Blasting & Explosives MCQ Questions - Part 05 | Indian Minerology

💥 Blasting & Explosives MCQ Questions - Part 05 (Final)

61. DGMS approval for permitted explosives is given after:

• A. Gallery test
• B. Field trial
• C. Laboratory analysis
• D. All of the above

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Answer: D. All of the above

62. Shotfirer renewal certificate is valid for:

• A. 1 year
• B. 2 years
• C. 3 years
• D. 5 years

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Answer: C. 3 years

63. Explosive audit in mines is carried out to:

• A. Verify stocks
• B. Ensure compliance with safety rules
• C. Avoid pilferage/theft
• D. All of the above

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Answer: D. All of the above

64. Rescue teams in explosive accident must first:

• A. Save equipment
• B. Ensure site safety and possible gas detection
• C. Rush inside immediately
• D. Collect logbook

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Answer: B. Ensure site safety and possible gas detection

65. The principal document for recording explosives usage on site is:

• A. Blasting log book
• B. Store register
• C. Magazine register
• D. Explosives Act register

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Answer: A. Blasting log book

66. Recent trends in blasting safety include:

• A. Electronic detonators
• B. Remote firing systems
• C. Blast monitoring with drones
• D. All of the above

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Answer: D. All of the above

67. Handling of used explosives cartridges is:

• A. Safe with bare hands
• B. Banned, must be disposed properly
• C. Used for stemming
• D. Can be reused next day

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Answer: B. Banned, must be disposed properly

68. “Hot hole” in blasting denotes:

• A. Hole with high water inflow
• B. Hole with excessive temperature (risk of premature initiation)
• C. Too deep hole
• D. Hole with less stemming

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Answer: B. Hole with excessive temperature (risk of premature initiation)

69. Before firing shots, the area must be cleared for:

• A. 30 m radius
• B. 50 m radius
• C. 100 m radius
• D. As per site-specific DGMS rules

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Answer: D. As per site-specific DGMS rules

70. The minimum age for blasting personnel as per Mines Act is:

• A. 16 years
• B. 18 years
• C. 21 years
• D. 25 years

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Answer: B. 18 years

71. Post-blast site inspection requires checking:

• A. For residual explosives/misfires
• B. Stability of the excavation
• C. Safe entry of personnel
• D. All of the above

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Answer: D. All of the above

72. DGMS Inspection is mandatory after:

• A. Major blasting accident
• B. Quarterly
• C. When explosives stock changes
• D. Every misfire

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Answer: A. Major blasting accident

73. The best practice for night blasting is:

• A. Not recommended, DGMS restrictions apply
• B. Allowed freely
• C. Only with manager permission
• D. Only with written DGMS approval

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Answer: D. Only with written DGMS approval

74. Training for blasting and explosives personnel must include:

• A. Fire fighting
• B. First aid
• C. Periodic safety refreshers
• D. All of the above

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Answer: D. All of the above

75. The ultimate goal of blasting safety is:

• A. Production maximization
• B. Minimize cost
• C. Ensure zero harm to workers, environment and equipment
• D. Achieve higher vibration

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Answer: C. Ensure zero harm to workers, environment and equipment

💥 Blasting & Explosives MCQ Series (Complete)

You have completed all 75 Blasting & Explosives MCQs in 5 parts.

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