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Workshop Technology

Workshop Technology
The parts of circular cross-section which are symmetrical about the axis of rotation are made by

Hot forging
Hot extrusion
Hot drawing
Hot spinning

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Workshop Technology
In arc welding, the electric arc is produced between the work and the electrode by

Voltage
Flow of current
Contact resistance
All of these

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Workshop Technology
A casting defect which results in general enlargement of a casting is known as

Sand wash
Shift
Scab
Swell

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Workshop Technology
A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as

Sand wash
Shift
Scab
Swell

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Workshop Technology
A zinc diffusion process is called

Sherardizing
Anodizing
Parkerising
Galvanizing

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Workshop Technology
The draft or taper allowance on casting is generally

5 to 10 mm/m
1 to 2 mm/m
10 to 15 mm/m
2 to 5 mm/m

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