- Excessive crushing of the rock
- Excessive vibration level
- Blown out shot
- Reduction in fly rocks
(c) Blown out shot
- Bench height
- Nature of strata to be broken
- Length of burden
- Length of NONEL
(d) Length of NONEL
- Shelter
- Magazine
- Store
- First aid roopm
(b) Magazine
- Free face to the holes blasted at first delay
- For better alignment by providing the center line
- For gas pressure release
- None of the above
(a) Free face to the holes blasted at first delay
- TNT
- Gun powder
- ANFO
- Pentolite
(b) Gun powder
- Wave pressure and Poisson’s ratio
- Wave pressure and density of the medium
- Propagation velocity and Poisson’s ratio
- Propagation velocity and density of the medium
(D) Propagation velocity and density of the medium
- They have less strength
- They have low velocity of detonation
- They do not produce much noise during blasting
- They conten sheathing agent
(d) They conten sheathing agent
- Critical diameter
- Optimal diameter
- Rapid burning but not an explosion
- Change in the inclination of drill hole
(a) Critical diameter
- Rapid explosion
- Burning and explosion
- Rapid burning but not an explosion
- Change in the inclination of drill hole
(c) Rapid burning but not an explosion
All Categories
- Central Electricity Authority Regulations (40)
- Drilling and Blasting (48)
- GATE 2024 (10)
- General (5)
- Geology (7)
- Mines Act 1952 (50)
- Mines Creche Rules (50)
- Mining Machinery (50)
- MINING MCQs (10)
- MMR 1961 (7)
- National Conference (7)
- Rock Mechanics (1)
- Surveying (1)
- THE MINES RESCUE RULES, 1985 (60)
- Winning and Working (23)