SYLLABUS : Design of column axially and uniaxially eccentricity loaded
1.Cross sectional width and depth of a column,
to resist the direct stress, is b and D, respectively. If the effective depth of the columns is d
then, According to IS 456:2000, the minimum area of longitudinal reinforcement in the
column shall be:
(a) 0.008bd (b) 0.006bD (c) 0.008bD (d) 0.006bd
2.As per IS 456:2000, A short axially loaded RCC column is designed assuming permissible
axial compressive stresses in steel and concrete as -
(a) 0.48 fy and 0.87 fck respectively (b) 0.40 fy and 0.67 fck respectively (c) 0.67 fy and
0.40 fck respectively (d) 0.87 fy and 0.48 fck respectively
3.The diameter of lateral ties in a column is
taken as :
(a) 1/4 diameter of the largest longitudinal bar (b) 6 mm
(c) Greater of 1/4 diameter of the largest longitudinal bar or 6 mm (d) None of these
4.Minimum reinforcement in a circular column
as per IS 456 is
(a) 4 bars of 12 mm (b) greater of 0.8% of cross sectional area and 4
bars of 12mm (c) 6 bars of 12mm (d) greater of 0.8% of cross sectional area and 6
bars of 12mm
5.Specify the percentage increase in load carrying capacity (specified in IS 456) for a
column having longitudinal reinforcement tied with spirals as compared to the allowable load
for it with lateral ties
(a) 10% (b) 20% (c) 25% (d) 5%
6. A helically reinforced column of 300 mm diameter has 6 bars of 24 mm diameter as
longitudinal reinforcement provided at an effective cover of 60 mm and spiral of 8 mm
diameter provided at a clear cover of 40 mm. The core diameter of this column is
(a) 212 mm (b) 220 mm (c) 180 mm (d) 204 mm
7.A short column 20 cm × 20 cm in section is reinforced with 4 bars whose area of cross
section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40
kg/cm2 and 300 kg/cm2, the safe load on the column should not exceed.
(a) 4120 kg (b) 21,200 kg (c) 412,000kg (d) None of these.
8.Lateral ties in RC columns are provided to resist
(a) Bending moment
(b) Shear
(c) Buckling of longitudinal steel bars
(d) Both bending moment and shear
9.. The effective length of masonry wall stiffened by buttresses on both ends and continuing
beyond these buttresses at both ends is
(a) 1.0 L (b) 2.0 L(c) 0.9 L(d) 0.8 L L is the c/c length of the wall between successive
buttresses.
10.An RCC column of 4 m length is rigidly connected to the slab and to the foundation. Its
cross-section is (400x400) mm². The column will behave is a/an
(a) Long column (b) Short column (c) Intermediate column (d) Linkage
11.If the load acting on a commonly conventional sized RC column increases continuously
from zero to higher magnitudes, the magnitude of the uniaxial ultimate moment that can be
allowed on the column
(a) Increases (b) Decreases (c) Increases and then decreases (d) Remains constant
12.According to IS 456, maximum slenderness ratio for a short concrete column is
(a) Less than 12 (b) Between 12 and 18 (c) Between 18 and 24 (d) More than 24
13.The effective length of a R.C. column continuing through two storeys, properly restrained
at both ends in position and direction, is
(a) 0.50 L (c) L (b) 0.75 L (d) 2L
