logo

CuriousTab

CuriousTab

Discussion

Home ‣ Chemical Engineering ‣ Refractory Technology Comments
  • Question

  • Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm2 ) is __________ °C.


  • Options
  • A. 500
  • B. 1000
  • C. >1350
  • D. >2000

  • Correct Answer
  • >1350 

    • Refractory Technology problems

    Search Results

    • 1. Carbon refractories are exclusively used in the

    • Options
    • A. hearth of blast furnace.
    • B. walls of coke oven.
    • C. regenerators of coke oven.
    • D. side wall of soaking pits.
      • Discuss
    • 2. Porosity of silica bricks varies from __________ percent.

    • Options
    • A. 5 to 10
    • B. 20 to 30
    • C. 45 to 60
    • D. 60 to 75
      • Discuss
    • 3. Magnesite bricks have poor resistance to attack by __________ slag.

    • Options
    • A. lime
    • B. basic
    • C. acid
    • D. none of these
      • Discuss
    • 4. __________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold.

    • Options
    • A. High thermal conductivity
    • B. Low porosity
    • C. Non-wetting characteristics
    • D. High density
      • Discuss
    • 5. High alumina refractories are used in the

    • Options
    • A. dome of blast furnace stoves.
    • B. electric arc furnace roof.
    • C. glass melting furnaces.
    • D. all (a), (b) and (c).
      • Discuss
    • 6. Which of the following is not a high alumina refractory material?

    • Options
    • A. Kyanite
    • B. Sillimanite
    • C. Diaspore
    • D. Periclase
      • Discuss
    • 7. Porosity of fireclay refractories is __________ percent.

    • Options
    • A. 5-10
    • B. 10-25
    • C. 25-35
    • D. 35-50
      • Discuss
    • 8. Which one contains minimum percentage of SiO2?

    • Options
    • A. Firebrick
    • B. Sillimanite
    • C. Semi-silica
    • D. Aluminous firebrick
      • Discuss
    • 9. Zirconia refractories are not used in

    • Options
    • A. making sheaths for thermocouple.
    • B. lining high temperature ceramic kilns.
    • C. furnaces subjected to fluctuating temperature.
    • D. high frequency induction furnaces in the form of inductors.
      • Discuss
    • 10. With decrease in porosity, the __________ of the refractories decreases.

    • Options
    • A. strength
    • B. thermal conductivity
    • C. spalling resistance
    • D. none of these
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.