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Civil Engineering :: Building Materials

Building Materials - Section 1
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Building Materials - Section 5
Building Materials - Section 6
Building Materials - Section 7
Building Materials - Section 8
Building Materials - section-9

  1. Wrought iron contains carbon about

    2. A.

    1.5% to 5.5%
    B.

    0.5% to 1.75%
    C.

    0.1% to 0.25%
    D.

    none to these.

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  2. The main constituent of fly-ash, is

    3. A.

    aluminium oxide
    B.

    silica
    C.

    ferrous oxide
    D.

    All of these.

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  3. Bitumen in

    4. A.

    solid state, is called asphalt
    B.

    semi fluid state, is called mineral tar
    C.

    fluid state, is called petroleum
    D.

    all the above.

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  4. If θ is the vertical angle of an inclined sight, δ is the angle of tilt of the staff, the error

    5. A.

    B.

    C.

    D.

    none of these.

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  5. The plastics made from cellulose resin
    6. A.

    are as clear as glass
    B.

    are tough and strong
    C.

    possess excellent electrical properties
    D.

    All the above.

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  6. Kaolin is chemically classified as

    7. A.

    metamorphic rock
    B.

    argillaceous rock
    C.

    calcareous rock
    D.

    silicious rock.

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  7. Which one of the following is acid resistant asbestos:

    8. A.

    actinolite asbestos
    B.

    actinolite asbestos
    C.

    anthophylite asbestos
    D.

    crocidolite asbestos
    E.

    All the above.

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  8. Due to attack of dry rot, the timber
    9. A.

    cracks
    B.

    shrinks
    C.

    reduces to powder
    D.
    none of these.

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  9. Brittleness of cold is due to an excess of

    10. A.

    sulphur
    B.

    carbon
    C.

    phosphorus
    D.

    silicon.

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  10. For the manufacture of Portland cement, the proportions of raw materials used, are

    11. A.

    lime 63% ; silica 22% ; other ingredients 15%
    B.

    lime 22% ; silica 63% ; other ingredients 15%
    C.

    silica 40% ; lime 40% ; other ingredients 20%
    D.

    silica 70% ; lime 20% ; other ingredients 10%.

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