logo

CuriousTab

CuriousTab

Discussion


Home Chemical Engineering Mechanical Operations Comments

  • Question
  • With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge


  • Options
  • A. increases
  • B. decreases
  • C. remains constant
  • D. increases linearly

  • Correct Answer
  • increases 


  • Mechanical Operations problems


    Search Results


    • 1. Sphericity of raschig ring (whose length and diameter are equal) is

    • Options
    • A. >1
    • B. <1
    • C. 1
    • D. 2
    • Discuss
    • 2. 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?

    • Options
    • 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 grindng of large particles in un-baffed mills.
    • Discuss
    • 3. During filtration operation, the filtrate encounters the resistance of the

    • Options
    • A. filter medium.
    • B. cake.
    • C. channel carrying the slurry to the upstream side of the cake and filtrate away from the filter medium.
    • D. all (a), (b) and (c)
    • Discuss
    • 4. The filtrate flow rate in constant pressure filtration

    • Options
    • A. continuously increases.
    • B. continuously decreases.
    • C. remains constant throughout.
    • D. may increase or decrease ; depends on the pressure.
    • Discuss
    • 5. Pick out the wrong statement.

    • Options
    • A. Hammer crushers operate by impact action.
    • B. Standard screens have circular opening.
    • C. With increase in mesh number of screens, their diameter in microns decreases.
    • D. 200 mesh screen has 200 openings per linear cm.
    • Discuss
    • 6. Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is __________ microns.

    • Options
    • A. < 5
    • B. 10 to 25
    • C. < 74
    • D. > 1000
    • Discuss
    • 7. The most efficient equipment for the removal of sub-micronic dust particles from blast furnace gas is the

    • Options
    • A. venturi atomiser
    • B. gravity settling chamber
    • C. electro-static precipitator
    • D. cyclone separator
    • Discuss
    • 8. Xanthates are used in the froth floatation process as a/an

    • Options
    • A. conditioner
    • B. frother
    • C. collector
    • D. activator
    • Discuss
    • 9. A filter press is

    • Options
    • A. a batch filter.
    • B. not suitable, if the liquid is the main product.
    • C. having prohibitively high maintenance cost.
    • D. not suitable for wide range of materials under varying operating conditions of cake thickness and pressure.
    • Discuss
    • 10. The capacity of a gyratory crusher is __________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.

    • Options
    • A. same as
    • B. 2.5 times
    • C. 5 times
    • D. 10 times
    • Discuss


    Comments

    There are no comments.

Enter a new Comment