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Civil Engineering :: Building Materials

  1. The method of addition polymerization is used for obtaining:

  2. A.

     Polystyrene

    B.

     Polypropylene

    C.

     Polyvinylchloride

    D.

     All of these

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  3. Index number expressing the relative sizes of both coarse and fine aggregates, is called

  4. A.

     Proportioning of aggregates

    B.

     Fineness modulus

    C.

     Grading of aggregates

    D.

     None of these

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  5. During smelting process, the combination of fuel in the furnace

  6. A.

     Forms carbon dioxide

    B.

     Carbon dioxide with carbon forms carbon mono-oxide

    C.

     Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2

    D.

     All the above

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  7. Bituminous fells are used for

  8. A.

     Covering A.C. sheets

    B.

     Covering sloping roofs

    C.

     D.P.C.

    D.

     None to these

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  9. The slag which floats on the surface of the molten iron generally contains

  10. A.

     Lime (CaO) 45%

    B.

     Silica (SiO2) 35%

    C.

     Alumina (Al2O3) 12% and MgO, CaSO4, KMnO2 and FeO 8%

    D.

     All the above

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  11. Mastic asphalt is generally used for

  12. A.

     Damp proof course

    B.

     Water proof layer

    C.

     Partition walls

    D.

     Both (A) and (B)

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  13. Vanadium steel is generally used for

  14. A.

     Railway switches and crossing

    B.

     Bearing balls

    C.

     Magnets

    D.

     Axles and springs

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  15. Plastic bitumen is generally used for

  16. A.

     Road pavements

    B.

     Expansion joints

    C.

     Crack fillings

    D.

     None to these

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  17. Lime concrete is generally used for

  18. A.

     Wall foundations

    B.

     Flooring at ground level

    C.

     Both (A) and (B)

    D.

     Neither (A) nor (B)

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  19. The commonly used color pigment in paints, is

  20. A.

     Ambers

    B.

     Carbon black

    C.

     Iron oxide

    D.

     All the above

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