Half the angle of nip, (α), for a roll crusher is given by (where, dr – McqOptions

MCQOPTIONS

1.	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)
Answer» B. cos α = (dr + df)/(dr + dp)

Discussion

No Comment Found

Related MCQs

Which of the following terminology is not used for size reduction of materials to fine sizes or powders ?
Width and speed of a conveyor belt depends upon the ______________ of the material?
With increase in drum speed, in a rotary drum filter, the filtration rate_______________?
With increase in the capacity of screens, the screen effectiveness__________________?
With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge________________?
Work index is defined as the_________________?
Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding?
Xanthates are used in the froth floatation process as a/an _______________________?
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 ?
Which of the following oxides is not present in hematite iron ore ?