Separation of particles of various sizes, shapes and densities by allowing them to settle in a fluid is called__________________?

Byadmin February 18, 2019August 22, 2021

Separation of particles of various sizes, shapes and densities by allowing them to settle in a fluid is called__________________?

A. Classification
B. Froth floatation
C. Thickening
D. Clarification

Mechanical Operations

Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them ?

Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them ?

A. Jaw crusher, Ball mill, Fluid energy mill
B. Ball mill, Jaw crusher, Fluid energy mill
C. Fluid energy mill, Jaw crusher, Ball mill
D. Fluid energy mill, Ball mill, Jaw crusher

Read More Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them ?
Mechanical Operations

Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed ?

Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed ?

A. Wet grinding in low viscous suspension
B. Wet grinding in high viscous suspension
C. Dry grinding of large particles (upto 1.25 cms)
D. Dry grinding of large particles in un-baffed mills

Read More Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed ?
Mechanical Operations

The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a __________________?

The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a __________________?

A. Boundary mixer
B. Propeller agitator
C. Sharpies centrifuge
D. None of these

Read More The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a __________________?
Mechanical Operations

Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the___________________?

Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the___________________?

A. Coagulation
B. Flocculation
C. Sedimentation
D. Clarification

Read More Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the___________________?
Mechanical Operations

The optimum moisture content in solids to be crushed/ground ranges from _______________ percent?

The optimum moisture content in solids to be crushed/ground ranges from _______________ percent?

A. 3 to 4
B. 8 to 10
C. 10 to 15
D. 15 to 20

Read More The optimum moisture content in solids to be crushed/ground ranges from _______________ percent?
Mechanical Operations

Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the ______________________?

Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the ______________________?

A. State or manner of application of the crushing force
B. Ultimate strength of the material
C. Elastic constant of the material
D. All A., B. and C.

Read More Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the ______________________?

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