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Workshop Technology

Workshop Technology
Cold working of metal increases

Hardness
All of these
Tensile strength
Yield strength

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

Flow of current
Voltage
Contact resistance
All of these

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Workshop Technology
The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as

Hot piercing
Cold heading
Extrusion
Cold peening

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Workshop Technology
The temperature at which the new grains are formed in the metal is called

Lower critical temperature
Eutectic temperature
Recrystallisation temperature
Upper critical temperature

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Workshop Technology
The cold chisels are made by

Drawing
Rolling
Piercing
Forging

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Workshop Technology
In electric resistance welding, pressure applied varies from

25 to 55 MPa
5 to 10 MPa
1 to 5 MPa
10 to 25 MPa

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