Civil Engineering - Concrete Technology

41. 

The compaction of concrete, improves

A. density
B. strength
C. durability
D. all the above.

Answer: Option D

Explanation:

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42. 

Pick up the correct statement from the following:

A. Water cement paste hardens due to hydration
B. During hardening cement binds the aggregates together
C. Cement provides strength, durability and water tightness to the concrete
D. All the above.

Answer: Option D

Explanation:

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43. 

The light weight aggregates are obtained from

A. sedimentary rocks
B. metamorphic rocks
C. igneous rocks
D. volcanic source.

Answer: Option D

Explanation:

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44. 

If the depth of moist sand in a cylinder is 15 cm and the depth of the sand when fully inundated with water is 12 cm, the bulking of the moist sand, is

A. 10%
B. 12%
C. 15%
D. 20%
E. 25%.

Answer: Option E

Explanation:

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45. 

Pick up the correct statement from the following:

A. According to the petrological characteristics, concrete aggregates are classified as heavy weight, normal weight and light weight
B. According to the shape of the particles, concrete aggregates are classified as rounded irregular, angular and flaky
C. According to the surface texture of the particles, the concrete aggregates are classified as glassy, smooth, granular, rough, crystalline, honey combed and porous
D. All the above.

Answer: Option D

Explanation:

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