Mechanical Operations MCQs

Question 1

Where the density difference of the two liquid phase to be separated is very small (as in milk cream separator), the most suitable separator is a

Accepted Answer

Disc bowl centrifuge

Answer

Sharpies supercentrifuge

Answer

Batch basket centrifuge

Answer

Sparkler filter

Question 2

Flow of filtrate through the cake in a plate and frame filter press is best described by the __________ equation.

Accepted Answer

Kozney-Karman

Answer

Hagen-Poiseulle's

Answer

Fanning's

Answer

Kremser

Question 3

In a grinding operation, the limiting particle size is the size of the __________ particle in the sample.

Accepted Answer

Neither A nor B

Answer

Smallest

Answer

Largest

Answer

Either A or B

Question 4

Which of the following is not a non-metalliferous mineral?

Accepted Answer

Cassiterrite

Answer

Calcite

Answer

Fluorspar

Answer

Quartz

Question 5

Width and speed of a conveyor belt depends upon the __________ of the material.

Accepted Answer

Both A & B

Answer

Lump size

Answer

Bulk density

Answer

Neither A nor B

Question 6

What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?

Accepted Answer

32°

Answer

16°

Answer

40°

Answer

46°

Question 7

Removal of activated carbon from glycerine is done by

Accepted Answer

Plate and frame filter

Answer

Rotary vacuum filter

Answer

Batch basket centrifuge

Answer

None of these

Question 8

The unit of specific cake resistance is

Accepted Answer

Gm/cm 2

Answer

Cm/gm

Answer

Cm/gm 2

Answer

Gm/gm

Question 9

If a force greater than that of gravity is used to separate solids & fluids of different densities, the process is termed as the

Accepted Answer

Centrifugation

Answer

Sedimentation

Answer

Flocculation

Answer

Dispersion