ANSWER
(i) To dissolve any oxide that is present on metal surface.
(ii) To prevent corrosion or oxidation by excluding air.
(iii) It enables spelter to flow easily along the joint.
(iv) It enables solder to adhere to metal surface.
ANSWER
(i) To dissolve any oxide that is present on metal surface.
(ii) To prevent corrosion or oxidation by excluding air.
(iii) It enables spelter to flow easily along the joint.
(iv) It enables solder to adhere to metal surface.
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