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Home Chemical Engineering Refractory Technology See What Others Are Saying!
  • Question
  • Carbon refractories have very high


  • Options
  • A. wetting characteristics
  • B. refractoriness
  • C. thermal conductivity
  • D. both (b) and (c)

  • Correct Answer
  • both (b) and (c) 


  • More questions

    • 1. Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)

    • Options
    • A. 0.5 D
    • B. D
    • C. 1.5 D
    • D. 2 D
    • Discuss
    • 2. Naphthenic acid is represented by

    • Options
    • A. CnH2n+2O2
    • B. CnH2n-2O2
    • C. CnH2n+2O2 (n ? 6)
    • D. CnH2n+6O2 (n ? 6)
    • Discuss
    • 3. Naphtha yield in straight run distillation of crude oil may be about __________ percent.

    • Options
    • A. 2
    • B. 6
    • C. 12
    • D. 18
    • Discuss
    • 4. Perspex can be used as a substitute of glass. Its monomer is

    • Options
    • A. methyl methacrylate
    • B. DMT
    • C. butadiene
    • D. tetrafluroethylene
    • Discuss
    • 5. Value of Peclet number = 0, is the representative of

    • Options
    • A. laminar flow.
    • B. complete back mixing.
    • C. plug flow.
    • D. eddy diffusivity = 0.
    • Discuss
    • 6. Hydrocracking employs

    • Options
    • A. high pressure & temperature.
    • B. low pressure & temperature.
    • C. high pressure and low temperature.
    • D. high temperature and low pressure.
    • Discuss
    • 7. Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.

    • Options
    • A. solid
    • B. liquid
    • C. combination of solid & liquid
    • D. neither solid nor liquid
    • Discuss
    • 8. Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but

    • Options
    • A. polyacrylonitrile
    • B. polyamide
    • C. saturated polyester
    • D. alkyd resin
    • Discuss
    • 9. The organic acid monomer in nylon 66 is

    • Options
    • A. sebasic acid
    • B. terephthalic acid
    • C. adipic acid
    • D. benzoic acid
    • Discuss
    • 10. In the context of the chemical process industries, the term BOD is normally associated with the

    • Options
    • A. characterisation of solid wastes.
    • B. organic concentration in gaseous effluents.
    • C. characterisation of liquid effluents.
    • D. characterisation of boiler feed water.
    • Discuss


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