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) ?
Correct answer: A. cos α = (dr + dp)/(dr + df)
- 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)
Explanation
For a roll crusher, the geometric nip relation is cos α = (dr + dp)/(dr + df), where the feed particle diameter and roll gap determine the limiting contact angle. The other expressions use the wrong trigonometric function or interchange the size terms.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Process Principles
2,710 free Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Process Principles questions
Mixer used for rubber compounding is__________________?
Froth floatation is the most suitable for treating ____________________?
Capacity of flight conveyor in tons/hr is given by (where, W & D = width and depth of flight respectively in metre V = speed of the conveyor, metre/second ρ = bulk density of material, kg/m3) ?
For achieving maximum capacity of the ball mill, the ball charge should be equal to about ______________ percent of the ball mill volume?
_______________ mill is normally used for grinding of talc?
Which of the following terminology is not used for size reduction of materials to fine sizes or powders ?