Ultra centrifuges are used for the separation of _____________ solid particles?
A. Coarse
B. Fine
C. Colloidal
D. Dissolved
Ultra centrifuges are used for the separation of _____________ solid particles? Read More »
Mechanical Operations A. Coarse
B. Fine
C. Colloidal
D. Dissolved
Ultra centrifuges are used for the separation of _____________ solid particles? Read More »
Mechanical Operations A. Sizing
B. Sorting
C. Classification
D. Flocculation
A. 0.9
B. 0.78
C. 0.6
D. 0.5
The sphericity of a cylinder of 1 mm diameter and length 3 mm is_________________? Read More »
Mechanical Operations A. Dicers
B. Knife cutters
C. Slitters
D. Tube mills
Which of the following is not a cutting machine ? Read More »
Mechanical Operations A. 1.5
B. 1
C. √2
D. None of these
A. Heavy loads & short runs
B. Small loads & long runs
C. Heavy loads & long runs
D. None of these
Apron conveyors are used for ___________________ ? Read More »
Mechanical Operations A. Trough washer
B. Baum jig washer
C. Spiral separator
D. Froth floatation
Which of the following is the most suitable for cleaning of fine coal dust ( Read More »
Mechanical Operations A. [(DP/18). (ρs – ρ/μ)] ω2r
B. [(DP2/18). (ρs – ρ/μ)] ω2r
C. [(DP/18). (ρs – ρ/μ)] ω2r2
D. [(DP2/18). (ρs – ρ/μ)] ω2r
A. Is defined as the ratio of surface area of a sphere having the same volume as the particle to the
actual surface area of the particle
B. Has the dimension of length
C. Is always less than 1
D. Is the ratio of volume of a sphere having the same surface area as the particle to the actual
volume of the particle
For a non-spherical particle, the sphericity__________________? Read More »
Mechanical Operations A. Size
B. Specific gravity
C. Terminal velocities in the same fluid & in the same field of force
D. None of these
Two particles are called to be equal settling, if they are having the same ? Read More »
Mechanical Operations