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Workshop Technology

Workshop Technology
In electric resistance welding, pressure applied varies from

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

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Workshop Technology
A casting defect which occurs due to improper venting of sand is known as

Cold shuts
Shift
Blow holes
Swell

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Workshop Technology
For gas welding, the pressure desired at the welding torch for oxygen is

70 to 280 kN/m²
7 to 103 kN/m²
280 to 560 kN/m²
560 to 840 kN/m²

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Workshop Technology
Seam welding is best adopted for metal thickness ranging from

3 to 5 mm
5 to 8 mm
8 to 10 mm
0.025 to 3 mm

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Workshop Technology
The increase in hardness due to cold working, is called

Flame hardening
Work hardening
Age hardening
Induction hardening

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Workshop Technology
A moving mandrel is used in

Wire drawing
Metal cutting
Tube drawing
Forging

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