- 250 volts
- 125 volts
- 30 volts
- 650 volts
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) On the surface of the mine/in an O/C mine the voltage may be raised to_________?
Solution:
On the surface of the mine/in an O/C mine the voltage may be raised to 250 volts.
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