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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