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Home Biochemical Engineering Fluid Flow See What Others Are Saying!
  • Question
  • A fluid in which the viscosity decreases with increasing stirrer speed and mixing time, can be represented as


  • Options
  • A. newtonian fluid
  • B. pseudoplastic, thixotropic fluid
  • C. dilatant, rheopectic fluid
  • D. dilatant, pseudoplastic fluid

  • Correct Answer
  • pseudoplastic, thixotropic fluid 


  • More questions

    • 1. In the death phase

    • Options
    • A. nutrients available for the cells are depleted and begin to die
    • B. the number of viable cells will increase
    • C. nutrients available for cells are replenished and start to multiply
    • D. none of the above
    • Discuss
    • 2. Which of the following is correct?

    • Options
    • A. The viscosity of liquids and gases decrease with increasing temperature
    • B. The viscosity of liquids and gases increase with increasing temperature
    • C. the viscosity of gases increases with increasing temperature, but decreases in liquids
    • D. the viscosity of gases decreases with increasing temperature, but decreases in liquids.
    • Discuss
    • 3. Soya off flavour removal may be achieved using

    • Options
    • A. di acetyl reductase
    • B. ?- amylase
    • C. aldehyde oxidase
    • D. protease
    • Discuss
    • 4. Temporary hardness of water may be removed by adding

    • Options
    • A. calcium hydroxide
    • B. calcium carbonate
    • C. calcium chloride
    • D. sodium bicarbonate
    • Discuss
    • 5. Liquefaction of starch to dextrin is carried out by

    • Options
    • A. ?-amylase
    • B. cellulase
    • C. pectinase
    • D. all of these
    • Discuss
    • 6. Which of the following is considered as a pretreatment to the biological feeds?

    • Options
    • A. Heating to denature the proteins
    • B. Addition of filter aids to increase the porosity
    • C. Addition of electrolytes
    • D. All of the above
    • Discuss
    • 7. Filtration leaf test results indicate that the filtration rate of a protein product is 100 dry lbs/(ft2 hr). What size production filter would be required to obtain 100 dry lbs of filter cake/hr?

    • Options
    • A. 1.54 ft2
    • B. 3.08 ft2
    • C. 65 ft2
    • D. 65 lbs/ ft2.hr
    • Discuss
    • 8. For the turbulent flow, the dispersion coefficient is correlated as a function of

    • Options
    • A. Reynolds number
    • B. Sherwood number
    • C. Schmidt number
    • D. Grashof number
    • Discuss
    • 9. The common methods used for disinfection in waste water treatment plants are

    • Options
    • A. chlorination
    • B. UV light
    • C. both (a) and (b)
    • D. Phenolic solvent
    • Discuss
    • 10. The mechanism of air filtration in fibrous filter is

    • Options
    • A. electrostatic attraction
    • B. impaction
    • C. interception
    • D. all of these
    • Discuss


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