Engine_2014 : Steam Plants - 986/1951
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| Tubes may be seal welded into fittings or headers of boilers and superheaters after they have been expanded and flared, provided the material in the fitting or header does not contain carbon in excess of __________ . |
| A) 0.35% |
| B) 0.40% |
| C) 0.45% |
| D) 0.50% |
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