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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


  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


  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


  7. Bituminous fells are used for

  8. A.

     Covering A.C. sheets

    B.

     Covering sloping roofs

    C.

     D.P.C.

    D.

     None to these


  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


  11. Mastic asphalt is generally used for

  12. A.

     Damp proof course

    B.

     Water proof layer

    C.

     Partition walls

    D.

     Both (A) and (B)


  13. Vanadium steel is generally used for

  14. A.

     Railway switches and crossing

    B.

     Bearing balls

    C.

     Magnets

    D.

     Axles and springs


  15. Plastic bitumen is generally used for

  16. A.

     Road pavements

    B.

     Expansion joints

    C.

     Crack fillings

    D.

     None to these


  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)


  19. The commonly used color pigment in paints, is

  20. A.

     Ambers

    B.

     Carbon black

    C.

     Iron oxide

    D.

     All the above