The process opposite to ‘dispersion’ is termed as the___________________?
A. Flocculation
B. Sedimentation
C. Filtration
D. None of these
Mechanical Operations
Screen capacity is proportional to (where, S = screen aperture)____________________?
Screen capacity is proportional to (where, S = screen aperture)____________________?
A. S
B. 1/S
C. S2
D. √S
Screen capacity is not a function of__________________?
Screen capacity is not a function of__________________?
A. Its openings size
B. Screening mechanism
C. Screening surface
D. Atmospheric humidity
Limestone is normally crushed in a _____________________?
Limestone is normally crushed in a _____________________?
A. Roll crusher
B. Hammer crusher
C. Ball mill
D. Tube mill
The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size)?
The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size)?
A. c/s
B. s/c
C. s . c
D. 1/s . c
The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant ______________ filtration?
The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant ______________ filtration?
A. Rate
B. Pressure
C. Both A. & B.
D. Neither A. nor B.
Temperature of the product during ultrafine grinding_____________________?
Temperature of the product during ultrafine grinding_____________________?
A. Increases
B. Decreases
C. Remain constant
D. May increase or decrease; depends on the material being ground
To produce talcum powder, use_____________________?
To produce talcum powder, use_____________________?
A. Ball mill
B. Hammer mill
C. Jet mill
D. mill
As the product becomes finer, the energy required for grinding___________________?
As the product becomes finer, the energy required for grinding___________________?
A. Decreases
B. Increases
C. Is same as for coarser grinding
D. Is 1.5 times that for coarser grinding
Choke crushing (in case of a Jaw crusher) compared to free crushing__________________?
Choke crushing (in case of a Jaw crusher) compared to free crushing__________________?
A. Results in increased capacity
B. Consumes less power
C. Consumes more power
D. Both A. and C.