Recent Non-compliance Case: Electronic Detonators failed BIS norms (tested at CIMFR, Dhanbad).
Important BIS Standards: IS 18462:2023, IS 7632:1975, IS 6609 series.
Key DGMS Circulars/Notifications: 2014, 2020, and GSR 982–986 (2018).
Action Required: Establish checks & controls in magazines, compliance with standards before use.
· ✨ MCQs on Explosives Quality & Safety in Mines
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· ❓ Q1. · As per DGMS Circular No. 01 (06/04/2025), which regulation of Coal Mines Regulations, 2017 requires explosives to be of good quality and condition? A) Reg. 153 B) Reg. 179 C) Reg. 183 D) Reg. 192 E) Reg. 210 · ✅ Answer: C) Reg. 183 📘 Explanation: Reg. 183 of CMR, 2017 specifically mandates good quality and good condition of explosives.
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· ❓ Q2. · Which regulation of Metalliferous Mines Regulations, 1961 deals with the quality and condition of explosives? A) Reg. 121 B) Reg. 183 C) Reg. 153 D) Reg. 102 E) Reg. 199 · ✅ Answer: C) Reg. 153 📘 Explanation: Reg. 153 of MMR, 1961 states that explosives used must be of good quality & in good condition.
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· ❓ Q3. · Between 2019 and 2024, how many fatal accidents occurred in mines due to explosives? A) 15 B) 18 C) 21 D) 25 E) 27 · ✅ Answer: C) 21 📘 Explanation: DGMS analysis shows 21 fatal accidents due to explosives during this period.
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· ❓ Q4. · The 21 accidents (2019–2024) due to explosives caused how many fatalities? A) 36 B) 44 C) 51 D) 57 E) 62 · ✅ Answer: B) 44 📘 Explanation: These accidents led to 44 deaths and 12 serious injuries.
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· ❓ Q5. · Which of the following is NOT a major cause of explosives-related accidents mentioned in the circular? A) Misfires / sockets B) Accidental initiation C) Overcharging of detonators D) Projectiles from blasting E) Delayed ignition · ✅ Answer: C) Overcharging of detonators 📘 Explanation: The circular lists misfires, accidental initiation, projectiles, delayed ignition, and unsafe blasting as causes — overcharging is not directly mentioned.
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· ❓ Q6. · Electronic Detonators recently tested after an accident were found non-compliant at which institution? A) IIT-ISM, Dhanbad B) CSIR-CIMFR, Dhanbad C) NIRM, Bengaluru D) DGMS Testing Lab, Dhanbad E) ICMR, Hyderabad · ✅ Answer: B) CSIR-CIMFR, Dhanbad 📘 Explanation: CSIR-CIMFR (Central Institute of Mining & Fuel Research) tested detonators and found some batches not meeting BIS norms.
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· ❓ Q7. · Which BIS standard applies to Electronic Detonators? A) IS 7632:1975 B) IS 18462:2023 C) IS 6609 (Part II/Sec. 1):1973 D) IS 6609 (Part III):1973 E) IS 6609 (Part IV):1984 · ✅ Answer: B) IS 18462:2023 📘 Explanation: IS 18462:2023 covers Electronic Detonators (general & permitted type).
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· ❓ Q8. · Which BIS standard applies to Electric Detonators? A) IS 18462:2023 B) IS 7632:1975 (Affirmed 2021) C) IS 6609 (Part II/Sec. 2):1974 D) IS 6609 (Part III):1973 E) IS 6609 (Part IV):1984 · ✅ Answer: B) IS 7632:1975 (Affirmed 2021) 📘 Explanation: This standard covers Electric Detonators for both general & permitted type.
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· ❓ Q9. · Which standard deals with Permitted Explosives? A) IS 6609 (Part II/Sec. 2):1974 B) IS 6609 (Part II/Sec. 3):1980 C) IS 6609 (Part III):1973 D) IS 6609 (Part IV):1984 E) IS 6609 (Part II/Sec. 1):1973 · ✅ Answer: A) IS 6609 (Part II/Sec. 2):1974 📘 Explanation: This section of IS 6609 covers permitted explosives.
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· ❓ Q10. · Which BIS standard is related to Slurry Explosives? A) IS 6609 (Part II/Sec. 1):1973 B) IS 6609 (Part II/Sec. 2):1974 C) IS 6609 (Part II/Sec. 3):1980 D) IS 6609 (Part IV):1984 E) IS 7632:1975 · ✅ Answer: C) IS 6609 (Part II/Sec. 3):1980 📘 Explanation: It specifies standards for slurry explosives.
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· ❓ Q11. · Which BIS standard deals with Detonating Fuses? A) IS 6609 (Part II/Sec. 1):1973 B) IS 6609 (Part III):1973 C) IS 6609 (Part IV):1984 D) IS 7632:1975 E) IS 18462:2023 · ✅ Answer: C) IS 6609 (Part IV):1984 📘 Explanation: This part of IS 6609 specifies detonating fuses.
