Cold working produces the following effects 1. Stresses

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Cold working produces the following effects
1. Stresses are set up in the material
2. Grain structure get distorted
3. Strength and hardness of the metal are increased
4. Surface finish is reduced

1. 1 and 2
2. 1, 2 and 3
3. 3 and 4
4. 1 and 4

Correct Option: A

Stress are build up due to strain hardening & Grain structure distortion.