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M

Mr. Dubey • 100.64K Points
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Q. Mercury vapour black lights may be extinguished if the supply voltage drops below about:

  • (A) 120 volts
  • (B) 90 volts
  • (C) 220 volts
  • (D) 200 volts
  • Correct Answer - Option(D)
  • Views: 437
  • Filed under category Non Destructive Testing and Evaluation
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