Civil Engineering MCQs

Page No. 227

The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as________________?


aFreyssinet system


bMagnel-Blaton system


cC.C.L. standard system


dLee-McCall system


View Answer Lee-McCall system

In a doubly-reinforced beam if and the effective depth and is depth of critical neutral axis, the following relationship holds good______________?


amc/t = n/(d – n)


b(m + c)/t = n/(d + n)


c(t + c)/n = (d + n)/n


dmc/t = (d – n)/t


View Answer mc/t = n/(d – n)

The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or____________________?


a 12 bar diameters


b18 bar diameters


c24 bar diameters


d30 bar diameters


View Answer 24 bar diameters

An under-reinforced section means_________________?


a Steel is provided at the underside only


b Steel provided is insufficient


cSteel provided on one face only


dSteel will yield first



The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called_________________?


a Balanced section


bEconomic section


cCritical section


dAll the above


View Answer All the above

If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment____________________?


aWL/2


b WL/4


cWL/6


dWL/8


View Answer WL/6

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________________?


a8 cm


b6 m


c 8 m


d 10 m


View Answer 8 m

With usual notations the depth of the neutral axis of a balanced section, is given by______________?


amc/t = (d – n)/n


b t/mc = (d – n)/n


c t/mc = (d + n)/n


dmc/t = n/ (d – n)


View Answer mc/t = n/ (d – n)

In a beam the local bond stress Sb, is equal to_______________?


a Shear force/(Leaver arm × Total perimeter of reinforcement)


bTotal perimeter of reinforcement/(Leaver arm × Shear force)


cLeaver arm/(Shear force × Total perimeter of reinforcement)


dLeaver arm/(Bending moment × Total perimeter of reinforcement)



A retaining wall and is the horizontal earth pressure, the factor of safety If is weight of against sliding, is_____________?


a1.0


b1.25


c1.5


d2.0


View Answer 1.5

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