In certain circumstances, weldments are...

In certain circumstances, weldments are...

Question 1 of 270705eccef9bbacbc34ba4d45334

In certain circumstances, weldments are preheated before each pass to __________.

Question 1 of 27070

Q

In certain circumstances, weldments are preheated before each pass to __________.

🔍 Key Concepts

• preheating in welding and how it affects metal expansion and contraction • the relationship between temperature changes and residual (internal) stresses in a weld • whether preheating can truly replace later heat treatment steps

💭 Think About

• Think about what happens to the base metal and weld metal as they heat up and then cool down. Which choice best matches the control of that process? • Ask yourself: does preheating make temperature differences between the weld and surrounding metal larger or smaller? How would that impact stress? • Consider whether preheating is usually an optional convenience, or part of controlling weld quality to avoid cracking and distortion.

✅ Before You Answer

• Which option is most directly connected to controlling cracking, distortion, and residual stress in welded structures? • Is there any choice that claims preheating can replace another required process entirely? Be cautious of that. • Check which answer reflects a realistic and common purpose of preheating rather than a side effect or unlikely practice.