Workshop Technology
The welding process used in joining mild steel shanks to high speed drills, is

Flash butt welding
Seam welding
Upset butt welding
Spot welding

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Workshop Technology
A jolt machine is used to

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
Produce uniform packing of sand in the mould

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Workshop Technology
Notching is the operation of

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

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