) True
B) False
C) True in large mines
D) True if incinerated
E) None
Answer: B – False Solution: Sludge treatment reduces hazards but does not eliminate them entirely; disposal precautions are still required.
Q7. Which ratio correctly represents the Factor of Safety (FoS)?
A) Stress ÷ Strength
B) Strength ÷ Stress
C) Load ÷ Resistance
D) Resistance ÷ Stress
E) In-situ stress ÷ Strength
Answer: B – Strength ÷ Stress Solution: FoS = strength of material ÷ applied stress. Values >1 ensure safety.
Q8. For which age group is Periodic Medical Examination (PME) conducted every 3 years?
A) <30 years
B) 30–50 years
C) >50 years
D) All workers
E) Only new entrants
Answer: B – 30–50 years Solution: PME cycle = every 5 years (<30), every 3 years (30–50), annually (>50).
Q9. Which is a key challenge in implementing ERP in mining enterprises?
A) Easy data migration
B) Smooth legacy system integration
C) Resistance to change and training issues
D) High user satisfaction immediately
E) Quick payback within 1 month
Answer: C – Resistance to change and training issues Solution: ERP challenges include migration issues, resistance to change, and training costs.
Q10. Which of the following is NOT an advantage of ERP?
A) Enhanced reporting
B) Increased operational silos
C) Increased data accuracy
D) Integrated decision-making
E) Standardized processes
Answer: B – Increased operational silos Solution: ERP reduces silos by integrating data across departments.
Q11. Which of the following does NOT improve slope stability?
A) Grass layering
B) Retaining wall
C) Anchored slope
D) Buttresses
E) Gabions
Answer: A – Grass layering Solution: Grass prevents erosion but does not structurally stabilize slopes.
Q12. Which statistical measure represents spread of data in mine sampling?
A) Correlation
B) Variance
C) Mean
D) Mode
E) Median
Answer: B – Variance Solution: Variance shows dispersion of data; correlation shows relationships.
Q13. Correlation coefficient values range between:
A) –5 to +5
B) –1 to +1
C) 0 to 1 only
D) –100 to +100
E) None
Answer: B – –1 to +1 Solution: r = +1 (perfect positive), –1 (perfect negative), 0 (no relation).
Q14. Blasting near an electrical substation in a mine area requires:
A) No precautions
B) Permission from DGMS, vibration monitoring, controlled blasting
C) Substation shutdown only
D) Doubling charge per hole
E) Using ANFO only
Answer: B – Permission + monitoring + controlled blasting Solution: DGMS requires PPV monitoring, reduced charge per delay, safety clearance.
Q15. Which filtration method is most effective to remove odour from water?
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