What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?
Correct answer: B. 32°
- A. 16°
- B. 32°
- C. 40°
- D. 46°
Explanation
For smooth steel rolls crushing ordinary rock, the usual angle of nip is about 32°. The nip angle must be small enough for friction to grip and draw the particles into the rolls.
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