Civil Engineering - Building Materials

6. 

Glazing of clay products, is done

A. to improve their appearance
B. to protect them from atmospheric effect
C. to protect them from corrosive action
D. all the above.

Answer: Option D

Explanation:

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7. 

Lime mortar is generally made with

A. quick lime
B. fat lime
C. hydraulic lime
D. plain lime
E. none of these.

Answer: Option C

Explanation:

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8. 

Duco paints are

A. plastic paints
B. cellulose paints
C. emulsion paints
D. bituminous paints
E. oil paints.

Answer: Option E

Explanation:

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9. 

Pick up the correct statement from the following:

A. Melamine is obtained from calcium carbide
B. Formaldehyde is prepared synthetically from methane
C. The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin
D. The plastics made from melamine formaldehyde resin, are used for electrical insulators
E. All the above.

Answer: Option E

Explanation:

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10. 

Steel contains carbon approximately

A. 1.50% to 5.6%
B. 0.05% to 1.75%
C. 0.25%
D. none to these.

Answer: Option B

Explanation:

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