Civil Engineering - Building Materials

6. 

The silica is used for preparing

A. silica bricks
B. coke oven
C. lining for glass furnaces
D. all of these.

Answer: Option D

Explanation:

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7. 

Wrought iron is manufactured from pig iron by

A. refining
B. puddling
C. shingling
D. rolling
E. all the above.

Answer: Option E

Explanation:

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8. 

Pick up the correct statement from the following:

A. The phenol is carbolic acid
B. The phenol is either extracted from coal-tar or prepared from benzene
C. Phenol reacts with formaldehyde, to form phenol formaldehyde resin
D. The plastics prepared from phenol-formaldehyde are used for paints, varnishes, w.c. seats
E. All the above.

Answer: Option E

Explanation:

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9. 

Fibre boards can be

A. distempered
B. painted
C. painted and distempered
D. used for furniture.

Answer: Option D

Explanation:

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10. 

Pick up the correct statement from the following:

A. Catalysts are added to assist and accelerate the hardening of resin,
B. The fillers are inert materials and they impart strength and hardness
C. Fibrous fillers increase thermal resistance
D. All the above.

Answer: Option D

Explanation:

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