Civil Engineering - Building Materials

26. 

Slacking of lime is affected by

A. keeping it exposed to air
B. immersing the lime in water
C. crushing the lime lumps
D. none of these.

Answer: Option B

Explanation:

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27. 

The steel used in R.C.C. work is

A. stainless steel
B. mild steel
C. high carbon steel
D. wrought iron.

Answer: Option B

Explanation:

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28. 

Mastic asphalt is

A. water proof
B. fire proof
C. elastic
D. all the above.

Answer: Option D

Explanation:

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29. 

Non acid-resistant asbestos is :

A. tremolite asbestos
B. chrysolite abestos
C. amosite absestos
D. none of these.

Answer: Option B

Explanation:

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30. 

Stones used for the construction of retaining walls must be

A. soft
B. hard
C. light
D. heavy.

Answer: Option D

Explanation:

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