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RCC Structures Design

RCC Structures Design
If W is the load on a circular slab of radius R, the maximum circumferential moment at the centre of the slab, is

Zero
3WR²/16
WR²/16
2WR²/16

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RCC Structures Design
A singly reinforced beam has breadth b, effective depth d, depth of neutral axis n and critical neutral axis n?. If fc and ft are permissible compressive and tensile stresses, the moment to resistance of the beam, is

Atft (d - n/3)
bn (fc/2) (d - n/3)
½ n₁ (1 - n₁/3) cbd²
All listed here

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

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

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RCC Structures Design
If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than

WL/12 (L - D/3)²
WL/12 (L - 2D/3)²
WL/10 (L - 2D/3)²
WL/10 (L + 2D/3)²

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RCC Structures Design
If the tendon is placed at an eccentricity e below the centroidal axis of the longitudinal axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge

Is increased by PZ/e
Is decreased by Pe/Z
Remains unchanged
Is increased by Pe/Z

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RCC Structures Design
If d and n are the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, is

d
d - n/3
d + n/3
n

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