Workshop Technology
During hot working of metals

Porosity of the metal is largely eliminated
All of the listed here
Grain structure of the metal is refined
Mechanical properties are improved due to refinement of grains

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
Riddle is used for

Reinforcement of sand in the top part of moulding box
Smoothing and cleaning out depressions in the mould
Cleaning the moulding sand
Moistening the sand around the edge before removing pattern

ANSWER DOWNLOAD EXAMIANS APP