Workshop Technology
Swab is used for

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

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Workshop Technology
Linde welding uses

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

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Workshop Technology
A progressive limit gauge has

None of the listed here
Separate 'Go' and 'Not go' members
'Go' member at one end and 'Not go' member at the other end
'Go' and 'Not go' member on the same side of the gauge

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