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Workshop Technology

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

Red colour
Black colour
Yellow colour
Blue colour

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Workshop Technology
Cold working of metal increases

Hardness
Yield strength
Tensile strength
All of these

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Workshop Technology
According to Indian standards, the total numbers of tolerance grades are

8
12
20
18

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

Work hardening
Age hardening
Flame hardening
Induction hardening

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Workshop Technology
The minimum size of a bloom is

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

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Workshop Technology
In welding magnesium with TIG arc welding, direct current with ________ is used.

Both (A) and (B)
Straight polarity
None of these
Reversed polarity

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