What is the velocity of the steel at the bottom of the sprue if the sprue height is $$30$$ $$cm$$? Assume the frictional and other losses to be $$20\% $$

Green strength in powder metallurgy refers to the strength of

The process by which shell like castings (like toys) are made is

Poor collapsibility of the mold leads to .......... type of casting defect in aluminium castings.