Structural Analysis 50 Questions with Answers
1.
An Statically indeterminate building frame may
be converted to a statically determine one by assuming
A.
Hinges
at mid-height
B.
Hinges at the mid-span of the beams
C.
Hinges at both mid-height of columns and mid-span of
beams
D.
One support as fixed at base and other support on
rollers
Answer: Option C
2.
A
statically determinate structure
A. Cannot be analyzed without the
correct knowledge of modulus of elasticity
B.
Must
necessarily have roller support at one of its ends
C.
Requires
only statical equilibrium equations for its analysis
Answer: Option C
3.
A
statically indeterminate structure is the one which
A. Cannot be analyzed at all
B.
Can
be analyzed using equations of statics only
C.
Can
be analyzed using equations of statics and compatibility equations
D.
Can
be analyzed using equations of compatibility only
Answer: Option C
4.
If
the axial deformation is neglected, What is the Kinematic indeterminacy of a
single bay portal frame fixed at base?
A.
2 B. 3
C.
4 D. 6
Answer: Option B
5.
The
number of independent equations to be satisfied for static equilibrium in a
space structure is
A.
3 B. 3
C.
4 D. 6
Answer: Option B
6.
The
maximum bending moment at the left quarter point of a simple beam due to
crossing of UDL of length shorter than the span in the direction left to right,
would occur after the load had just crossed the section by
A. One-fourth of its length
B.
Half
of its length
C.
Three-fourth
of its length
D.
Its
full length
Answer: Option C
7.
When
a load crosses a through type pratt truss in the direction left to right, the nature
of force in any diagonal member in the left half of the span would
A.
Change from compression to tension
B.
Change from tension to compression
C.
Always be compression
D.
Always be tension
Answer: Option C
8.
What
is the shape of influence line diagram for the maximum bending moment in
respect of a simply supported beam?
A.
Rectangular
B.
Triangular
C.
Parabolic
D.
Circular
Answer: Option C
9.
What
is the variation of influence line for stress function in a statically determinate
structure?
A. Parabolic
B. Bilinear
C. Linear
D. Uniformly rectangular
Answer: Option C
10.
Muller-Breslau principle is applicable to get
influence line for which one of the following?
A. Reaction at the ends of a
simple beam
B.
Bending
moment at a section
C.
Shear
force at a section
D.
Forces
and moments at any section
Answer: Option C
11.
What is the area of influence line diagram for
the reaction at the hinged end of a uniform propped cantilever beam of span L?
A.
L/8 B. L/2
C.
L/4 D. 3L/8
Answer: Option C
12.
A uniformly distributed load (W) of length
shorter than the span crosses a girder. The bending moment at a section in
girder will be maximum when
A. Head of the load is at the
section
B.
Tail
of the load is at the section
C.
Section
divides the load in the same ratio as it divide the span
D.
Section
divides the load in two equal length
Answer: Option C
13.
The
Muller-Breslau principle in structural analysis is used for
A. Drawing influence line diagram
for any force function
B.
Superimposition
of load effects
C.
Writing
virtual work equation
D.
None
of above
Answer: Option A
14.
The
maximum number of unknown forces that can be determined in a concurrent
coplanar force system under equilibrium is
A.
2 B. 3
C.
6 D. 1
Answer: Option A
15.
The
area of influence diagram for the reaction at the hinged end of a uniform
propped propped cantilever beam of span l
is
A.
3l/8
B. l/2
C.
l/4 D. l/8
Answer: Option C
16.
The Muller-Breslau principle for influence
line is applicable for
A. Simple beams
B.
Continuous
beams
C.
Redundant
trusses
D.
All
of the above
Answer: Option D
17.
The maximum bending moment caused by a set of
concentrated moving loads is
A. Always at the mid-point of
span
B.
Between
the mid-point and concentrated load next to the mid-point of the span
C.
Not
definable
D.
Always
under a load close to the centroid of the set of loads
Answer: Option D
18.
