Civil Engineering - Building Materials

21. 

The percentage of water for normal consistency, is

A. 5% to 15%
B. 10% to 25%
C. 15% to 25%
D. 20% to 30%
E. 25% to 35%.

Answer: Option E

Explanation:

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22. 

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. The plywoods are light in weight
E. All the above.

Answer: Option E

Explanation:

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23. 

The main ingredient of a good quality brick earth, is

A. magnesia
B. lime
C. silica
D. alumina.

Answer: Option D

Explanation:

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24. 

Bitumen is generally obtained from

A. organic material
B. synthetic material
C. petroleum product
D. coal.

Answer: Option C

Explanation:

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25. 

For one cubic metre of brick masonry, number of bricks required, is

A. 400
B. 425
C. 450
D. 500
E. 550.

Answer: Option D

Explanation:

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