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February 2019

Half the angle of nip, (α), for a roll crusher is given by (where, dr, dp and df are diameters of crushing rolls, feed particles and rolls gap respectively) ?

Mechanical Operations /
Half the angle of nip, (α), for a roll crusher is given by (where, dr, dp and df are diameters of crushing rolls, feed particles and rolls gap respectively) ?

A. cos α = (dr + dp)/(dr + df)
B. cos α = (dr + df)/(dr + dp)
C. tan α = (dr + dp)/(dr + df)
D. sin α = (dr + dp)/(dr + df)

Half the angle of nip, (α), for a roll crusher is given by (where, dr, dp and df are diameters of crushing rolls, feed particles and rolls gap respectively) ? Read More »

Mechanical Operations

For achieving maximum capacity of the ball mill, the ball charge should be equal to about ______________ percent of the ball mill volume?

Mechanical Operations /
For achieving maximum capacity of the ball mill, the ball charge should be equal to about ______________ percent of the ball mill volume?

A. 10
B. 25
C. 50
D. 75

For achieving maximum capacity of the ball mill, the ball charge should be equal to about ______________ percent of the ball mill volume? Read More »

Mechanical Operations