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T7D09:What is the characteristic appearance of a cold tin-lead solder joint?

T7D09T7D

What is the characteristic appearance of a cold tin-lead solder joint?

Direct answer summary (2026-2030 NCVEC pool)

The official correct answer for T7D09 is A rough or lumpy surface.

The key fact is A rough or lumpy surface. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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