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  • Question
  • Overall distillation column efficiency for most of the refinery columns can be given by (for ? = 0.07 - 1.4 cp and relative volatility < 4) (where ? = overall column efficiency, % ? = molal average viscosity of feed at average column temperature and pressure, cp ?p = pressure drop per tray, psi)


  • Options
  • A. ? = 17 - 61.1 log ?
  • B. Overall distillation column efficiency for most of the refinery columns can be given by (for ? = 0.0
  • C. ? = 1.66 - 0.25 log ?
  • D. ? = 0.25 log ? - 1.67

  • Correct Answer
  • ? = 17 - 61.1 log ? 


  • More questions

    • 1. Soaking pits are meant for heating steel

    • Options
    • A. ingots
    • B. coils
    • C. sheets
    • D. slabs
    • Discuss
    • 2. Percentage of heavy water in ordinary water is around

    • Options
    • A. 0.015
    • B. 7.54
    • C. 0.71
    • D. 32.97
    • Discuss
    • 3. Density of low density polythene is about __________ gm/c.c.

    • Options
    • A. 0.38
    • B. 0.56
    • C. 0.81
    • D. 0.91
    • Discuss
    • 4. Rain coats are made of

    • Options
    • A. neoprene
    • B. PVC
    • C. polyurathane
    • D. SBR
    • Discuss
    • 5. CaCO3 contains __________ percent of Ca by weight.

    • Options
    • A. 40
    • B. 48
    • C. 96
    • D. 12
    • Discuss
    • 6. Pick out the material having minimum Rittinger's number.

    • Options
    • A. Calcite
    • B. Pyrite
    • C. Quartz
    • D. Galena
    • Discuss
    • 7. Average molecular weight of air is about

    • Options
    • A. 21
    • B. 29
    • C. 23
    • D. 79
    • Discuss
    • 8. Both tritium and deuterium have the same number of

    • Options
    • A. neutrons
    • B. electrons
    • C. protons
    • D. nucleons
    • Discuss
    • 9. °API gravity of water at N.T.P. is about

    • Options
    • A. 0
    • B. 1
    • C. 10
    • D. 100
    • Discuss
    • 10. Carbon Content by weight in air dried wood may be about __________ percent.

    • Options
    • A. 10
    • B. 25
    • C. 50
    • D. 80
    • Discuss


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