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Civil Engineering :: Building Materials

  1. Cast iron contains carbon approximately

  2. A.

    1.5% to 5.5%

    B.

    0.05% to 1.75%

    C.

    0.250%

    D.

    none to these.


  3. Plastic asphalt is

  4. A.

    used as a water proofing layer over roof

    B.

    a mixture of cement and asphalt

    C.

    a natural asphalt

    D.

    a refinery product.


  5. For obtaining vinyl chloride acetate, the method used, is

  6. A.

    addition polymerization

    B.
    condensation polymerization
    C.

    co-polymerization

    D.

    none of these.


  7. The yield strength and tensile strength of low carbon steel may be improved by the addition of

  8. A.

    manganese

    B.

    chromium

    C.

    nickel

    D.

    venadium

    E.

    tungsten.


  9. Bitumen completely dissolves in

  10. A.

    carbon bisulphide

    B.

    carbon bisulphide

    C.

    benzol

    D.

    coaltar

    E.

    All of these.


  11.  

    Good quality cement contains higher percentage of

  12. A.

    Tricalcium silicate

    B.

    Di-calcium silicate

    C.

    Tri-calcium aluminate

    D.

    Tetra calcium alumino ferrite

    E.

    all the above.


  13. Soundness of cement is tested by

  14. A.

    Vicat's apparatus

    B.

    Le-chatelier apparatus

    C.

    compressive strength testing apparatus

    D.

    none of the these.


  15. The PVC doors and windows are preferred as they are

  16. A.

    rust proof

    B.

    rot proof

    C.

    termile proof

    D.

    water proof

    E.

    all of these.


  17. Based on its dry weight, a freshly felled tree may contain water

  18. A.

    25%

    B.

    50%

    C.

    75%

    D.

    100%.


  19. Forge pig may be converted to wrought iron by

  20. A.

    rolling

    B.

    pudding

    C.

    shingling

    D.

    refining.