The unit of specific cake resistance is______________________?
The unit of specific cake resistance is______________________?
A. gm/cm2
B. cm/gm
C. cm/gm2
D. gm/gm
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The main size reduction operation in ultrafine grinders is_____________?
The main size reduction operation in ultrafine grinders is_____________?A. Cutting
B. Attrition
C. Compression
D. ImpactThe porosity of a compressible cake is _____________________?
The porosity of a compressible cake is _____________________?A. Minimum at the filter medium
B. Minimum at the upstream face
C. Maximum at the filter medium
D. Same throughout the thickness of cakeWet grinding in a revolving mill ______________ as compared to dry grinding ?
Wet grinding in a revolving mill ______________ as compared to dry grinding ?A. Gives less wear on chamber walls
B. Requires more energy
C. Increases capacity
D. Complicates handling of the productActual 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 millsEnergy consumption in a crusher decreases with increase in the________________________?
Energy consumption in a crusher decreases with increase in the________________________?A. Size of the product (at constant feed size)
B. Capacity of the crushing machine
C. Size of feed (at constant reduction ratio)
D. All A., B. & C.Bucket elevators are not suitable for the vertical lifting of __________ materials?
Bucket elevators are not suitable for the vertical lifting of __________ materials?A. Fine (e.g. – 200 mesh size coal)
B. Sticky (e.g. clay paste)
C. Small lumpy (e.g. grains and sand)
D. Free flowing