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  • Question
  • __________ bricks are used in the burning zone of a cement rotary kiln.


  • Options
  • A. High alumina
  • B. Fireclay
  • C. Thoria
  • D. Silicon carbide

  • Correct Answer
  • High alumina 


  • Refractory Technology problems


    Search Results


    • 1. Bauxite calcining rotary kilns are lined with __________ bricks.

    • Options
    • A. fireclay
    • B. carbon
    • C. 85% alumina
    • D. corundum
    • Discuss
    • 2. Carbon refractories

    • Options
    • A. do not burn/oxidise, when exposed to air on heating.
    • B. are not attacked by slags, as they are not wetted by melts.
    • C. do not resist temperature fluctuations.
    • D. have extremely low thermal & electrical conductivities.
    • Discuss
    • 3. Which brick undergoes maximum shrinkage on drying?

    • Options
    • A. Tar bonded dolomite bricks
    • B. Fireclay bricks
    • C. Magnesite bricks
    • D. Chromite bricks
    • Discuss
    • 4. Refractory castables are used for

    • Options
    • A. producing monolithic linings.
    • B. patch work.
    • C. minimising the number of joints in the structure.
    • D. all (a), (b) and (c).
    • Discuss
    • 5. 'Spinel', a refractory mineral is chemically represented as

    • Options
    • A. MgAl2O4
    • B. MgAl2O3
    • C. MgSO4
    • D. MgAl2O3.2H2O
    • Discuss
    • 6. Magnesite refractories have low resistance to

    • Options
    • A. attack by basic slag.
    • B. abrasion.
    • C. disintegration on sudden change of temperature.
    • D. both (b) and (c).
    • Discuss
    • 7. Hot face insulating linings of high purity alumina fused mullite are used, where

    • Options
    • A. very high temperatures are involved.
    • B. highly reducing conditions are involved.
    • C. presence of iron or silica is harmful.
    • D. all (a), (b) and (c).
    • Discuss
    • 8. Mixing of ground refractory material and water is done in a __________ mill.

    • Options
    • A. pug
    • B. ball
    • C. tube
    • D. rod
    • Discuss
    • 9. Which of the following bricks should not be used, if the furnace is to be used intermit-tantly?

    • Options
    • A. Firebricks
    • B. Silica bricks
    • C. Silicon carbide bricks
    • D. Sillimanite
    • Discuss
    • 10. The largest consumer of refractories is the __________ industry.

    • Options
    • A. cement
    • B. metallurgical
    • C. fertiliser
    • D. power
    • Discuss


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