MCQOPTIONS
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| 1. |
Which of the following test frequencies would generally provide the best penetration in a 12 inch thick specimen of coarse-grained steel? |
| A. | 1.0 MHz |
| B. | 2.25 MHz |
| C. | 5.0 MHz |
| D. | 10 MHz |
| Answer» B. 2.25 MHz | |