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Civil Engineering :: Building Materials

  1. For preparing porcelains, the clay should be

  2. A.

     Sufficiently pure

    B.

     Of high degree of tenacity

    C.

     Of good plasticity

    D.

     All the above


  3. Bessemer process is used for the manufacture of

  4. A.

     Pig iron

    B.

     Cast iron

    C.

     Wrought iron

    D.

     Steel


  5. For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of

  6. A.

     1 : 2

    B.

     1 : 3

    C.

     1 : 4

    D.

     1 : 6


  7. Bullet proof glass is made of thick glass sheet sandwiched by a layer of

  8. A.

     Steel

    B.

     Stainless steel

    C.

     High test plastic

    D.

     Chromium plate


  9. Good quality cement contains higher percentage of

  10. A.

     Tri-calcium silicate

    B.

     Di-calcium silicate

    C.

     Tri-calcium aluminate

    D.

     Tetra calcium alumino ferrite


  11. The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:

  12. A.

     Radial shakes

    B.

     Heart shakes

    C.

     Wind cracks

    D.

     Twisted fibres


  13. The most commonly used synthetic abrasive is

  14. A.

     Aluminium carbide

    B.

     Boric acid

    C.

     Silicon

    D.

     All of these


  15. The main constituent which imparts hydraulicity to hydraulic lime is

  16. A.

     Calcium oxide

    B.

     Silica

    C.

     Clay

    D.

     Water


  17. Sandstone is a
    (i) Sedimentary rock
    (ii) Aqueous rock
    (iii) Siliceous rock

  18. A.

     Only (i)

    B.

     Both (i) and (ii)

    C.

     Both (i) and (iii)

    D.

     All (i), (ii) and (iii)


  19. For one cubic metre of brick masonry, number of bricks required, is

  20. A.

     400

    B.

     425

    C.

     450

    D.

     500