If permissible working stresses in steel and concrete are respectively 1400 kg/cm² and 80 kg/cm² and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, 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