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Civil Engineering :: Building Materials

  1. Gypsum consists of

  2. A.

     H₂S and CO₂

    B.

     CaSO4 and H₂O

    C.

     Lime and H₂O

    D.

     CO₂ and calcium


  3. For the manufacture of plywood, veneers are placed so that grains of adjacent veneers

  4. A.

     Run at right angles

    B.

     Parallel

    C.

     Inclined at 45°

    D.

     Inclined at 60°


  5. The most important constituent of an oil paint, is

  6. A.

     Thinner

    B.

     Vehicle

    C.

     Pigment

    D.

     All the above


  7. Stucco paints are suitable for

  8. A.

     Stone masonry

    B.

     Brick walls

    C.

     Both (A) and (B)

    D.

     Neither (A) nor (B)


  9. Depending on the chemical composition and mechanical properties, iron may be classified as

  10. A.

     Cast iron

    B.

     Wrought iron

    C.

     Steel

    D.

     All the above


  11. Initial setting time of cement for asbestos cement products should be not less than

  12. A.

     30 minutes

    B.

     50 minutes

    C.

     75 minutes

    D.

     90 minutes


  13. Number of bricks required for one cubic metre of brick masonry is

  14. A.

     400

    B.

     450

    C.

     500

    D.

     550


  15. The minimum compressive strength of 2nd class bricks should be

  16. A.

     75 kg/cm²

    B.

     90 kg/cm²

    C.

     100 kg/cm²

    D.

     120 kg/cm²


  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


  19. Permanent magnets are made of high carbon steel and

  20. A.

     15% of cobalt

    B.

     20% of cobalt

    C.

     35% of cobalt

    D.

     45% of cobalt