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?

Ultrasonic welding
Forge welding
Friction welding
Electron beam welding

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Manufacturing And Production Technology
In a shaper, the length of stroke is increased by

Increasing the length of the arm
Decreasing the length of the slot in the slotted lever
Decreasing the centre distance of bull gear and crank pin
Increasing the centre distance of bull gear and crank pin

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