Civil Engineering · all questions

RCC Structures Design
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Q141

If

l_{1}

and

l_{2}

are the lengths of long and short spans of a two way slab simply supported on four edges and carrying a load w per unit area, the ratio of the loads split into w₁ and w₂ acting on strips parallel to

l_{2}

and

l_{1}

is

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Q142

The minimum thickness of a flat slab is taken

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Q143

Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension

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Q144

The number of treads in a flight is equal to

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Q145

An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm φ placed symmetrically along the circumference. If it carries a load of 40,000 kg axially, the stress is

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Q146

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

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Q147

The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is

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Q148

In a singly reinforced beam, the effective depth is measured from its compression edge to

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Q149

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

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Q150

The advantage of reinforced concrete, is due to

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Q151

The spacing of transverse reinforcement of column is decided by the following consideration.

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Q152

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

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Q153

The design of heel slab of a retaining wall is based on the maximum bending moment due to:

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Q154

A pile of length ‘L’ carrying a uniformly distributed load ‘W’ per metre length is suspended at the centre and from other two points 0.15 L from either end; the maximum hogging moment will be

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Q155

Steel bars are generally connected together to get greater length than the standard length by providing

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Q156

If A_c, A_sc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and

σ_{c}

are the modular ratio and maximum stress in the configuration of concrete, the strength of column is

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Q157

If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm² and 1400 kg/cm² respectively and the modular ratio is 18, the percentage area A_st of the steel required for an economic section, is

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Q158

The maximum ratio of span to depth of a cantilever slab, is

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Q159

An R.C.C. column is treated as long if its slenderness ratio is greater than

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Q160

The ratio of the breadth to effective depth of a beam is kept

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