Civil Engineering - Building Materials
Exercise :: Building Materials - Section 6
| 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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