While estimating a reinforced cement structure, the omitted cover of concrete is assumed_______________?

A. At the end of reinforcing bar, not less than 25 mm or twice the diameter of the bar
B. In thin slabs, 12 mm minimum or diameter of the bar whichever is more
C. For reinforcing longitudinal bar in a beam 25 mm minimum or diameter of the largest bar which is more
D. All the above
✅ The correct answer is option D.

The reduced levels of points, 30 metres apart along the longitudinal section of a road portion between chainages 5 and 9 are shown in the given figure. If there is a uniform up-gradient of the road 120 in 1, the chainage of the point with no filling or cutting is__________________?

A. (6 + 15) chains
B. (6 + 12) chains
C. (6 + 18) chains
D. None of these
✅ The correct answer is option B.