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  • Question
  • The compound of Portland cement which reacts immediately with water and also sets first is


  • Options
  • A. Tri-calcium silicate
  • B. Di-calcium silicate
  • C. Tri-calcium aluminate
  • D. Tetra calcium alumino ferrite.

  • Correct Answer
  • Tri-calcium aluminate 


  • Building Materials problems


    Search Results


    • 1. Pick up the correct statement from the following:

    • Options
    • A. Horn blende mineral is brittle
    • B. Muscovite is also known as white mica and potashmica
    • C. Biotite is also known as blackmica
    • D. All the above.
    • Discuss
    • 2. The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner, are known as

    • Options
    • A. knots
    • B. rindgalls
    • C. burls
    • D. none of these.
    • Discuss
    • 3. The specific gravity of marble, is

    • Options
    • A. 2.50
    • B. 2.60
    • C. 2.66
    • D. 2.72
    • E. 3.00.
    • Discuss
    • 4. Oil varnish generally consists of

    • Options
    • A. synthetic resin and spirit
    • B. oil, wax and resin
    • C. resin, oil and turpentine
    • D. spirit, oil and wax.
    • Discuss
    • 5. Pick up the correct statement from the following:

    • Options
    • A. Lime is available in free state
    • B. Lime is available by dissolving calcium carbonate in water
    • C. Lime is available by calcining calcium carbonate at 900°C
    • D. Lime is nothing but calcium chloride
    • E. None of these.
    • Discuss
    • 6. For a good building stone, its specific gravity should the greater than

    • Options
    • A. 1.5
    • B. 1.7
    • C. 2.2
    • D. 2.7.
    • Discuss
    • 7. Permanent magnets are made of high carbon steel and

    • Options
    • A. 15% of cobalt
    • B. 20% of cobalt
    • C. 35% of cobalt
    • D. 45% of cobalt.
    • Discuss
    • 8. The usual percentages of clay and metal in cermet are :

    • Options
    • A. 50%, 50%
    • B. 60%, 40%
    • C. 70%, 30%
    • D. 80%, 20%.
    • Discuss
    • 9. Pick up the synthetic resin from the following:

    • Options
    • A. Malamine resin
    • B. Phenolic resin
    • C. Resorcinol resin
    • D. Urea resin
    • E. All of these.
    • Discuss
    • 10. Sea sand used in structures causes

    • Options
    • A. dampness
    • B. efflorescence
    • C. disintegration
    • D. All of these.
    • Discuss


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