Discussion
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- Question
Close circuit grinding by a ball mill with air sweeping employs a
Options- A. classifier.
- B. cyclone separator between mill & classifier.
- C. both (a) & (b).
- D. neither (a) nor (b).
- Correct Answer
- both (a) & (b).
- 1. Which of the following is a coarse crusher?
Options- A. Smooth roll crusher
- B. Toothed roll crusher
- C. Gyratory crusher
- D. Tube mill Discuss
- 2. Paddle agitator
Options- A. is suitable for mixing low viscosity liquids.
- B. produces axial flow.
- C. moves at very high speed.
- D. none of these. Discuss
- 3. The specific cake resistance for incompressible sludges is (where ?P = pressure drop over cake)
Options- A. ? ?P
- B. ? 1/ ?P
- C. ? ?P
- D. independent of ?P Discuss
- 4. Soft & non-abrasive materials can be made into fines by
Options- A. attrition
- B. compression
- C. cutting
- D. none of these Discuss
- 5. Separation of solid particles based on their densities is called
Options- A. sizing
- B. sorting
- C. clarification
- D. dispersion Discuss
- 6. Gelatinous solid (which plug the septum) can be filtered by a __________ filter.
Options- A. sparkler
- B. plate and frame
- C. vacuum leaf
- D. precoat Discuss
- 7. Sorting classifiers employing differential settling methods for separation of particles make use of the differences in their
Options- A. particle sizes
- B. densities
- C. terminal velocities
- D. none of these Discuss
- 8. Toothed roll crushers achieve size reduction by
Options- A. tearing (shear) and compression.
- B. impact and attrition.
- C. both (a) & (b).
- D. neither (a) nor (b). Discuss
- 9. Which of the following oxides is not present in hematite iron ore?
Options- A. Titanium oxide
- B. Calcium oxide
- C. Cobalt oxide
- D. Manganese oxide Discuss
- 10. Choke crushing (in case of a Jaw crusher) compared to free crushing
Options- A. results in increased capacity.
- B. consumes less power.
- C. consumes more power.
- D. both (a) and (c). Discuss
Mechanical Operations problems
Search Results
Correct Answer: Gyratory crusher
Correct Answer: is suitable for mixing low viscosity liquids.
Correct Answer: independent of ?P
Correct Answer: attrition
Correct Answer: sorting
Correct Answer: precoat
Correct Answer: terminal velocities
Correct Answer: both (a) & (b).
Correct Answer: Cobalt oxide
Correct Answer: consumes more power.
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