RCC Structures Design

191. The maximum shear stress (q) in concrete of a reinforced cement concrete beam is

1. Shear force/(Lever arm × Width)
2. Lever arm/(Shear force × Width)
3. Width/(Lever arm × Shear force)
4. (Shear force × Width)/Lever arm

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192. The maximum shear stress (q^max) in a rectangular beam is

1. 1.25 times the average
2. 1.50 times the average
3. 1.75 times the average
4. 2.0 times the average

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193. The minimum clear cover for R.C.C. columns shall be

1. Greater of 40 mm or diameter
2. Smaller of 40 mm or diameter
3. Greater of 25 mm or diameter
4. Smaller of 25 mm or diameter

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194. The minimum cube strength of concrete used for a pre-stressed member, is

1. 50 kg/cm²
2. 150 kg/cm²
3. 250 kg/cm²
4. 350 kg/cm²

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195. The minimum head room over a stair must be

1. 200 cm
2. 205 cm
3. 210 cm
4. 230 cm

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196. The minimum number of main steel bars provided in R.C.C.

1. Rectangular columns is 4
2. Circular columns is 6
3. Octagonal columns is 8
4. All the above

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197. The minimum thickness of a flat slab is taken

1. L/32 for end panels without drops
2. L/36 for end panels without drops
3. L/36 for interior panels without drop
4. All the above

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198. The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of

1. 10 mm
2. 15 mm
3. 20 mm
4. 25 mm

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199. The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation.

1. m = 700/3C
2. m = 1400/3C
3. m = 2800/3C
4. m = 3500/3C

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200. The neutral axis of a T-beam exists

1. Within the flange
2. At the bottom edge of the slab
3. Below the slab
4. All the above

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