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Mr. Dubey • 100.64K Points
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Q. Which of the following is the most effective method for the detection of extremely deep-lying defects:

  • (A) Dry residual method using DC surge
  • (B) Wet continuous method using half wave rectified current
  • (C) Wet residual method
  • (D) Dry continuous method using half wave rectified current with prods
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