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Workshop Technology

Workshop Technology
The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called

Piercing
Shearing
Blanking
Punching

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Workshop Technology
Tandem drawing of wires and tubes is necessary because

Surface finish improves after every drawing stage
It is not possible to reduce at one stage
Annealing is needed between stages
Accuracy in dimensions is not possible otherwise

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Workshop Technology
Structural sections such as rails, angles, I-beams are made by

Hot extrusion
Hot piercing
Hot drawing
Hot rolling

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Workshop Technology
Aluminium is the best material for making patterns because it is

Light in weight
All of the listed here
Easy to work
Corrosion resistant

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Workshop Technology
The oxyacetylene gas used in gas welding produce a flame temperature of

2100°C
3200°C
2400°C
1800°C

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Workshop Technology
The mode of deformation of the metal during spinning is

Bending
Rolling and stretching
Stretching
Bending and stretching

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