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RCC Structures Design

RCC Structures Design
The live load to be considered for an inaccessible roof, is

200 kg/m²
75 kg/m²
Nil
150 kg/cm²

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RCC Structures Design
The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than

18 bar diameters
36 bar diameters
24 bar diameters
30 bar diameters

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RCC Structures Design
If p1 is the vertical intensity of pressure at a depth h on a block of earth weighing w per unit volume and the angle of repose φ, the lateral intensity of pressure p2 is

wh (1 - tan φ)/(1 + tan φ)
w (1 - cos φ)/h (1 + sin φ)
wh (1 - sin φ)/(1 + sin φ)
wh (1 - cos φ)/(1 + sin φ)

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RCC Structures Design
High strength concrete is used in pre-stressed member

To provide high bond stresses
All listed here
To overcome bursting stresses at the ends
To overcome high bearing stresses developed at the ends

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RCC Structures Design
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

52.5
54.5
51.5
53.5

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RCC Structures Design
As per I.S. 456 - 1978, the pH value of water shall be

Equal to 6
Equal to 7
Less than 6
Not less than 6

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