Mechanical Engineering - Workshop Technology - Discussion

4. 

Extrusion

[A]. is extensively used for making bolts and nuts
[B]. is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work
[C]. is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
[D]. 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

Answer: Option D

Explanation:

No answer description available for this question.

Bidhan said: (Mar 18, 2019)  
A for Cold Heading.
B for Rotatory swing.
C for Sheert peening.

Vijay Vyas said: (Jul 25, 2019)  
Right, Thanks @Bidhan.

Salahuddin said: (Mar 13, 2020)  
A - Cold heading or else Upsetting.
B - Rotary Swagging.
C - Shot peening.

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