RCC STRUCTURES DESIGN QUIZ

The weight of a foundation is assumed as

10% of wall weight

5% of wall weight

7% of wall weight

12% of wall weight

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YOUR ANSWER : ?

If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and σc are the modular ratio and maximum stress in the configuration of concrete, the strength of column is

All listed here

σcAc + m σcAsc

σc[A + (m - 1)Asc]

σc(A - Asc) + m σcAsc

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YOUR ANSWER : ?

The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is

20

35

30

25

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If the shear stress in a R.C.C. beam is

Greater than 20 kg/cm², the size of the section is changed

Equal or less than 5 kg/cm², no shear reinforcement is provided

All of these

Greater than 4 kg/cm², but less than 20 kg/cm², shear reinforcement is provided

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A circular slab subjected to external loading, deflects to form a

Paraboloid

Semi-hemisphere

None of these

Ellipsoid

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A flat slab is supported

On beams and columns

On columns

On beams

On columns monolithically built with slab

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YOUR ANSWER : ?

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

m = 3500/3C

m = 1400/3C

m = 700/3C

m = 2800/3C

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YOUR ANSWER : ?

High strength concrete is used in pre-stressed member

To provide high bond stresses

To overcome high bearing stresses developed at the ends

To overcome bursting stresses at the ends

All listed here

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If K is a constant depending upon the ratio of the width of the slab to its effective span l, x is the distance of the concentrated load from the nearer support, bw is the width of the area of contact of the concentrated load measured parallel to the supported edge, the effective width of the slab be is

All listed here

Kx (1 + x/l) + bw

K/x (1 + x/d) + bw

Kx (1 - x/l) + bw

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If the average bending stress is 6 kg/cm² for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is

58 d

28 d

38 d

48 d

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