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Workshop Technology

Workshop Technology
The recrystallisation temperature of steel is

600°C
400°C
800°C
None of these

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Workshop Technology
The advantage of Thermit welding is that

All parts of the weld section are molten at the same time
All of these
Weld cools almost uniformly
Results in a minimum problem with internal residual stresses

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Workshop Technology
The minimum size of a bloom is

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

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Workshop Technology
For cutting brass, the hacksaw blade should have ________ teeth per 25 mm.

24
14
40
32

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Workshop Technology
The upsetting is a process of

Reducing the cross-section of a bar
Increasing the cross-section of a bar
Bending of a bar
Joining the two surfaces of metal under pressure after heating

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Workshop Technology
In electric resistance welding, pressure applied varies from

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

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