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Q:- Which one of the following statements is false :

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(a) Surface breaking defects are usually more detrimental to a weld in Comparison with sub-surface defects.

(b) The HAZ’s of a steel weld usually have a higher tensile strength than The weld metal.

(c) Lameller tearing may occur within the fusion zone of large fillet welds.

(d) PWHT may stress relieve.