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Preheating is essential in welding
Answer & Solution
Correct Answer:
Option
A
Preheating minimizes the temperature difference between the welding arc and the base material. .
Slowing the cooling rate also allows hydrogen to escape the weld puddle as it hardens to help minimize cracking.
preheating introduces the necessary heat into the weld area to ensure proper penetration.
Slowing the cooling rate also allows hydrogen to escape the weld puddle as it hardens to help minimize cracking.
preheating introduces the necessary heat into the weld area to ensure proper penetration.
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