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  • Question
  • Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripherial velocity, m/sec. W = width of rolls, m Dr = distance between rolls ? = density of material to be crushed, kg/m3 here, V =?N.D where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m)


  • Options
  • A. 3.6 V.W.Dr.?
  • B. 3.6 V.W. ?
  • C. 3.6 W.Dr.?
  • D. 3.6 V.W.Dr/?

  • Correct Answer
  • 3.6 V.W.Dr.? 


  • More questions

    • 1. Grinding efficiency of a ball mill is of the order of __________ percent.

    • Options
    • A. 1-5
    • B. 40-50
    • C. 75-80
    • D. 90-95
    • Discuss
    • 2. Poly tetra flouro ethylene (PTFE) is known as

    • Options
    • A. dacron
    • B. teflon
    • C. bakelite
    • D. celluloid
    • Discuss
    • 3. German silver used for decorative purposes contains maximum percentage of

    • Options
    • A. silver
    • B. copper
    • C. zinc
    • D. nickel
    • Discuss
    • 4. Ammonium phosphate is a __________ fertiliser.

    • Options
    • A. nitrogenous
    • B. phosphatic
    • C. complex
    • D. mixed
    • Discuss
    • 5. Radioactivity of an isotope is expressed in

    • Options
    • A. barn
    • B. MeV
    • C. Curie
    • D. Ergs
    • Discuss
    • 6. Corrosion of metals can not be prevented by its

    • Options
    • A. tempering
    • B. chromising
    • C. aluminising
    • D. alloying
    • Discuss
    • 7. The value of 'angle of nip' is generally about

    • Options
    • A. 16°
    • B. 32°
    • C. 52°
    • D. 64°
    • Discuss
    • 8. Which is a neutral refractory?

    • Options
    • A. Graphite
    • B. Magnesite chrome
    • C. Silica
    • D. Magnesia
    • Discuss
    • 9. Buna-S is also known as

    • Options
    • A. teflon
    • B. PTFE
    • C. SBR
    • D. polycrylates
    • Discuss
    • 10. Viscosity of atmospheric air may be about __________ centipoise.

    • Options
    • A. 0.015
    • B. 1.5
    • C. 15
    • D. 150
    • Discuss


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