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Workshop Technology

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

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

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Workshop Technology
Cores are used to

Improve mould surface
Form internal cavities in the casting
Form a part of a green sand mould
All of these

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

Yellow colour
Red colour
Black colour
Blue colour

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Workshop Technology
In electric resistance welding, pressure applied varies from

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

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

Hot piercing
Hot rolling
Hot drawing
Hot extrusion

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Workshop Technology
The operation of producing cup shaped parts from flat sheet metal blanks by bending and plastic flow of metal, is known as

Coining
Squeezing
Drawing
Planishing

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