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  • Question

  • Pasteurisation of milk means


  • Options
  • A. removal of fatty and albuminous substance from it.
  • B. killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
  • C. inhibiting the growth of micro-organisms without killing them.
  • D. none of these.

  • Correct Answer
  • killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics. 

    • Chemical Process problems

    Search Results

    • 1. Claude process of gas liquefaction employs

    • Options
    • A. merely compression of gas beyond its critical pressure.
    • B. Joule-Thomson expansion cooling.
    • C. heat exchange with colder stream.
    • D. adiabatic expansion against a piston or in a turbine.
      • Discuss
    • 2. Polycaprolactum is commercially known as

    • Options
    • A. nylon-6
    • B. nylon-66
    • C. dacron
    • D. rayon
      • Discuss
    • 3. Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of

    • Options
    • A. callagen
    • B. tannin
    • C. molasses
    • D. carbohydrate
      • Discuss
    • 4. Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

    • Options
    • A. poor oxidation stability and high gum forming tendency.
    • B. greater tendency of decomposition at elevated temperature.
    • C. hydrolysis tendency in presence of water.
    • D. all (a), (b) and (c).
      • Discuss
    • 5. Raw materials used for producing __________ cement does not contain iron oxide.

    • Options
    • A. waterproof
    • B. slag
    • C. white
    • D. pozzolan
      • Discuss
    • 6. Esterification reaction

    • Options
    • A. produces soap.
    • B. is reversible.
    • C. is a reaction between an alcohol and an organic acid.
    • D. all (a), (b) and (c).
      • Discuss
    • 7. Thermal conductivity measurement com-prises the working principle of a

    • Options
    • A. CO2 analyser
    • B. polarimeter
    • C. spectrometer
    • D. chromatograph
      • Discuss
    • 8. Which of the following is the dynamic characteristics of an instrument?

    • Options
    • A. Reproducibility
    • B. Sensitivity
    • C. Dead zone
    • D. Fidelity
      • Discuss
    • 9. The second order system with the transfer function has a damping ratio of

    • Options
    • A. 2.0
    • B. 0.5
    • C. 1.0
    • D. 4.0
      • Discuss
    • 10. Response of a system to a sinusoidal input is called __________ response.

    • Options
    • A. impluse
    • B. unit step
    • C. frequency
    • D. none of these
      • Discuss

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