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Workshop Technology

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

Age hardening
Flame hardening
Work hardening
Induction hardening

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Workshop Technology
A two high rolling mill consists of two rolls which rotate

At the same speed but in opposite direction
At the same speed and in the same direction
At different speeds and in the opposite direction
At different speeds and in the same direction

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Workshop Technology
The minimum size of a bloom is

10 cm × 10 cm
20 cm × 20 cm
15 cm × 15 cm
5 cm × 5 cm

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

Eutectic temperature
Upper critical temperature
Recrystallisation temperature
Lower critical temperature

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Workshop Technology
The process of decreasing the cross-section of a bar and increasing its length, is called

Upsetting
Spinning
Drawing down
Peening

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Workshop Technology
For welding plates of thickness more than 12.5 mm, its edges

Should be bevelled to a single-V or U-groove
Do not require bevelling
Should have a double-V or U-groove on one side
Should have a double-V or U-groove on both sides

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