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- Question
Crushing of mineral particles is accomplished in a 'cage mill', when one or more alloy steel bars are revolved in opposite directions. It is a type of __________ mill.
Options- A. impact
- B. roll
- C. vibratory
- D. none of these
- Correct Answer
- impact
- 1. Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is
Options- A. 0.01 to 0.1
- B. 0.1 to 0.3
- C. 0.2 to 0.8
- D. 0.2 to 0.4 Discuss
- 2. The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the __________ of the belt.
Options- A. speed
- B. thickness
- C. length
- D. none of these Discuss
- 3. Solid particles separation based on the difference in their flow velocities through fluids is termed as the
Options- A. clarification
- B. classification
- C. elutriation
- D. sedimentation Discuss
- 4. Pick out the wrong statement.
Options- A. Recycled coarse material to the grinder by a classifier is termed as circulating load.
- B. Wear and tear in wet crushing is more than that in dry crushing of materials.
- C. Size enlargement (opposite of size reduction) is not a mechanical operation.
- D. A 'dust catcher' is simply an enlargement in a pipeline which permits the solids to settle down due to reduction in velocity of the dust laden gas. Discuss
- 5. If a force greater than that of gravity is used to separate solids & fluids of different densities, the process is termed as the
Options- A. sedimentation
- B. flocculation
- C. dispersion
- D. centrifugation Discuss
- 6. Sulphuric acid mist is arrested by using a __________ scrubber.
Options- A. packed wet
- B. hollow wet
- C. venturi
- D. co-current Discuss
- 7. __________ is the most commonly used 'filter aid'.
Options- A. Diatomaceous earth
- B. Fuller's earth
- C. Vermiculite
- D. Semi-plastic clay Discuss
- 8. Which of the following is not a part of the Blake jaw crusher?
Options- A. Hanger
- B. Check plates
- C. Toggles
- D. Pitman Discuss
- 9. Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills.
Options- A. metalliferrous ores
- B. non-metallic ores
- C. basic slags
- D. asbestos & mica Discuss
- 10. Which of the following is the most suitable for cleaning of fine coal dust (<0.5 mm)?
Options- A. Trough washer
- B. Baum jig washer
- C. Spiral separator
- D. Froth floatation Discuss
Mechanical Operations problems
Search Results
Correct Answer: 0.2 to 0.8
Correct Answer: speed
Correct Answer: classification
Correct Answer: Size enlargement (opposite of size reduction) is not a mechanical operation.
Correct Answer: centrifugation
Correct Answer: venturi
Correct Answer: Diatomaceous earth
Correct Answer: Hanger
Correct Answer: metalliferrous ores
Correct Answer: Froth floatation
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