Workshop Technology
V-block is used to

Check the surface roughness
Locate centres of round rods
Check the trueness of flat surfaces
None of these

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Workshop Technology
Spot welding is used for welding

Lap joints in plates having thickness above 3 mm
Butt joints in plates having thickness above 3 mm
Lap joints in plates having 0.025 mm to 1.25 mm thickness
Butt joints in plates having 0.025 mm to 1.25 mm thickness

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