Miscellaneous

Q. In the design of a masonry retaining wall, the

1. vertical load should fall within the middle-third of base width
2. horizontal thrust should act at $\frac{h}{3}$ from base
3. resultant load should fall within a distance of one-sixth of base width on either side of its midpoint
4. resultant load should fall within a distance of one-eighth of base width on either side of its midpoint

Q. A short hollow $CI$ column section $A$ is $150c{m}^2$ and the section modulus $Z=10\times {10}^{5}m{m}^3$ carries
(i) an axial load of $250kN,$ and
(ii) a load of $50kN$ on a bracket, the load line being $500mm$ from the axis of column
The maximum and minimum stress intensities are

1. $50N/m{m}^2$ tensile and $10N/m{m}^2$ compressive
2. $45N/m{m}^2$ compressive and $5N/m{m}^2$ tensile
3. $55N/m{m}^2$ compressive and $5N/m{m}^2$ tensile
4. $60N/m{m}^2$ tensile and $10N/m{m}^2$ compressive

Q. The base of a column is subjected to moment. If the intensity of bearing pressure due to axial load is equal to stress due to moment, then the bearing pressure between the base and the concrete is

1. Uniform compression throughout
2. Zero at one end and compression at the other end
3. Tension at one end and compression at the other end
4. Compression, varying as a parabolic profile

Q. Assertion (A): In the vertical face of triangular retailing wall of any $\frac{h}{b}$ ratio, the eccentricity is $\frac{b}{6}$ for dead storage condition.
Reason (R): For triangular retaining wall under full storage level (retained by vertical face) the eccentricity will be $\frac{b}{6}$ only if $\frac{h}{b}$ ratio is $\sqrt{S}$ (where $S$ is specific gravity of the material of the wall).

1. both A and R are true and R is the correct explanation of A
2. both A and R are true but R is not a correct explanation of A
3. A is true but R is false
4. A is false but R is true

Q. Which one of the following pairs is not correctly matched?

1. Lame's constants : Thick cylinder
2. Macaulay's method : Deflection of beam
3. Euler's method : Theory of column
4. Eddy's theorem : Torsion of shafts