Q1. With reference to electric arc welding:
(a) Draw a labelled sectional sketch of a satisfactory butt weld. (4)
(b) Briefly define the following defects that may occur and how they may have been caused: (12)
(i) Under cut
(ii) Splatter
(iii) Inclusion
(iv) Blow hole
(v) Incomplete root penetration
(vi) Lack of fusion
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