# Civil Engineering - RCC Structures Design

### Exercise :: RCC Structures Design - Section 1

31.

A foundation rests on

 A. base of the foundation B. subgrade C. foundation soil D. both (b) and (c)

Answer: Option D

Explanation:

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32.

For initial estimate for a beam design, the width is assumed

 A. 1/15th of span B. 1/20th of span C. 1/25th of span D. 1/30th of span E. 1/40th of span.

Answer: Option D

Explanation:

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33.

If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width

 A. R + T B. T-R C. R2 + T2 D. R-T

Answer: Option C

Explanation:

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34.

The advantage of a concrete pile over a timber pile, is

 A. no decay due to termites B. no restriction on length C. higher bearing capacity D. not necessary to cut below the water mark E. all the above.

Answer: Option E

Explanation:

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35.

If the permissible compressive stress for a concrete in bending is C kg/m2, the modular ratio is

 A. 2800/C B. 2300/2C C. 2800/3C D. 2800/C2

Answer: Option C

Explanation:

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