RCC STRUCTURES DESIGN QUIZ

A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is

WL/4P

WL/3P

WL/2P

WL/P

TRUE ANSWER : ?
YOUR ANSWER : ?

If q is the punching shear resistance per unit area a, is the side of a square footing for a column of side b, carrying a weight W including the weight of the footing, the depth (D) of the footing from punching shear consideration, is

D = W (a² - b²)/8a²bq

D = W (a² - b²)/4a²bq

D = W (a - b)/4a²bq

D = W (a² - b²)/4abq

TRUE ANSWER : ?
YOUR ANSWER : ?

Long and short spans of a two way slab are ly and lx and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. According to Rankine Grashoff theory

None of these

(wx/wy) = (ly/lx)²

(wx/wy) = (ly/lx)⁴

(wx/wy) = (ly/lx)

TRUE ANSWER : ?
YOUR ANSWER : ?

‘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 = (A/P) - (M/Z)

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

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

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

TRUE ANSWER : ?
YOUR ANSWER : ?

If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm², the length of the beam having nominal reinforcement, is

12 cm

6 cm

8 cm

10 cm

TRUE ANSWER : ?
YOUR ANSWER : ?

The angle of repose of a soil is the maximum angle which the outer face of the soil mass makes

With the perpendicular to the inclined plane of the soil

With the horizontal

With the vertical

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of

h/2

h/4

h/3

2h/3

TRUE ANSWER : ?
YOUR ANSWER : ?

A pile of length ‘L’ carrying a uniformly distributed load ‘W’ per metre length is suspended at two points, the maximum, B.M. at the centre of the pile or at the points of suspension, is

WL²/47

WL²/24

WL/8

WL²/16

TRUE ANSWER : ?
YOUR ANSWER : ?

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

8

16

12

10

TRUE ANSWER : ?
YOUR ANSWER : ?

The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm², safe shear stress 5 kg/cm² and B.M. 24 mt,

Needs redesigning

Is safe in shear

Is unsafe in shear

Is over safe in shear

TRUE ANSWER : ?
YOUR ANSWER : ?

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