Discussion
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- Question
Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a __________ operation.
Options- A. clarification
- B. sedimentation
- C. flocculation
- D. classification
- Correct Answer
- classification
- 1. For classification of potable (drinking) water, we use a __________ filter.
Options- A. gravity sand
- B. plate and frame
- C. vacuum leaf
- D. rotary vacuum Discuss
- 2. Which of the following may prove unsuitable for filtering volatile liquids?
Options- A. Pressure filter
- B. Gravity filter
- C. Centrifugal filter
- D. Vacuum filter Discuss
- 3. For coarse reduction of hard solids, use
Options- A. impact
- B. attrition
- C. compression
- D. cutting Discuss
- 4. Which of the following crushing laws is most accurately applicable to the fine grinding of materials?
Options- A. Bond's crushing law
- B. Kick's law
- C. Rittinger's law
- D. None of these. Discuss
- 5. As per Taggart's formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms )
Options- A. LS
- B. 93 LS
- C. 250 LS
- D. LS Discuss
- 6. __________ mean diameter of particles is given by
Options- A. Mass
- B. volume
- C. Arithmetic
- D. Volume surface Discuss
- 7. Vibrating screens have capacity in the range of __________ tons/ft2 .mm mesh size.
Options- A. 0.2 to 0.8
- B. 5 to 25
- C. 50 to 100
- D. 100 to 250 Discuss
- 8. Cake resistance is
Options- A. important in the beginning of filtration.
- B. decreased with the time of filtration.
- C. independent of pressure drop.
- D. none of these. Discuss
- 9. __________ is used for producing a thick suspension from a thin slurry.
Options- A. Cartridge filter
- B. Rotary drum vacuum filter
- C. Pressure filter thickener
- D. Plate and frame filter press Discuss
- 10. During size reduction by a jaw crusher, the energy consumed decreases with the
Options- A. decreasing size of product at constant size of feed.
- B. decreasing machine capacity.
- C. increasing size of feed at constant reduction ratio.
- D. none of these. Discuss
Mechanical Operations problems
Search Results
Correct Answer: gravity sand
Correct Answer: Vacuum filter
Correct Answer: compression
Correct Answer: Rittinger's law
Correct Answer: 93 LS
Correct Answer: volume
Correct Answer: 0.2 to 0.8
Correct Answer: none of these.
Correct Answer: Pressure filter thickener
Correct Answer: increasing size of feed at constant reduction ratio.
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