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Workshop Technology

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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Workshop Technology
A pattern maker's shrinkage rule considers

All materials to be cast
All materials of the pattern
Only shrinkage allowance
All pattern allowances

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Workshop Technology
A casting defect which occurs due to improper venting of sand is known as

Cold shuts
Shift
Swell
Blow holes

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Workshop Technology
In sheet metal work, he cutting force on the tool can be reduced by

Grinding the cutting edges sharp
Increasing the hardness of die
Increasing the hardness of tool
Providing shear on tool

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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
Results in a minimum problem with internal residual stresses
Weld cools almost uniformly
All of these

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Workshop Technology
When the dimension is expressed as 20­ -0.025 ⁺⁰∙⁰³⁵, then the basic size is

20.025 mm
19.975 mm
20.035 mm
20 mm

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