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Civil Engineering :: Building Materials

  1. To give a brilliant finish, the type of varnish used, is

  2. A.

    water varnish

    B.

    spirit varnish

    C.

    turpentine varnish

    D.

    oil varnish

    E.

    none of these.


  3. Pick up the correct statement from the following:

  4. A.

    Bull's trench kiln a trench excavated in ground

    B.

    Hoffman's kiln is constructed overground

    C.

    Tunnel Kiln is constructed as a tunnel

    D.

    All the above.


  5. The softest rock is

  6. A.

    marble

    B.

    diamond

    C.

    talc

    D.

    quartz.


  7. Bitumen may be dissolved in

  8. A.

    carbondioxide

    B.

    water

    C.

    sodium chloride

    D.

    carbon disulphide

    E.

    none of these.


  9. Pick up the correct statement from the following:

  10. A.

    Rusting is caused due to combined action of air, moisture and carbon dioxide

    B.

    During rusting, first ferrous bicarbonates are formed

    C.

    On further oxidation ferrous bicarbonates get converted to ferric bicarbonates

    D.

    Ultimately hydrated ferric oxide is formed during rusting and carbon dioxide gets liberated

    E.

    All the above.


  11. Whitworth compressed steel is obtained when molten steel is subjected to a pressure of

  12. A.

    5 kg/mm2

    B.

    9 kg/mm2

    C.

    13 kg/mm2

    D.

    15 kg/mm2

    E.

    10 kg/mm2.


  13. Asbestos

  14. A.

    is an excellant insulator for heat and electricity

    B.

    is fire-proof and acid proof

    C.

    has sp. gravity equal to 3.10

    D.

    is smooth like glass and silk

    E.

    All the above.


  15. Mild steel is used for

  16. A.

    structural works in beams, joints and girders

    B.

    small sized water pipes

    C.

    columns and struts

    D.

    none of these.


  17. The sequence of refractory materials according to increasing melting points is :

  18. A.

    Dolomite, Magnesia, Bauxite, Chromite

    B.

    Bauxite, Chromite, Dolomite, Magnesia

    C.

    Magnesia, Bauxite, Dolomite, Chromite.


  19.  

    Veneering means

  20. A.

    carving out designs on timber planks

    B.

    chemically treating timber planks

    C.

    thick layer of superior wood glued to inferior wood

    D.

    thin layer of superior wood glued to inferior wood.