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· ❓ Q12. · DGMS Circular No. 06, dated 17/11/2014, relates to: A) Transport of explosives in bulk B) Test standards & passing criteria of permitted explosives/detonators C) Conditions for blasting in fire areas D) Use of Ammonium Nitrate Fuel Oil E) Precautions in deep hole blasting · ✅ Answer: B) Test standards & passing criteria of permitted explosives/detonators 📘 Explanation: It prescribes test standards for underground mines.
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· ❓ Q13. · Which DGMS Circular provides precautions against premature blasts of SME/SMS explosives? A) Circular No. 06 (2014) B) Circular No. 12 (2018) C) Circular No. 14 (2020) D) Circular No. 07 (2022) E) Circular No. 09 (2023) · ✅ Answer: C) Circular No. 14 (24/12/2020) 📘 Explanation: It deals with premature blasting of SME/SMS.
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· ❓ Q14. · Which notification deals with Transport of Explosives in Bulk? A) GSR 982(E) – 01/10/2018 B) GSR 984(E) – 01/10/2018 C) GSR 985(E) – 01/10/2018 D) GSR 986(E) – 01/10/2018 E) GSR 981(E) – 01/10/2018 · ✅ Answer: A) GSR 982(E) 📘 Explanation: This notification specifies conditions for bulk transport of explosives.
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· ❓ Q15. · Which notification specifies conditions for use of ANFO (Ammonium Nitrate Fuel Oil)? A) GSR 982(E) B) GSR 984(E) C) GSR 985(E) D) GSR 986(E) E) GSR 983(E) · ✅ Answer: B) GSR 984(E) 📘 Explanation: It deals with ANFO conditions.
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· ❓ Q16. · Which notification lays down conditions for Deep-Hole Blasting in Opencast Coal Mines? A) GSR 982(E) B) GSR 984(E) C) GSR 985(E) D) GSR 986(E) E) GSR 987(E) · ✅ Answer: C) GSR 985(E) 📘 Explanation: This specifically relates to deep-hole blasting.
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· ❓ Q17. · Which notification deals with Blasting in Fire Areas of Opencast Coal Mines? A) GSR 982(E) B) GSR 984(E) C) GSR 985(E) D) GSR 986(E) E) GSR 987(E) · ✅ Answer: D) GSR 986(E) 📘 Explanation: It provides conditions for blasting in fire-prone areas.
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· ❓ Q18. · What is the primary hazard of using explosives not in good condition? A) Reduced production B) Avoidable accidents C) Delay in blasting schedule D) Overconsumption of detonators E) Environmental pollution · ✅ Answer: B) Avoidable accidents 📘 Explanation: Poor condition explosives increase chances of misfire, initiation, accidents.
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· ❓ Q19. · Which body issues BIS Standards related to explosives? A) DGMS B) MoEF&CC C) CSIR D) Bureau of Indian Standards E) Ministry of Defence · ✅ Answer: D) Bureau of Indian Standards 📘 Explanation: BIS sets standards (IS codes) for explosives & detonators.
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· ❓ Q20. · Who is responsible to ensure compliance with standards before use in mines? A) Explosive Manufacturer B) DGMS Inspectors C) Mine Owner/Agent/Manager D) CIMFR E) Local Police · ✅ Answer: C) Mine Owner/Agent/Manager 📘 Explanation: They must establish proper mechanism for checks & compliance.
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· ❓ Q21. · Who is primarily responsible for complying with BIS standards during manufacturing? A) Mine Owner B) DGMS C) Manufacturer of explosives & detonators D) CIMFR E) Ministry of Labour · ✅ Answer: C) Manufacturer of explosives & detonators 📘 Explanation: They must ensure products meet BIS norms before supply.
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· ❓ Q22. · Which of the following pairs is incorrect? A) IS 18462:2023 – Electronic Detonators B) IS 7632:1975 – Electric Detonators C) IS 6609 (Part II/Sec. 3):1980 – Slurry Explosives D) IS 6609 (Part III):1973 – Detonating Fuses E) IS 6609 (Part IV):1984 – Detonating Fuses · ✅ Answer: D) IS 6609 (Part III):1973 – Detonating Fuses 📘 Explanation: Part III covers Detonators (general & permitted), not fuses.
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· ❓ Q23. · What is the role of test houses like CIMFR? A) To issue mining leases B) To test quality of explosives & detonators C) To monitor mine ventilation D) To design blasting patterns E) To regulate explosive imports · ✅ Answer: B) To test quality of explosives & detonators 📘 Explanation: They ensure BIS compliance by testing samples.
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· ❓ Q24. · The circular emphasizes developing and implementing which of the following in mine magazines? A) New blasting techniques B) Automated charging machines C) Suitable mechanisms (checks & controls) D) Drone surveillance E) Fire extinguishing systems · ✅ Answer: C) Suitable mechanisms (checks & controls) 📘 Explanation: These ensure compliance with statutory requirements.
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· ❓ Q25. · Main objective of Circular No. 01 (2025) is to: A) Increase production efficiency B) Reduce noise pollution during blasting C) Ensure explosives are of good quality & prevent accidents D) Reduce cost of explosives in mines E) Promote use of SME over ANFO · ✅ Answer: C) Ensure explosives are of good quality & prevent accidents 📘 Explanation: The circular focuses on quality, condition, and compliance to avoid loss of life & property.
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