MCQOPTIONS
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| 1. |
According to ASTM E709-95 when applying fluorescent magnetic particles technique, the operator shall be in darkness area at least......................prior to examination: |
| A. | 2 min |
| B. | 3 min |
| C. | 4 min |
| D. | 5 min |
| Answer» C. 4 min | |