Civil Engineering - RCC Structures Design

21. 

A raft foundation is provided if its area exceeds the plan area of the building by

A. 10%
B. 20%
C. 30%
D. 40%
E. 50%

Answer: Option E

Explanation:

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22. 

The Total pressure on the vertical face of a retaining wall of height h exerted by the retained earth weighing w per unit volume having an angle of surcharge α°, is :

A.
B.
C.
D.

Answer: Option C

Explanation:

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23. 

If H is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is

A. 0.3 H
B. 0.4 H
C. 0.5 H
D. 0.6 H
E. 0.7 H

Answer: Option E

Explanation:

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24. 

The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, is

A. 51.5
B. 52.5
C. 53.5
D. 54.5
E. 55.5

Answer: Option C

Explanation:

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25. 

If depth of slab is 10 cm, width of web 30 cm, depth of web 50 cm, centre to centre distance of beams 3 m, effective span of beams 6 m, the effective flange width of the beam, is

A. 200 cm
B. 300 cm
C. 150 cm
D. 100 cm

Answer: Option C

Explanation:

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