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  • Question
  • Cold crushing strength of refractories depends upon its


  • Options
  • A. composition
  • B. texture
  • C. firing temperature
  • D. all (a), (b) and (c)

  • Correct Answer
  • all (a), (b) and (c) 


  • Refractory Technology problems


    Search Results


    • 1. Machine moulding of dry mixture of refractories requires a pressure of the order of __________ kg/cm2.

    • Options
    • A. 10
    • B. 100
    • C. 500
    • D. 1000
    • Discuss
    • 2. Fusion point of an acidic refractory material is

    • Options
    • A. increased by the addition of basic oxides.
    • B. reduced by the addition of basic oxides.
    • C. not affected by the addition of basic oxides.
    • D. always more than 2500°C.
    • Discuss
    • 3. Carbon refractory blocks

    • Options
    • A. are wetted by molten iron.
    • B. are used in the hearth of blast furnace.
    • C. are acidic in nature.
    • D. all (a), (b) and (c).
    • Discuss
    • 4. Periclase refractory contains mainly

    • Options
    • A. CaO
    • B. MgO
    • C. Al2O3
    • D. SiO2
    • Discuss
    • 5. High density refractory bricks have lower

    • Options
    • A. spalling resistance.
    • B. thermal conductivity.
    • C. fusion point.
    • D. slag penetration resistance.
    • Discuss
    • 6. Which refractory must have controlled atmosphere (temperature and humidity) for its safe storage?

    • Options
    • A. Tar bonded dolomite bricks
    • B. Fireclay bricks
    • C. Mullite bricks
    • D. Magnesite bricks
    • Discuss
    • 7. Which is a basic refractory?

    • Options
    • A. Fireclay
    • B. Silica
    • C. Chrome magnesite
    • D. None of these
    • Discuss
    • 8. Silicon carbide refractories are used in the

    • Options
    • A. muffle furnace
    • B. zinc smelting furnace
    • C. ceramic recuperators
    • D. all (a), (b) and (c)
    • Discuss
    • 9. Which is not a high alumina refractory?

    • Options
    • A. Mullite
    • B. Corrundum
    • C. Bauxite
    • D. Dolomite
    • Discuss
    • 10. Ramming masses are used for

    • Options
    • A. obtaining monolithic working faces.
    • B. repairing construction of various furnace parts.
    • C. both (a) & (b).
    • D. neither (a) nor (b).
    • Discuss


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