## 21. In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at

## 22. On piles, the drop must be at least

## 23. If a bent tendon is required to balance a concentrated load W at the centre of the span L, the central dip h must be at least

## 24. A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm^{2} steel. If the modular ratio (m) is 15, the depth of the neutral axis, is

^{2}steel. If the modular ratio (m) is 15, the depth of the neutral axis, is

## 25. As per IS : 456, the reinforcement in a column should not be less than

## 26. If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than

## 27. The diameter of main bars in R.C.C. columns, shall not be less than

## 28. Minimum spacing between horizontal parallel reinforcement of the same size should not be less than

## 29. Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than

## 30. If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than

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