# Civil Engineering - RCC Structures Design

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

26.

The number of treads in a flight is equal to

 A. risers in the flight B. risers plus one C. risers minus one D. none of these.

Explanation:

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27.

A short column 20 cm x 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm2 and 300 kg/cm2, the Safe load on the column, should not exceed

 A. 4120 kg B. 41, 200 kg C. 412, 000 kg D. none of these.

Explanation:

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28.

The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm2, safe shear stress 5 kg/cm2 and B.M. 24 mt,

 A. is safe in shear B. is unsafe in shear C. is over safe in shear D. needs redesigning.

Explanation:

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29.

In a beam the local bond stress Sb, is equal to

 A. B. C. D. E. None of these.

Explanation:

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30.

According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is

 A. 5 kg/cm2 B. 10 kg/cm2 C. 15 kg/cm2 D. 20 kg/cm2 E. 25 kg/cm2