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| Q. |
What is the danger associated with using a wire brush during pre-cleaning? |
| A. | Bristles from the wire brush may cause false indications |
| B. | Contaminants from the wire brush may cause delayed hydrogen cracking of high carbon steels |
| C. | The wire brush may not adequately remove organic soils |
| D. | The wire brush may close or smear metal over |
| Answer» D. The wire brush may close or smear metal over | |
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