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Workshop Technology

Workshop Technology
Thread rolling is restricted to

Ductile materials
Ferrous materials
Hard materials
None of these

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Workshop Technology
Green sand is a mixture of

70% sand and 30% clay
50% sand and 50% clay
30% sand and 70% clay
90% sand and 10% clay

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

Black colour
Red colour
Yellow colour
Blue colour

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

2100°C
1800°C
3200°C
2400°C

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

Red colour
Yellow colour
Black colour
Blue colour

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Workshop Technology
The hot working of metals is carried out

At the recrystallisation temperature
Below the recrystallisation temperature
Above the recrystallisation temperature
At any temperature

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