List of top Pharmaceutical Engineering Questions on Size reduction and size separation asked in Graduate Pharmacy Aptitude Test

Which of the following mills is based on the mechanism of impact and attrition for size reduction:

This given equation represents which law: \(E=K_k\ ln \frac {d_1}{d_2}\)

Which of the following is the correct choice of particle size measurement technique in scoring order ofsize?
(i) Sieve
(ii) Anderson Pipette
(iii) Coulter counter
(iv) Light scattering
Arrange the correct order

R_i Hingers hypothesis relates
(i) Energy used in size reduction
(ii) New surface area produced
(iii) Equivalent shape
(iv) Reynold’s number
Arrange the correct order

Hardinge mill is a variant of:

The angle of repose is calculated by

Which of the following are characteristics for colloid mills
(P) Due to centrifugal forces, the mill undergoes periodical vibratory movement
(Q) Particles smaller than 1 μm can be obtained with them
(R) The main types of colloid mills are hammer, turbine and dial mills
(S) The principle of their operation is based on the abrasion of particles at high speed

How much can be the working revolution per minute (RPM) of the ball mill

Impact and attrition are principles of which device?