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Civil Engineering :: Building Materials

  1.  

    Asbestos cement

  2. A.

    is brittle

    B.

    warps due to changes in humidity

    C.

    strength is lowered when saturated by water

    D.

    all the above.

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  3. Gniess is obtained from

  4. A.

    igneous rocks

    B.

    metamorphic rocks

    C.

    sedimentary rocks

    D.

    sedimentary metamorphic rocks.

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  5. The rocks formed by gradual deposition, are called

  6. A.

    sedimentary rocks

    B.

    igneous rocks

    C.

    metamorphic rocks

    D.

    none of these.

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  7.  

    Galvanising means covering iron with a thin coat of

  8. A.

    tin

    B.

    zinc

    C.

    glaze

    D.

    coal tar.

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  9. For preparing porcelains, the clay should be

  10. A.

    sufficiently pure

    B.

    of high degree of tanacity

    C.

    of good plasticity

    D.

    All the above.

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  11. Polymerization helps to improve the property of

  12. A.

    strength

    B.

    rigidity

    C.

    elasticity

    D.

    all of these.

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  13. Good quality stones must

  14. A.

    be durable

    B.

    be free from clay

    C.

    resist action of acids

    D.

    all the above.

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  15. Sewer pipes are made of

  16. A.

    earthen ware

    B.

    stone ware

    C.

    refractory clay

    D.

    terracota

    E.

    all the above.

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  17. Fibre glass

  18. A.

    retains heat-longer

    B.
    has a higher strength to weight ratio
    C.

    is shock proof and fire retardent

    D.

    does not decay

    E.

    all the above.

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  19. Pick up the correct statement from the following:

  20. A.

    The theory of formation of concrete is based on the phenomena of formation of voids

    B.

    The bulking of sand is taken into account while volumetric proportioning of the aggregates

    C.

    The dry sand and the sand completely flooded with water, have practically the same volume

    D.

    The expansion and contraction joints are provided if concrete structures exceed 12 m in length

    E.

    All the above.

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