Workshop Technology
For arc welding

Alternating current with high frequency is used
Any one of these
Direct current is used
Alternating current with low frequency is used

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
Riddle is used for

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

ANSWER DOWNLOAD EXAMIANS APP