Workshop Technology
In a centrifugal casting method

No core is used
Core is made of nonferrous metal
Core is made of sand
Core is made of ferrous metal

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A progressive limit gauge has

Separate 'Go' and 'Not go' members
None of the listed here
'Go' member at one end and 'Not go' member at the other end
'Go' and 'Not go' member on the same side of the gauge

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Extrusion

Is extensively used for making bolts and nuts
Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work
Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

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