Workshop Technology
For welding plates of thickness more than 12.5 mm, its edges

Should have a double-V or U-groove on one side
Should have a double-V or U-groove on both sides
Should be bevelled to a single-V or U-groove
Do not require bevelling

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Workshop Technology
A progressive limit gauge has

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

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