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Civil Engineering :: Building Materials

  1. For the manufacture of Portland cement, the proportions of raw materials used, are

  2. A.

     Lime 63% ; silica 22% ; other ingredients 15%

    B.

     Lime 22% ; silica 63% ; other ingredients 15%

    C.

     Silica 40% ; lime 40% ; other ingredients 20%

    D.

     Silica 70% ; lime 20% ; other ingredients 10%

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  3. Galvanising means covering iron with a thin coat of

  4. A.

     Tin

    B.

     Zinc

    C.

     Glaze

    D.

     Coal tar

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  5. The plywood

  6. A.

     Has good strength along the panel only

    B.

     Can be spilt in the plane of the panel

    C.

     Has greater impact resistance to blows than ordinary wood

    D.

     Cannot be bent more easily than ordinary wood of same thickness

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  7. The type of arch generally constructed over a wooden lintel or over a flat arch for the purpose of carrying the load of the wall above is

  8. A.

     segmental arch

    B.

     pointed arch

    C.

     relieving arch

    D.

     flat arch

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  9. The constituent of cement which is responsible for all the undesirable properties of cement is

  10. A.

     Di-calcium silicate

    B.

     Tri-calcium silicate

    C.

     Tri-calcium aluminate

    D.

     Tetra calcium alumino ferrite

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  11. The main constituent of cement which is responsible for initial setting of cement is

  12. A.

     dicalcium silicate

    B.

     tricalcium silicate

    C.

     tricalcium aluminate

    D.

     all of the above

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  13. Three basic raw materials which are needed in large quantities for production of steel are

  14. A.

     Iron ore, coal and sulphur

    B.

     Iron ore, carbon and sulphur

    C.

     Iron ore, coal and lime stone

    D.

     Iron ore, carbon and lime stone

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  15. Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm, in one direction and 20 cm in the other direction, is called a

  16. A.

     Cant

    B.

     Deal

    C.

     Baulk

    D.

     Strip

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

  18. A.

     Tri-calcium silicate

    B.

     Di-calcium silicate

    C.

     Tri-calcium aluminate

    D.

     Tetra-calcium alumino ferrite

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  19. After storage, the strength of cement

  20. A.

     Decreases

    B.

     Increases

    C.

     Remains same

    D.

     May increase or decrease

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