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Workshop Technology

Workshop Technology
In TIG arc welding, the welding zone is shielded by an atmosphere of

Either (A) or (B)
Argon gas
None of these
Helium gas

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Workshop Technology
During cold working process

Grain structure is distorted
Close dimensional tolerance can be maintained
Strength and hardness of metal increases
All of the listed here

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Workshop Technology
In arc welding, the temperature of heat produced by the electric arc is of the order of

4000°C to 5000°C
6000°C to 7000°C
5000°C to 6000°C
3000°C to 4000°C

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Workshop Technology
Acetylene gas is stored in cylinders in

Liquid form
Solid form
Gaseous form
Any one of the listed here

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Workshop Technology
In backhand welding, the angle between the welding torch and the work is kept as

30°-40°
40°-50°
50°-60°
60°-70°

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

Black colour
Yellow colour
Blue colour
Red colour

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