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Civil Engineering :: Building Materials

  1. The low voltage porcelain is mainly used for

  2. A.

    switch block

    B.

    insulating tubes

    C.

    lamp sockets

    D.

    All of these.

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  3. Putty is

  4. A.

    made with finely powdered chalk and linseed oil

    B.

    used for fixing glass panes

    C.

    softened by a solution of pearl ash and quick-lime soaked in water

    D.

    all the above.

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  5. The initial setting time of hydraulic lime, is

  6. A.

    30 minutes

    B.

    60 minutes

    C.

    90 minutes

    D.

    120 minutes

    E.

    150 minutes.

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  7. PVC stands for

  8. A.

    plastic very compact

    B.

    polythene vinyl chloride

    C.

    polythene vinyl carbon

    D.

    polythene vanadium carbide.

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  9. Generally wooden moulds are made from

  10. A.

    ply wood

    B.

    shisham wood

    C.

    deodar wood

    D.

    teak wood

    E.

    hard wood.

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  11.  

    Cement paints usually

  12. A.

    contain hydrated lime

    B.

    contain 5% to 10% colour pigments

    C.

    are prepared with white cement

    D.

    contain 5% sodium chloride

    E.

    all the above.

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  13. The cement becomes unsound by the presence of excess

  14. A.

    sulphur

    B.

    magnesia

    C.

    lime

    D.

    All of these.

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  15. The kiln which may work throughout the year, is

  16. A.

    Clamp

    B.

    Bull's kiln

    C.

    Hoffman's kiln

    D.

    none of these.

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  17. The minimum compressive strength of 1st class bricks should be

  18. A.

    75 kg/cm2

    B.

    90 kg/cm2

    C.

    100 kg/cm2

    D.

    120 kg/cm2

    E.

    130 kg/cm2.

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  19. A volatile substance added to a paint to make its application easy and smooth, is known as

  20. A.

    base

    B.

    solvent

    C.

    vehicle

    D.

    none to these.

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