logo

CuriousTab

CuriousTab

Discussion


Home Chemical Engineering Refractory Technology Comments

  • Question
  • Periclase is


  • Options
  • A. crystalline form of MgO.
  • B. MgCO3.
  • C. ZrSO4.
  • D. amorphous magnesite.

  • Correct Answer
  • crystalline form of MgO. 


  • Refractory Technology problems


    Search Results


    • 1. Silliminite (Al2O3.SiO2) refractory, which is a neutral refractory, is not used in

    • Options
    • A. pottery furnace
    • B. glass melting furnace
    • C. crucibles
    • D. gas retorts
    • Discuss
    • 2. Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant?

    • Options
    • A. Soaking pits
    • B. Ceheating furnace
    • C. L.D. converter
    • D. Rotary lime kiln
    • Discuss
    • 3. Cermets are

    • Options
    • A. composite material containing both ceramic & metallic constituents.
    • B. having high strength & resistance to high temperature.
    • C. used in space vehicles, missiles & nuclear energy plants.
    • D. all (a), (b) and (c).
    • Discuss
    • 4. Which of the following does not occur during firing/burning of refractories?

    • Options
    • A. Removal of water of hydration.
    • B. Vitrification.
    • C. Decrease in crushing strength.
    • D. Development of stable mineral form.
    • Discuss
    • 5. With increasing alumina content, the fusion point of high alumina refractories

    • Options
    • A. increases.
    • B. decreases.
    • C. remains constant.
    • D. may increase or decrease ; depends on its alumina content.
    • Discuss
    • 6. Basic bricks are not made of

    • Options
    • A. fireclay
    • B. magnesite
    • C. foresterite
    • D. chromite
    • Discuss
    • 7. Chrome magnesite bricks are used in the

    • Options
    • A. side walls of soaking pits and arc furnaces.
    • B. copper melting furnaces & converters.
    • C. burner block of glass tanks.
    • D. all (a), (b) and (c)
    • Discuss
    • 8. Ferromagnetic ceramic material is not used in the

    • Options
    • A. thermal insulation
    • B. transformers
    • C. magnetic switches
    • D. television sets
    • Discuss
    • 9. Insulating refractories should have

    • Options
    • A. high porosity
    • B. low thermal conductivity
    • C. both (a) and (b)
    • D. neither (a) not (b)
    • Discuss
    • 10. Cold crushing strength of a refractory does not depend upon its

    • Options
    • A. shape
    • B. composition
    • C. firing temperature
    • D. texture
    • Discuss


    Comments

    There are no comments.

Enter a new Comment