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Civil Engineering :: Building Materials

  1. The pigment used in paints for corrosive resistance, is

  2. A.

    white lead

    B.

    ferrous oxide

    C.

    zinc white

    D.

    red lead

    E.

    gypsum.

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  3. A well seasoned timber may contain moisture up to

  4. A.

    4 to 6%

    B.

    6 to 8%

    C.

    8 to 10%

    D.
    10 to 12%.

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  5. The stones obtained by blasting are used as

  6. A.

    ballast in railways

    B.

    aggregates for concrete

    C.

    roadmetal

    D.

    All the above.

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  7. Distemper is

  8. A.

    a paint consisting of powdered chalk, pigments, and water

    B.

    a water proofing agent

    C.

    a paint consisting of coloured cement and water

    D.

    a drying agent.

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  9. Oil varnish generally consists of

  10. A.

    synthetic resin and spirit

    B.

    oil, wax and resin

    C.

    resin, oil and turpentine

    D.

    spirit, oil and wax.

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  11. Pick up the correct statement from the following:

  12. A.

    The average crushing strength of hand moulded bricks is 6000 t/m2

    B.

    The average tensile strength of hand moulded brick is 200 t/m2

    C.

    The average shearing strength of hand moulded brick is 600 t/m2

    D.
    All the above.

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  13. The cracks which extend from bark towards the sap wood in the cross section of a tree, are called

  14. A.

    radial shakes

    B.

    star shakes

    C.

    heart shakes

    D.

    cup shakes.

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  15. Sea sand used in structures causes

  16. A.

    dampness

    B.

    efflorescence

    C.

    efflorescence

    D.

    All of these.

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  17. The compound of Portland cement which reacts immediately with water and also sets first is

  18. A.

    Tri-calcium silicate

    B.

    Di-calcium silicate

    C.

    Tri-calcium aluminate

    D.

    Tetra calcium alumino ferrite.

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  19. Refractory bricks resist

  20. A.

    high temperature

    B.

    chemical action

    C.
    dampness
    D.

    all the above.

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