Civil Engineering - Building Materials
Exercise :: Building Materials - Section 4
| 41. |
Cast iron |
| A. |
is obtained by purifying pig iron | | B. |
is manufactured in required shapes | | C. |
may contain 2 to 5 per cent of carbon with other impurities | | D. |
is remelted in a cupola furnace | | E. |
all the above. |
Answer: Option E
Explanation:
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| 42. |
Asbestos is |
| A. |
corrugated sheet used for roofing | | B. |
an incombustible fire proof material | | C. |
an organic substance | | D. |
a bad insulator for sound and heat | | E. |
all the above. |
Answer: Option E
Explanation:
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| 43. |
In a rock calcium carbonate predominates. State whether it is : |
| A. |
Sillicious rock | | B. |
Argillaceous rock | | C. |
Calcareous rock | | D. |
None of these. |
Answer: Option C
Explanation:
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| 44. |
In order of increasing percentage of silica, the correct sequence is |
| A. |
sandy clay, calcareous clay, pure clay | | B. |
calcareous clay, pure clay, sandy clay | | C. |
pure clay, sandy clay, calcareous clay | | D. |
None of these. |
Answer: Option B
Explanation:
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| 45. |
The rocks which are formed due to pouring of magma at the earth's surface are called |
| A. |
Plutonic rocks | | B. |
Hypabyssal rocks | | C. |
Volcanic rocks | | D. |
Igneous rocks |
Answer: Option C
Explanation:
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