Civil Engineering MCQs

Page No. 256

The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on______________?


atop face perpendicular to wall


btop face perpendicular to wall


cboth top and bottom faces perpendicular to wall


dnone of the above



For a reinforced concrete section, the shape of shear stress diagram is_______________?


awholly parabolic


bwholly rectangular


cparabolic above neutral axis and rectangular below neutral axis


drectangular above neutral axis and parabolic below neutral axis



If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to__________________?


axv


bxc


cxv – TC


dTv + Tc


View Answer xv – TC

If the depth of neutral axis for a singly reinforced rectangular section is represented by kd in working stress design, then the value of k for balanced section_______________?


adepends on as, only


bdepends on aCbC only


cdepends on both crst and acbc


dis independant of both ast and acbc where d is the effective depth, ast is per-missible stress in steel in tension and ocbc is permissible stress in concrete in bend¬ing compression


View Answer depends on as, only

Modulus of elasticity of steel as per IS : 456-1978 shall be taken as______________?


a 20 kN/cm2


b200 kN/cm2


c200kN/mm2


d2xl06N/cm2


View Answer 200kN/mm2

For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine’s theory_______________?


a is always less than 1


bis always greater than 1


ccan be more than 1


dcan be less than 1



The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is______________?


anot needed


bprovided equally on inner and front faces


c provided more on inner face than on front face


d provided more on front face than on inner face



Which of the following R.C. retaining walls is suitable for heights beyond 6m ?


aL-shaped wall


bT-shaped wall


ccounterfort type


d all of the above


View Answer counterfort type

Due to circumferential action of the spiral in a spirally reinforced column________________?


acapacity of column is decreased


bductility of column reduces


c capacity of column is decreased but ductility of column increases


dboth the capacity of column and ductility of column increase



The load carrying capacity of a helically reinforced column as compared to that of a tied column is about________________?


a5% less


b10% less


c 5% more


d10% more


View Answer 5% more

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