question_answer

Cold working produces the following effects:

1. Stresses are set up in metal

2. Grain structure gets distorted

3. Strength and hardness of the metal are de- creased

4. Surface finish is reduced

Which of these statements are correct?

A) 1 and 2            

B) 1, 2 and 3

C) 3 and 4            

D) 1 and 4