logo

CuriousTab

CuriousTab

Discussion

Home ‣ Biochemical Engineering ‣ Fermentation Reactors See What Others Are Saying!
  • Question

  • In a glucose-yeast extract medium, Lactococcus lactis has a maximum specific growth rate (um) of 1.23 h-1. What would be the specific growth rate of this organism at steady state in a 4 litre reactor being fed at 2 litres per hour?


  • Options
  • A. 0.5 h-1
  • B. 1.2 h-1
  • C. 2.4 h-1
  • D. 4 h-1

  • Correct Answer
  • 0.5 h-1 

    • More questions

    • 1. For glucose isomerization by immobilized enzyme, the reactor generally used is

    • Options
    • A. CSTR
    • B. plug flow
    • C. packed bed
    • D. fluidized bed
      • Discuss
    • 2. If the viscosity of a fluid decreases with the length of time that it is being mixed, then this fluid is

    • Options
    • A. newtonian
    • B. rheopectic
    • C. viscoelastic
    • D. thixotropic
      • Discuss
    • 3. The SI unit for viscosity is

    • Options
    • A. kg.m-1.s-1
    • B. kg.m-2.s-2
    • C. kg.m-3.s-1
    • D. kg.m-1.s-2
      • Discuss
    • 4. The support material for immobilization of cells of Bacillus subtilis is

    • Options
    • A. ion exchange resins
    • B. gelatin
    • C. Anthracite
    • D. agarose and carbodiimide
      • Discuss
    • 5. If biomass yields are constant, then the biomass productivity of a culture grown in continuous reactor will

    • Options
    • A. always decrease with dilution rate
    • B. increase with dilution rate until washout
    • C. remain constant irrespective of the dilution rate
    • D. decrease with dilution rate until washout
      • Discuss
    • 6. Pluronic F68 is added to cell culture media as

    • Options
    • A. a nutrient
    • B. a shear protectorant
    • C. to increase oxygen transfer rates
    • D. all of these
      • Discuss
    • 7. The increased air flow rate in bubble column fermenter can cause excessive foaming and high retention of air bubbles in the column which

    • Options
    • A. decreases the productivity of the fermenter
    • B. increases the productivity of the fermenter
    • C. modestly increases the productivity of the fermenter
    • D. does not affect on the productivity
      • Discuss
    • 8. The cellular productivity in a continuous stirred tank fermenter (CSTF) increases with an increase in the dilution rate and reaches a maximum value. If the dilution rate is increased beyond the maximum point, the productivity will

    • Options
    • A. decrease abruptly
    • B. increase
    • C. increase drastically
    • D. be zero
      • Discuss
    • 9. Sanitizers used for rubber made equipments are

    • Options
    • A. strong acids
    • B. strong alkalis
    • C. combination of both
    • D. none of these
      • Discuss
    • 10. The viscosity of water at STP is approximately

    • Options
    • A. 0.005 kg.m-1.s-1
    • B. 0.001 kg.m-1.s-1
    • C. 0.003 kg.m-2.s-1
    • D. 0.1 g.cm-1.s-1
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.