Chemical Engineering MCQs

A. Produces mainly axial flow
B. Is used for mixing high viscosity pastes
C. Runs at very slow speed (2 rpm)
D. All a., b. and c.

A. Canvas fabric
B. Diatomaceous earth
C. Calcined lime
D. None of these

A. Surface energy created by crushing to the energy absorbed by the solid
B. Energy absorbed by the solid to that fed to the machine
C. Energy fed to the machine to the surface energy created by crushing
D. Energy absorbed by the solid to the surface energy created by crushing

A. Tons/hr
B. Tons/ft2
C. Both a. & b.
D. Tons/hr-ft2

A. Cutting action
B. Compression
C. Compression and tearing
D. Impact and attrition

A. Primary
B. Secondary
C. Fine
D. Ultrafine

A. 3
B. 30
C. 85
D. 25

A. Disc bowl centrifuge
B. Sharpies super-centrifuge
C. Batch basket centrifuge
D. Sparkler filter

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

A. Nc = (1/4π). √(g/r1 – r2)
B. Nc = (1/2π). √(g/r1 – r2)
C. Nc = (1/π). √(g/r1 – r2)
D. Nc = (1/2π). √(r1 – r2/g)