Manufacturing And Production Technology
What is the type of joining process called, where the parts to be welded are kept in contact and rotated relative to each other and axial pressure is applied when the desired temperature is obtained?

Forge welding
Ultrasonic welding
Friction welding
Electron beam welding

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Manufacturing And Production Technology
A better machinable metal is one which gives

Higher chip-tool contact area and smaller shear angle
Lower chip-tool contact area and larger shear angle
Lower chip-tool contact area and smaller shear angle
Higher chip-tool contact area and larger shear angle

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