Which of the following relationships between co-efficient of friction (μ) between rock & roll and a (half of the angle of nip) of the particle to be crushed is correct ? | MCQ Hive

Chemical Engineering

Q Which of the following relationships between co-efficient of friction (μ) between rock & roll and a (half of the angle of nip) of the particle to be crushed is correct ?

A A. Μ > tan α
B B. Μ ≥ tan α
C C. Μ > tan 2α
D D. Μ ≤ tan α

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