Which of the following is not true for Thermit Welding.*a) It is a welding process for joining two electrical conductor, that employs superheated copper alloy to permanently join the conductors.b) When molten, the flux becomes conductive, and provides a current path between the electrode and the work.c) The process employs an exothermic reaction of a copper thermite composition to heat the copper, and requires no external source of heat or current.d) The reactants are usually supplied in the form of powders, with the reaction triggered using a spark from a flint lighter

sketch and explain the soldification process of welding

When a metal (such as copper) is heated, itexpands. Explain what happens to the metalparticles as the solid metal expands.

Explain using a diagram each of the following welding processes, suggesting the advantages anddisadvantages of each process. For each process suggest a common application: T.I.G/T.A.G [5] M.I.G/M.A.G [5] Resistance welding and seam welding [8] Stud welding [5

Define Welding. list the types of welding and also classify the welding.

Which one of the following processes involve chemical reactions?(a) Storing of oxygen gas under pressure in a gas cylinder(b) Liquefaction of air(c) Keeping petrol in a china dish in the open(d) Heating copper wire in presence of air at high temperature