Question

too slow of a travel speed can lead to what discontinuities?

□ excessive reinforcement

□ cold lap

□ undercut

□ irregular weld profile

Explanation:

When the travel speed is too slow in welding (a part of Engineering sub - field in Natural Science), the heat input is excessive. This excessive heat can cause the base metal to be melted away at the toe of the weld, creating an undercut. Excessive reinforcement is more related to high electrode feed rate or low travel speed but in a different context (more about deposition). Cold lap is due to poor fusion between weld passes. Irregular weld profile can be due to various factors like inconsistent electrode movement etc., but undercut is a more direct consequence of slow travel speed causing excessive melting of the base metal at the weld toe.

Answer:

undercut