Workshop Technology
In a ___ two or more operations are performed simultaneously at the single stroke of the ram.

Compound die
Progressive die
Simple die
Combination die

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Workshop Technology
Linde welding uses

Carburising flame and rightward technique
Neutral flame and leftward technique
Oxidizing flame and leftward technique
Neutral flame and rightward technique

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Workshop Technology
Riddle is used for

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

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