Civil Engineering - Building Materials

31. 

Laterite is a/an

A. volcanic rock
B. argillaceous rock
C. calcareous rock
D. silicious rock.

Answer: Option B

Explanation:

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32. 

A stone is rejected if it absorbs water more than

A. 5%
B. 10%
C. 15%
D. 20%
E. 25%.

Answer: Option B

Explanation:

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33. 

The most valuable timber may be obtained from

A. chir
B. shisham
C. sal
D. teak.

Answer: Option D

Explanation:

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34. 

Pick up the correct statement from the following:

A. Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon
B. The edges of a finished wrought iron, are rough due to red shortage
C. Pig iron (charcoal) is manufactured from magnetic ore (Fe3O4)
D. For the manufacture of wrought iron, non-sulphurous fuel is not necessary
E. All the above.

Answer: Option E

Explanation:

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35. 

Pick up the compound responsible for early strength of cement from the following:

A. Tetra-calcium alumino-ferrite
B. Tricalcium silicate
C. Tricalcium aluminate
D. Dicalcium silicate.

Answer: Option B

Explanation:

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