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:
|
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:
|
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:
|
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:
|
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:
|