## 1. If $${{l_1}}$$ and $${{l_2}}$$ are the lengths of long and short spans of a two way slab simply supported on four edges and carrying a load w per unit area, the ratio of the loads split into w_{1} and w_{2} acting on strips parallel to $${{l_2}}$$ and $${{l_1}}$$ is

_{1}and w

_{2}acting on strips parallel to $${{l_2}}$$ and $${{l_1}}$$ is

## 2. The minimum thickness of a flat slab is taken

## 3. Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension

## 4. The number of treads in a flight is equal to

## 5. An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm φ placed symmetrically along the circumference. If it carries a load of 40,000 kg axially, the stress is

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