Civil Engineering - Building Materials

1. 

Pick up the correct statement from the following:

A. The percentage of absorption for firebricks varies from 5 to 10
B. The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
C. Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
D. The compressive strength of silica bricks is about 150 kg/cm2
E. All the above.

Answer: Option E

Explanation:

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2. 

Spirit varnish generally consists of

A. oil, wax and resin
B. alcohol, wax and turpentine
C. pigment and synthetic resin
D. spirit and shellac
E. none of these.

Answer: Option D

Explanation:

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3. 

Pick up the correct statement from the following:

A. Roasting is not necessary if iron ore is an oxide
B. Impurities float on the molten iron as slag
C. The slag contains lime about 45%
D. The molten iron is made to run, in a long channel formed in sand called 'sow'
E. All the above.

Answer: Option E

Explanation:

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4. 

The tendency of a stone is, to split along:

A. texture
B. fracture
C. cleavage
D. structure
E. all the above.

Answer: Option C

Explanation:

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5. 

Acrylic is the name of

A. cellulose resin
B. alkyd resin
C. methyl metha crylate
D. cumarone-indene.

Answer: Option C

Explanation:

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