The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm² and 250 kg/cm² respectively. If m = 15, the depth of its neutral axis is

Distribution of shear intensity over a rectangular section of a beam, follows:

A. A circular curve

B. A straight line

C. A parabolic curve

D. An elliptical curve

If the shear stress in a R.C.C. beam is

A. Equal or less than 5 kg/cm², no shear reinforcement is provided

B. Greater than 4 kg/cm², but less than 20 kg/cm², shear reinforcement is provided

C. Greater than 20 kg/cm², the size of the section is changed

D. All the above

In a pre-stressed member it is advisable to use

A. Low strength concrete only

B. High strength concrete only

C. Low strength concrete but high tensile steel

D. High strength concrete and high tensile steel

In a simply supported slab, alternate bars are curtailed at

A. $${\frac{1}{4}^{{\text{th}}}}$$ of the span

B. $${\frac{1}{5}^{{\text{th}}}}$$ of the span

C. $${\frac{1}{6}^{{\text{th}}}}$$ of the span

D. $${\frac{1}{7}^{{\text{th}}}}$$ of the span