- Drums with helical grooves
- Plain cylindrical drums
- Both are equally preferred
- None of the above
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) Which type of rope drum is preferred in shaft winding?
Solution:
They have more bearing surface of the drum and prevent friction between adjacent turns of the rope. It properly guides the rope on the drum.
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- CIM
- RIM / Inspector of mines
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