logo

CuriousTab

CuriousTab

Discussion

Home ‣ Chemical Engineering ‣ Mechanical Operations Comments
  • Question

  • Which of the following gives the crushing energy required to create new surface?


  • Options
  • A. Taggarts rule
  • B. Fick's law
  • C. Rittinger's law
  • D. none of these

  • Correct Answer
  • Rittinger's law 

    • Mechanical Operations problems

    Search Results

    • 1. General mechanism of size reduction in intermediate and fine grinder is by

    • Options
    • A. cutting action.
    • B. compression.
    • C. compression and tearing.
    • D. impact and attrition.
      • Discuss
    • 2. Which of the following equations is Rittinger's crushing law? (where P = power required by the machine, m = feed rate, k = a constant = volume surface mean diameter of feed & product respectively.)

    • Options
    • A. P/m = K/Dp
    • B. P/m = K . ln
    • C. P/m = K .
    • D. none of these.
      • Discuss
    • 3. Reduction ratio of crushers is the

    • Options
    • A. ratio of feed opening to discharge opening.
    • B. ratio of discharge opening to feed opening.
    • C. determining factor for minimum dia of the feed and the product.
    • D. none of these.
      • Discuss
    • 4. Ore concentration by jigging is based on the difference in the __________ of the particles.

    • Options
    • A. specific gravities
    • B. wettability
    • C. shape
    • D. none of these
      • Discuss
    • 5. As the product becomes finer, the energy required for grinding

    • Options
    • A. decreases
    • B. increases
    • C. is same as for coarser grinding
    • D. is 1.5 times that for coarser grinding
      • Discuss
    • 6. In bag filters, filter fabrics are never made of

    • Options
    • A. metallic wire woven mesh
    • B. polyester fibres
    • C. cotton fibres
    • D. nylon fibres
      • Discuss
    • 7. Separation of isotopes is generally done using a/an __________ centrifuge.

    • Options
    • A. ultra
    • B. disk-bowl
    • C. both (a) & (b)
    • D. neither (a) nor (b)
      • Discuss
    • 8. Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid?

    • Options
    • A. Sand bed filter
    • B. Plate and frame filter press
    • C. Vacuum filter
    • D. Batch basket centrifuge.
      • Discuss
    • 9. Which of the following size reduction equipments employs mainly attrition for ultrafine grinding?

    • Options
    • A. Jet mills
    • B. Fluid energy mill
    • C. Micronizer
    • D. all (a), (b) and (c)
      • Discuss
    • 10. Which of the following grinding mills has the horizontally arranged rods as the grinding elements thereby delivering more uniform granular products with minimum fines?

    • Options
    • A. Compartment mill
    • B. Rod mill
    • C. Pebble mill
    • D. Tube mill.
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.