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Building Materials - section-9
  1. Based on its dry weight, a freshly felled tree may contain water

    2. A.

     25 %
    B.

     50 %
    C.

     75 %
    D.

     100 %

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  2. The most commonly used base for timber painting, is

    3. A.

     Red lead
    B.

     Zinc white
    C.

     White lead
    D.

     Titanium white

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  3. Slacking of lime is affected by

    4. A.

     Keeping it exposed to air
    B.

     Immersing the lime in water
    C.

     Crushing the lime lumps
    D.

     None of these

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  4. Hydraulic lime is obtained by

    5. A.

     Burning of lime stone
    B.

     Burning of kankar
    C.

     Adding water to quick lime
    D.

     Calcination of pure clay

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  5. Lime stone is not a

    6. A.

     Sedimentary rock
    B.

     Stratified rock
    C.

     Aqueous rock
    D.

     Metamorphic rock

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  6. Soundness of cement is tested by

    7. A.

     Vicat's apparatus
    B.

     Le-chatelier apparatus
    C.

     Compressive strength testing apparatus
    D.

     None of these

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  7. For sanitary pipes and chemical stonewares,

    8. A.

     Salt glazing is used
    B.

     Lead glazing is used
    C.

     Opaque glazing is used
    D.

     None of these

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  8. Slate is formed by metamorphic action on

    9. A.

     Shale
    B.

     Lime stone
    C.

     Sand stone
    D.

     Granite

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  9. The thermosetting plastic

    10. A.

     Becomes rigid when moulded at suitable pressure and temperature
    B.

     At 127°C to 177°C permanently set and further application of heat does not soften it
    C.

     Chars at 343°C
    D.

     All the above

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  10. For slaking of 10 kg of CaO, the theoretical amount of water is

    11. A.

     2.2 kg
    B.

     1.5 kg
    C.

     3.2 kg
    D.

     None of these

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