Workshop Technology
In welding magnesium with TIG arc welding, direct current with ________ is used.

Straight polarity
None of these
Both (A) and (B)
Reversed polarity

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
A jolt machine is used to

Produce uniform packing of sand in the mould
Produce uniform sand hardness throughout the mould
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Ram the sand harder at the back of the mould and softer on the pattern face

ANSWER DOWNLOAD EXAMIANS APP