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Civil Engineering :: Building Materials

  1. For making fly-ash building bricks, the following mix of fly-ash, sand and lime, is

  2. A.

     80 : 13 : 7

    B.

     70 : 20 : 10

    C.

     60 : 35 : 5

    D.

     None of these


  3. Sand stone is

  4. A.

     Sedimentary rock

    B.

     Metamorphic rock

    C.

     Igneous rock

    D.

     Volcanic rock


  5. Seasoning is

  6. A.

     A process of removing sap

    B.

     Creosoting

    C.

     Painting with sodium silicate

    D.

     Coating with tar


  7. The variety of pig iron used for the manufacture of steel by Bessemer process, is

  8. A.

     Bessemer pig

    B.

     Grey pig

    C.

     White forge pig

    D.

     Mottled pig


  9. Seasoning of timber is essential to remove

  10. A.

     Knots from timber

    B.

     Sap from timber

    C.

     Twisted fibre from timber

    D.

     Roughness of timber


  11. The preparation of surface of stone to obtain plain edges or to obtain stones of required size and shape is known as

  12. A.

     Quarrying of stones

    B.

     Blasting of stones

    C.

     Seasoning of stones

    D.

     Dressing of stones


  13. Shingle is

  14. A.

     Decomposed laterite

    B.

     Crushed granite

    C.

     Water bound pebbles

    D.

     Air weathered rock


  15. Brass is an alloy of

  16. A.

     Copper and zinc

    B.

     Zinc and lead

    C.

     Tin and silver

    D.

     Zinc and nickel


  17. The most fire resistant paints are:

  18. A.

     Enamel paints

    B.

     Aluminium paints

    C.

     Asbestos paints

    D.

     Cement paints


  19. Assertion A : Pure lime takes a long time to develop adequate strength.
    Reason R : Pure lime has slow hardening characteristics.
    Select your answer according to the coding system given below:

  20. A.

     Both A and R is true and R is correct explanation of A

    B.

     Both A and R is true and R is not a correct explanation of A

    C.

     A is true but R is false

    D.

     A is false but R is true