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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.  for a Tee (used as elbow, entering run) would be around

    • Options
    • A. 5
    • B. 60
    • C. 200
    • D. 350
    • Discuss
    • 2. 200 mesh seive size corresponds to __________ microns.

    • Options
    • A. 24
    • B. 74
    • C. 154
    • D. 200
    • Discuss
    • 3. Polycaprolactum is also known as

    • Options
    • A. nylon-66
    • B. nylon-6
    • C. teflon
    • D. SBR
    • Discuss
    • 4. Carbon/hydrogen ratio (by weight) is maximum (out of following) for

    • Options
    • A. gasoline
    • B. kerosene
    • C. light gas oil
    • D. heavy fuel oil
    • Discuss
    • 5. Salt content in sea water is about __________ percent.

    • Options
    • A. 0.5
    • B. 1
    • C. 3.5
    • D. 10
    • Discuss
    • 6. Refractoriness/fusion points of 'superduty' refractories is __________ °C.

    • Options
    • A. 1520-1630
    • B. 1630-1670
    • C. > 1730
    • D. > 2000
    • Discuss
    • 7. Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds

    • Options
    • A. 4000
    • B. 2100
    • C. 1500
    • D. 3000
    • Discuss
    • 8. Plastic tubes & pipes are generally made by __________ moulding.

    • Options
    • A. injection
    • B. transfer
    • C. extrusion
    • D. compression
    • Discuss
    • 9. pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant.

    • Options
    • A. 4-5
    • B. 7-8
    • C. 9-10
    • D. 12-13
    • Discuss
    • 10. Sphericity of pulverised coal is

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


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