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RCC Structures Design

RCC Structures Design
An R.C.C. beam not provided with shear reinforcement may develop cracks in its bottom inclined roughly to the horizontal at

55°
45°
25°
35°

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RCC Structures Design
Lapped splices in tensile reinforcement are generally not used for bars of size larger than

36 mm diameter
18 mm diameter
30 mm diameter
24 mm diameter

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RCC Structures Design
‘P’ is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The minimum stress ‘f’ on the beam subjected to a maximum bending moment ‘M’ is

f = (P/A) - (M/Z)
f = (A/P) - (M/Z)
f = (P/'- (Z/M)
f = (P/A) - (M/6Z)

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RCC Structures Design
In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength

400 kg/cm²
200 kg/cm²
100 kg/cm²
300 kg/cm²

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RCC Structures Design
The maximum shear stress (qmax) in a rectangular beam is

1.25 times the average
2.0 times the average
1.75 times the average
1.50 times the average

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RCC Structures Design
A foundation is called shallow if its depth, is

Three-fourth of its width
Equal to its width
One-fourth of its width
Half of its width

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