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Civil Engineering :: Building Materials

  1. The commonly used lime in white washing, is

  2. A.

    white lime

    B.

    fat lime

    C.

    hydraulic lime

    D.

    lime

    E.

    quick lime.


  3. Shingle is

  4. A.

    decomposed laterite

    B.

    crushed granite

    C.

    water bound pebbles

    D.

    air weathered rock.


  5. Pick up the plutonic rock from the following:

  6. A.

    Granite

    B.

    Dolerite

    C.

    Basalt

    D.

    All the above.


  7. The lime which contains mainly calcium oxide and slacks with water, is

  8. A.

    fat lime

    B.

    quick lime

    C.

    hydraulic lime

    D.

    poor lime

    E.

    none of these.


  9. Seasoning is

  10. A.

    a process of removing sap

    B.

    creosoting

    C.

    painting with sodium silicate

    D.

    coating with tar.


  11. Inhaling of fly-ash over a long period causes

  12. A.

    silicosis

    B.

    fibrosis of lungs

    C.

    bronchitis

    D.

    pneumonitis

    E.

    All of these.


  13. Minimum required water cement ratio for a workable concrete, is

  14. A.

    0.30

    B.

    0.40

    C.

    0.50

    D.

    0.60

    E.

    1.0.


  15. Rocks formed due to alteration of original structure due to heat and excessive pressure are called

  16. A.

    sedimentary rocks

    B.

    igneous rocks

    C.

    metamorphic rocks

    D.

    none of these.


  17. The compound of Portland cement which contributes to the strength after two to three years is

  18. A.

    Tricalcium silicate

    B.

    Di-calcium silicate

    C.

    Tricalcium aluminate

    D.

    Tetracalcium alumino ferrite.


  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.