- Three
- None of the options
- One
- Two
- no requirement
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) In a below ground mine, 50 persons are ordinarily employed in belowground and a rescue station is available at 20 km from the mine. How many rescue rooms are required to be provided by Owner?
Solution:
no requirement
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