Q1: Consider the following statements :
1. Welded structures are usually lighter than riveted structures.
2. Welding allows the arrangement of structural components in such a manner that the joint provides maximum efficiency.
3. During welding, the members do not get distorted.
Of these statements :

ANS:A - 1, 2 and 3 correct

Yes, thin sheets (MS or SS) Cannot withstand higher temperatures during welding so they get disorted& deform easily. So proper sheet thickness has to be maintained for perfect joint welding. But here actually statement refers to when two suitable metals, with appropriate thickness & chemical composition, when subjected to welding they don't deform.