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Civil Engineering :: Building Materials

  1. Addition of pozzolana to ordinary Portland cement increases

  2. A.

     Bleeding

    B.

     Shrinkage

    C.

     Permeability

    D.

     Heat of hydration


  3. As per IS specifications, the maximum final setting time for ordinary Portland cement should be

  4. A.

     30 minutes

    B.

     1 hour

    C.

     6 hours

    D.

     10 hours


  5. Which of the following has more fire resisting characteristics?

  6. A.

     Marble

    B.

     Lime stone

    C.

     Compact sand stone

    D.

     Granite


  7. Which of the following metamorphic rocks has the most weather resisting characteristics?

  8. A.

     Marble

    B.

     Quartzite

    C.

     Slate

    D.

     Lime stone


  9. The proportions of lime and sand in the mortar normally used in brick construction are

  10. A.

     1 : 2

    B.

     1 : 4

    C.

     1 : 6

    D.

     1 : 8


  11. Stainless steel resists corrosion due to

  12. A.

     Carbon

    B.

     Sulphur

    C.

     Vanadium

    D.

     Chromium


  13. Chlorite, a green colour mineral is mainly derived from the decomposition of

  14. A.

     Augite

    B.

     Biotite

    C.

     Hornblende

    D.

     All of these


  15. Excess of silica in brick earth results in

  16. A.

     cracking and warping of bricks

    B.

     loss of cohesion

    C.

     enhancing the impermeability of bricks

    D.

     none of the above


  17. Bitumen felt is used for

  18. A.

     Water proofing

    B.

     Damp proofing

    C.

     Both (A) and (B)

    D.

     Neither (A) nor (B)


  19. A ferrous metal is

  20. A.

     Cast iron

    B.

     Wrought iron

    C.

     Steel

    D.

     All the above