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Building Materials - section-9
  1. The type of steel used for precision levelling staff, is

    2. A.

     Titanium steel
    B.

     Carbon steel
    C.

     Invar
    D.

     Stainless steel

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  2. Veneering means

    3. A.

     Carving out designs on timber planks
    B.

     Chemically treating timber planks
    C.

     Thick layer of superior wood glued to inferior wood
    D.

     Thin layer of superior wood glued to inferior wood

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  3. Good quality sand is never obtained from

    4. A.

     River
    B.

     Lake
    C.

     Sea
    D.

     Gravel powder

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  4. Water paint is a

    5. A.

     White wash
    B.

     Color wash
    C.

     Whiting
    D.

     All the above

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  5. A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than

    6. A.

     10 %
    B.

     15 %
    C.

     20 %
    D.

     25 %

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  6. The commonly used lime in white washing, is

    7. A.

     White lime
    B.

     Fat lime
    C.

     Hydraulic lime
    D.

     Quick lime

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  7. Plywood is made from

    8. A.

     Common timber
    B.

     Bamboo fibre
    C.

     Teak wood only
    D.

     Asbestos sheets

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  8. Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as

    9. A.

     Quick setting cement
    B.

     Rapid hardening cement
    C.

     White cement
    D.

     Low heat Portland cement

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  9. Bitumen may be dissolved in

    10. A.

     Carbondioxide
    B.

     Water
    C.

     Sodium chloride
    D.

     Carbon disulphide

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  10. The percentage of alumina and silica in good fire clay vary respectively is

    11. A.

     25, 75
    B.

     30, 70
    C.

     35, 65
    D.

     All of these

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