What Is the Major Purpose of Pre- and Post-Heating Cast

question 20

Multiple Choice

What is the major purpose of pre- and post-heating cast iron for welding?

• A) To allow the weld to fuse deeper into the joint
• B) To control the rate of temperature change
• C) To reduce the carbon content in the casting around the weld, which makes it less brittle
• D) It helps the weld metal flow more evenly into the crack

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Definitions:

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