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Building Materials - section-9
  1. Le-Chatelier's device is used for determining the

    2. A.

     Setting time of cement
    B.

     Soundness of cement
    C.

     Tensile strength of cement
    D.

     Compressive strength of cement

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  2. According to IS 399-1963, the weight of the timber is specified at

    3. A.

     8% moisture content
    B.

     10% moisture content
    C.

     12% moisture content
    D.

     14% moisture content

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  3. Spirit varnish generally consists of

    4. A.

     Oil, wax and resin
    B.

     Alcohol, wax and turpentine
    C.

     Pigment and synthetic resin
    D.

     Spirit and shellac

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  4. Oil varnish generally consists of

    5. A.

     Synthetic resin and spirit
    B.

     Oil, wax and resin
    C.

     Resin, oil and turpentine
    D.

     Spirit, oil and wax

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  5. Plastics are compounds of carbon with element

    6. A.

     Hydrogen
    B.

     Nitrogen
    C.

     Oxygen
    D.

     All of these

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  6. The most commonly used retarder in cement is

    7. A.

     Gypsum
    B.

     Calcium chloride
    C.

     Calcium carbonate
    D.

     None of the above

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  7. The cement becomes unsound by the presence of excess

    8. A.

     Sulphur
    B.

     Magnesia
    C.

     Lime
    D.

     All of these

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  8. Resins are

    9. A.

     Not soluble in water
    B.

     Soluble in spirit
    C.

     Used in varnishes
    D.

     Left behind on evaporation of oil

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  9. Which of the following ingredients of the brick earth enables the brick to retain its shape?

    10. A.

     Alumina
    B.

     Silica
    C.

     Iron
    D.

     Magnesia

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  10. Strength of cement concrete primarily depends upon

    11. A.

     Quality of water
    B.

     Quantity of aggregate
    C.

     Quantity of cement
    D.

     Water-cement ratio

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