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Building Materials - section-9
  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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  2. The normal consistency of ordinary Portland cement is about

    3. A.

     10 %
    B.

     20 %
    C.

     30 %
    D.

     40 %

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  3. The rock generally used for roofing, is

    4. A.

     Granite
    B.

     Basalt
    C.

     Slate
    D.

     Pumice

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

    5. A.

     Tri-calcium silicate
    B.

     Gypsum
    C.

     Di-calcium silicate
    D.

     Tri-calcium aluminate

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  5. Distemper is

    6. 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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  6. Duco paints are

    7. A.

     Plastic paints
    B.

     Cellulose paints
    C.

     Emulsion paints
    D.

     Oil paints

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  7. During pudding

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

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

    10. A.

     Wood work
    B.

     Iron work
    C.

     Both wood work and iron work
    D.

     None of the above

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  10. The hardest rock is

    11. A.

     Marble
    B.

     Diamond
    C.

     Talc
    D.

     Quartz

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