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Workshop Technology

Workshop Technology
In arc welding, the electric arc is produced between the work and the electrode by

Contact resistance
Flow of current
Voltage
All of these

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Workshop Technology
A file removes the metal during

Both forward and return strokes
Return stroke
Forward stroke
None of these

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Workshop Technology
The blank diameter used in thread rolling will be

A little larger than the pitch diameter of the thread
A little larger than the minor diameter of the thread
Equal to pitch diameter of the thread
Equal to minor diameter of the thread

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Workshop Technology
In welding copper alloys with TIG arc welding

Direct current with reversed polarity is used
Alternating current is used
Any one of the listed here
Direct current with straight polarity is used

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Workshop Technology
The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)

6 t
3 t
1.5 t
√t

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Workshop Technology
The surface to be machined is marked on the pattern by

Red colour
Yellow colour
Blue colour
Black colour

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