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

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

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
Lancing is the operation of

Bending a sheet of metal along a curved axis
Removal of metal to the desired shape from the edge of a plate
Cutting a sheet of metal through part of its length and then bending the cut portion
Cutting a sheet of metal in a straight line along the length

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
Spot welding is used for welding

Butt joints in plates having 0.025 mm to 1.25 mm thickness
Butt joints in plates having thickness above 3 mm
Lap joints in plates having thickness above 3 mm
Lap joints in plates having 0.025 mm to 1.25 mm thickness

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
The purpose of a riser is to

Deliver the molten metal from pouring basin to gate
Act as a reservoir for the molten metal
Deliver molten metal into the mould cavity
Feed the molten metal to the casting in order to compensate for the shrinkage

ANSWER DOWNLOAD EXAMIANS APP