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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

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  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°

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

  6. A.

     Thinner

    B.

     Vehicle

    C.

     Pigment

    D.

     All the above

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  7. Stucco paints are suitable for

  8. A.

     Stone masonry

    B.

     Brick walls

    C.

     Both (A) and (B)

    D.

     Neither (A) nor (B)

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  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

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  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

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

  14. A.

     400

    B.

     450

    C.

     500

    D.

     550

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  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

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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

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  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

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