Workshop Technology
During cold working process

Strength and hardness of metal increases
Close dimensional tolerance can be maintained
Grain structure is distorted
All of the listed here

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Workshop Technology
In a compound die

Only one operation is performed at each stroke of the ram
Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
Two or more operations are performed simultaneously at the single stroke of the ram
Two or more cutting operations are performed at one station of the press in every stroke of the ram

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Workshop Technology
Riddle is used for

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

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