- Drums with helical grooves
- Plain cylindrical drums
- Both are equally preferred
- None of the above
- Lang’s lay is used as lifting or hoisting cable
- Lang’s lay is used in hauling operation in UG mines
- In regular lay, the wires & strands are laid in opposite to each other
- All of these
- Diameter of the wire rope in mm
- Number of strands in the wire rope
- Number of wires
- None of the above
- Fatigue failure
- Abrasive failure
- Both (a) & (b)
- None of the above
- Crushing
- Chipping
- Both (a) and (b)
- Either (a) or (b)
- Rotary drilling
- Percussive drilling
- Rotary Percussive drilling
- None of the above
- Stopper drill
- Jack-Hammer drill
- Crawler Mounted Drill
- Skid Mounted Drill
- hydraulic force
- pneumatic force
- electric drive
- electromagnetic drive
- Ripper
- Auger
- tool carrier
- rock hammer
- Tricone rock roller bit
- Diamond drill bit
- Steam hammer
- Rotary drill bits
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