The figure below shows the cumulative size distribution of particles of a crushed mineral. 10 kg of this material is first passed through a sieve of size 400 micron and then through a sieve of size 300 micron. The weight of mineral (in kg ) that is retained on the 300 micron sieve is . . . . . . . .

Separation of particles of various sizes, shapes & densities by allowing them to settle in a fluid is called

A. classification

B. froth floatation

C. Thickening

D. none of these

During filtration operation, the filtrate encounters the resistance of the

A. filter medium

B. cake

C. channel carrying the slurry to then upstream side of the cake and filtrate away from the filter medium

D. all A, B and C

Match the following:

A. P-2, Q-1, R-4, S-3

B. P-1, Q-2, R-3, S-4

C. P-3, Q-4, R-1, S-2

D. P-4, Q-3, R-2, S-1

The capacity of a pneumatic conveying system depends upon the

A. bulk density of materials

B. pressure of the conveying air

C. diameter of the conveying line

D. all A, B and C