Question: A rolls crusher, 1 . 8 m in diameter, is set so that the crushing surfaces are 2 0 mm apart. The coefficient of friction

A rolls crusher, 1.8 m in diameter, is set so that the crushing surfaces are 20 mm apart. The
coefficient of friction between the rolls and the particle is 0.20. What is the maximum angle
of nip, and what is the maximum size of particle which should be fed to the rolls for the
crusher working at the maximum angle of nip?

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