- Every day
- Once at least in every 7 days
- Once at least in every 15 days
- Once at least in every 30 days
- None of these
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) Effectiveness of the switch gear & protective system for automatic disconnection of electric supply to the mine, in case of a fault, shall be checked & recorded?
Solution:
Effectiveness of the switch gear & protective system for automatic disconnection of electric supply to the mine, in case of a fault, shall be checked & recorded Once at least in every 30 days.
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