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Civil Engineering :: Building Materials

  1. The coefficient of hardness of stones used in road work should be greater than

  2. A.

     10

    B.

     12

    C.

     15

    D.

     17

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  3. The normal consistency of ordinary Portland cement is about

  4. A.

     10 %

    B.

     20 %

    C.

     30 %

    D.

     40 %

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  5. The rock generally used for roofing, is

  6. A.

     Granite

    B.

     Basalt

    C.

     Slate

    D.

     Pumice

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  7. To retard the initial setting time of cement, the compound responsible, is

  8. A.

     Tri-calcium silicate

    B.

     Gypsum

    C.

     Di-calcium silicate

    D.

     Tri-calcium aluminate

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  9. Distemper is

  10. A.

     A paint consisting of powdered chalk, pigments and water

    B.

     A water proofing agent

    C.

     A paint consisting of colored cement and water

    D.

     A drying agent

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  11. Duco paints are

  12. A.

     Plastic paints

    B.

     Cellulose paints

    C.

     Emulsion paints

    D.

     Oil paints

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  13. During pudding

  14. A.

     Molten metal is kept clear of the fuel

    B.

     Carbon is converted into carbonic acid gas

    C.

     Silicon forms a slag

    D.

     All the above

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  15. With increase in moisture content, the bulking of sand

  16. A.

     Increases

    B.

     Decreases

    C.

     First increases to a certain maximum value and then decreases

    D.

     First decreases to a certain minimum value and then increases

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  17. Paints with white lead base are suitable for painting of

  18. A.

     Wood work

    B.

     Iron work

    C.

     Both wood work and iron work

    D.

     None of the above

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  19. The hardest rock is

  20. A.

     Marble

    B.

     Diamond

    C.

     Talc

    D.

     Quartz

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