Orrect explanation of a the correct explanation of a

orrect explanation of A
the correct explanation of A
iven figure, the stress in fibre AB
[IES-1995]
.5
x
e



(Compressive)
mly
um
an
W
1
mly
t 1
a
he
]
id
is
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Chapter-6 Bending Stress in Beam S K Mondal’s
(c)
. .5
xx
P P e
A I
 

 
 
(Compressive) (d) P/A (Compressive)
IES-11b . A rectangular strut is 150 mm wide and 120 mm thick. It carries a load of 180 kN at
an eccentricity of 10 mm in a plane bisecting the thickness as shown in the figure:
The maximum intensity of stress in the section will be [IES-2019 Pre.]
(a) 14 MPa (b) 12 MPa (c) 10 MPa (d) 8 MPa
IES-12. A column of square section 40 mm × 40
mm, fixed to the ground carries an
eccentric load P of 1600 N as shown in
the figure.
If the stress developed along the edge
CD is –1.2 N/mm
2
, the stress along the
edge AB will be:
(a) –1.2 N/mm
2
(b) +1 N/mm
2
(c) +0.8 N/mm
2
(d) –0.8 N/mm
2
[IES-1999]
IES-12a. A pull of 100 kN acts on a bar as shown in the figure in such a way that it is
parallel to the bar axis and is 10 mm away from xx: [IES-2019 Pre.]
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Chapter-6 Bending Stress in Beam S K Mondal’s
The maximum bending stress produced in the bar at xx is nearly
(a) 20.5 N/mm
2
(b) 18.8 N/mm
2
(c) 16.3 N/mm
2
(d) 14.5 N/mm
2
IES-13. A short column of symmetric cross-
section made of a brittle material is
subjected to an eccentric vertical load P
at an eccentricity e. To avoid tensile
stress in the short column, the
eccentricity e should be less than or equal
to:
(a) h/12 (b) h/6
(c) h/3 (d) h/2
[IES-2001]
IES-14. A short column of external diameter D and internal diameter d carries an eccentric
load W. Toe greatest eccentricity which the load can have without producing tension
on the cross-section of the column would be: [IES-1999]
2 2 2 2 2 2
(a) (b) (c) (d)
8 8 8 8
    D d D d D d D d
d D
IES-15 The ratio of the core of a rectangular section to the area of the rectangular section
when used as a short column is [IES-2010]
(a)
1
9
(b)
1
36
(c)
1
18
(d)
1
24
Previous 25-Years IAS Questions
Bending equation
IAS-1. Consider the cantilever loaded as shown below: [IAS-2004]
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Chapter-6 Bending Stress in Beam S K Mondal’s
What is the ratio of the maximum compressive to the maximum tensile stress?
(a) 1.0 (b) 2.0 (c) 2.5 (d) 3.0
IAS-2. A 0.2 mm thick tape goes over a frictionless pulley of 25 mm diameter. If E of the
material is 100 GPa, then the maximum stress induced in the tape is: [IAS 1994]
(a)100 MPa (b) 200 MPa (c)400 MPa (d) 800 MPa
Section Modulus
IAS-3. A pipe of external diameter 3 cm and internal diameter 2 cm and of length 4 m is
supported at its ends. It carries a point load of 65 N at its centre. The sectional
modulus of the pipe will be: [IAS-2002]
(a)
3
65
64
cm

(b)
3
65
32
cm

(c)
3
65
96
cm

(d)
3
65
128
cm

IAS-4. A Cantilever beam of rectangular cross-section is 1m deep and 0.6 m thick. If the
beam were to be 0.6 m deep and 1m thick, then the beam would. [IAS-1999]
(a) Be weakened 0.5 times
(b) Be weakened 0.6 times
(c) Be strengthened 0.6 times
(d) Have the same strength as the original beam because the cross-sectional area remainsthe
same
For-2020 (IES,GATE, PSUs) Page 288 of 493 Rev.0