Building Materials - Section 4 Multiple Questions and Answers.




21.Pick up the correct statement from the following:
A. The plywoods do not split or crack due to changes in atmosphere
B. The commercial plywoods are available upto 150 cm wide and upto 300 cm long
C. The plywoods possess uniform tensile strength in all directions
D. All the above.

22.The main ingredient of a good quality brick earth, is
A. magnesia
B. lime
C. silica
D. alumina.

23.Bitumen is generally obtained from
A. organic material
B. synthetic material
C. petroleum product
D. coal.

24.For one cubic metre of brick masonry, number of bricks required, is
A. 400
B. 425
C. 450
D. 500

25.The steel which contains fissures and cavities, is manufactured by
A. Cementation process
B. Crucible process
C. Bessemer process
D. Open hearth process.

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