Expansion Contraction Worksheet by 1s84ji5

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									                        Expansion Contraction Worksheet


1.   Define Expansion: What does it mean to expand?
2.   Define Contraction: What does it mean to contract?
3.   What happens to metal as you heat it?
4.   What happens to metal as it cools?
5.   Why does metal expand and contract during the welding process?
6.   How do we control distortion?
7.   What does it mean to control the heat input?
8.   What is a jig?


Drawings:

Draw an example of:

Distortion
Work pulled out of line
Work drawn into a carve
Vertical work pulled of center
Poor spacing

								
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