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Civil Engineering :: Building Materials

  1. Based on its dry weight, a freshly felled tree may contain water

  2. A.

     25 %

    B.

     50 %

    C.

     75 %

    D.

     100 %


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

  4. A.

     Red lead

    B.

     Zinc white

    C.

     White lead

    D.

     Titanium white


  5. Slacking of lime is affected by

  6. A.

     Keeping it exposed to air

    B.

     Immersing the lime in water

    C.

     Crushing the lime lumps

    D.

     None of these


  7. Hydraulic lime is obtained by

  8. A.

     Burning of lime stone

    B.

     Burning of kankar

    C.

     Adding water to quick lime

    D.

     Calcination of pure clay


  9. Lime stone is not a

  10. A.

     Sedimentary rock

    B.

     Stratified rock

    C.

     Aqueous rock

    D.

     Metamorphic rock


  11. Soundness of cement is tested by

  12. A.

     Vicat's apparatus

    B.

     Le-chatelier apparatus

    C.

     Compressive strength testing apparatus

    D.

     None of these


  13. For sanitary pipes and chemical stonewares,

  14. A.

     Salt glazing is used

    B.

     Lead glazing is used

    C.

     Opaque glazing is used

    D.

     None of these


  15. Slate is formed by metamorphic action on

  16. A.

     Shale

    B.

     Lime stone

    C.

     Sand stone

    D.

     Granite


  17. The thermosetting plastic

  18. 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


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

  20. A.

     2.2 kg

    B.

     1.5 kg

    C.

     3.2 kg

    D.

     None of these