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Civil Engineering :: Building Materials

  1. French polish is

  2. A.

     Oil paint

    B.

     Distemper

    C.

     Spirit varnish

    D.

     None to these


  3. If the iron ore contains clay as an impurity, the flux added during calcination, is

  4. A.

     Clay

    B.

     Lime stone

    C.

     Argillaceous iron ore

    D.

     All the above


  5. Rapid hardening cement contains

  6. A.

     Tri-calcium silicate

    B.

     Tri-calcium aluminate

    C.

     Tetra-calcium alumino-ferrite

    D.

     Di-calcium silicate


  7. The amount of water used for one kg of distemper is

  8. A.

     0.2 liter

    B.

     0.4 liter

    C.

     0.6 liter

    D.

     0.8 liter


  9. Granite is not suitable for ordinary building purpose because

  10. A.

     it can not be polished

    B.

     it is not a fire proof material

    C.

     it is costly

    D.

     it has less crushing strength


  11. The frog of the brick in a brick masonry is generally kept on

  12. A.

     Bottom face

    B.

     Top face

    C.

     Shorter side

    D.

     Longer side


  13. Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth?

  14. A.

     Lime stone and alumina

    B.

     Silica and alkalies

    C.

     Alumina and iron

    D.

     Alkalies and magnesium


  15. Gypsum is a

  16. A.

     Mechanically formed sedimentary rock

    B.

     Igneous rock

    C.

     Chemically precipitated sedimentary rock

    D.

     Metamorphic rock


  17. Excess of alumina in brick earth makes the brick

  18. A.

     Impermeable

    B.

     Brittle and weak

    C.

     To lose cohesion

    D.

     To crack and warp on drying


  19. A good brick earth should contain:

  20. A.

     About 20% to 30% of alumina

    B.

     About 50% to 60% of silica

    C.

     Not more than 5% of lime

    D.

     All the above