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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 |
Answer» D. Dry continuous method using half wave rectified current with prods |
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