Civil Engineering - Building Materials

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:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.