Which of the following statements is correct...

🔍 Key Concepts

• Welding distortion and contraction – how metal shrinks as it cools and how that affects sequence. • Restraint vs. freedom to move – whether you want the joint to be able to move slightly during cooling or be locked in place. • Good practice in sequencing – typical recommendations for minimizing residual stress and cracking.

💭 Think About

• Which choice would reduce distortion and residual stress by allowing the weld to move or relieve stress as it cools, rather than locking it in? • Look at each option and ask: does this action encourage or prevent stress relief during cooling? • Consider what happens if you weld or restrain the areas of maximum contraction too early – how would that affect cracking risk?

✅ Before You Answer

• For each option, picture the plate shrinking as it cools: does the sequence give the metal room to move? • Be cautious of any wording that effectively locks in stresses early or encourages welding across unrestrained joints. • Ask whether a recognized good practice is to weld the most critical/maximum contraction joints first or last when trying to control distortion.

Which of the following statements is correct concerning welding sequences?

First, weld the joints that will tend to contract the most.

First, weld attachments which will restrain points of maximum contraction.

Make a weld across an unwelded plate joint in adjoining members.

Each successive welded part should be restrained to lock in stresses and avoid cracking.

🔍 Key Concepts

💭 Think About

✅ Before You Answer