Green sand mould indicates that

A cubic casting of $$50mm$$ side undergoes volumetric solidification shrinkage and volumetric solid contraction of $$4\% $$ and $$6\% $$ respectively. No riser is used. Assume uniform cooling in all directions. The side of cube after solidification and contraction is

The maximum possible draft in cold rolling of sheet increases with the

Which one among the following welding processes uses non-consumable electrode?