RCC Structures Design

211. The steel generally used in R.C.C. work, is

1. Stainless
2. Mild steel
3. High carbon steel
4. High tension steel

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212. The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, is

1. 51.5
2. 52.5
3. 53.5
4. 54.5

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213. The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm² and 250 kg/cm² respectively. If m = 15, the depth of its neutral axis is

1. 20 cm
2. 25 cm
3. 30 cm
4. 35 cm

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214. The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as

1. Freyssinet system
2. Magnel-Blaton system
3. C.C.L. standard system
4. Lee-McCall system

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215. The thickness of base slab of a retaining wall generally provided, is

1. One half of the width of the stem at the bottom
2. One-third of the width of the stem at the bottom
3. One fourth of the width of the steam at the bottom
4. Width of the stem at the bottom

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216. The thickness of the topping of a ribbed slab, varies between

1. 3 cm to 5 cm
2. 5 cm to 8 cm
3. 8 cm to 10 cm
4. 12 cm to 15 cm

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217. The toe projection of foundation slabs is taken

1. As one third of the base
2. As one sixth of overall height of the wall
3. Equal to heel slab
4. Below ground surface

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218. The transverse reinforcements provided at right angles to the main reinforcement

1. Distribute the load
2. Resist the temperature stresses
3. Resist the shrinkage stress
4. All the above

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219. The weight of a foundation is assumed as

1. 5% of wall weight
2. 7% of wall weight
3. 10% of wall weight
4. 12% of wall weight

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220. The weight of reinforced concrete, is generally taken as

1. 2200 kg/m³
2. 2300 kg/m³
3. 2400 kg/m³
4. 2500 kg/m³

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