A
three-hinged parabolic arch rib of span L and crown rise ‘h’ carries a uniformly distributed superimposed
load of intensity ‘w’ per unit length. The hinges are located on two abutments
at the same level and the third hinge at a quarter span location from left hand
abutment. The horizontal thrust on the abutment is
A.
wL2/4h B. wL2/6h
C.
wL2/8h D. wL2/6h
Answer: Option C
19.
A two- hinged semicircular arch of radius R
carries a concentrated load W at the crown. The horizontal thrust is
A.
W/2Ï€
B. W/Ï€
C.
2W/3Ï€ D. 4W/3Ï€
Answer: Option B
20.
A three-hinged semicircular arch of radius R
carries a uniformly distributed load w per unit run over the whole span. The
horizontal thrust is
A.
wR
B. wR/2
C.
4wR/3Ï€ D. 2wR/3Ï€
Answer: Option B
21.
A three-hinged semi-circular arch of radius R
carries a concentrated load W at the crown. Horizontal thrust acting on the
arch at the things would be
A.
W/2
B. W/2Ï€
C.
2/3 W D. 4W/3Ï€
Answer: Option A
22.
Linear arch is one which represents
A. Centre line of an arch
B.
Variation
of bending moment
C.
Thrust
line
D.
Variation
of shear force
Answer: Option C
23.
A suspension bridge with a two-hinged
stiffening girder is
A. Statically determine
B.
Indeterminate
of one degree
C.
Indeterminate
of two degree
D.
A
mechanism
Answer: Option B
24.
A suspension bridge with at two-hinged
stiffening girder is statically
A. Determinate
B. Indeterminate to 1 degree
C. Indeterminate to 2 degree
D. Indeterminate to 3 degree
Answer: Option B
25.
A three-hinged parabolic arch of span ‘l’ and rise ‘h’ subjected to a u.d.l. of intensity ‘w’. then the horizontal
thrust at the supports is
A.
wl2/8h
B. wl/h
C.
wl/8h2 D. whl/8
Answer: Option A
26.
When
a two-hinged parabolic arch is subjected to a rise in ambient temperature, the
horizontal thrust at the support will
A. Increase
B.
Decrease
C.
Remain
same
D.
Increase
or decrease depending on the span
Answer: Option A
27.
Due to some point load anywhere on a fixed
beam, the maximum free bending moment is M. The sum of fixed end moment is
A.
M B. 1.5 M
C. 2.0 M D. 3.0 M
Answer: Option A
28.
A fixed beam of uniform section is carrying a
point load at its midspan. If the moment of inertia of the middle half length
is now reduced to half its previous value, then the fixed end moments will
A. Increase
B.
Decrease
C.
Remain
constant
D.
Change
their directions
Answer: Option A
29.
A uniform beam of span L is rigidly fixed at
both supports. It carries a uniformly distributed load ‘w’ per unit length. The
bending moment at mid span is
A.
wL2/8
B. wL2/12
C.
wL2/16 D. wL2/24
Answer: Option D
30.
Claypeyron’s theorem is applied to
A. Simply supported beam
B.
Propped
cantilever beam
C.
Fixed
and continuous beam
D.
Continuous
beam only
Answer: Option C
31.
A beam is hinged at end A and fixed at B. A
moment M is applied at end A. What is the moment developed at end B?
A.
–M B. M
C.
M/2 D. –M/2
Answer: Option C
32.
Which one of the following statement is
correct?
A. In slope-deflection method,
the force are taken as unknowns
B.
In
slope-deflection method, the joint rotations are taken as unknowns
C.
Slope-deflection
method is not applicable for beams and frames having settlement at the
supports.
D.
Slope-deflection
method is also known as force method.
Answer: Option B
33.
The displacement method is also referred to as
which one of the following?
A. Minimum strain energy method
B.
Maxwell-Mohr
method
C.
Consistent
deformation method
D.
Slope-deflection
method
Answer: Option D
34.
A beam carries a uniformly distributed load
throughout is length. In which of the following configuration will the strain
energy be maximum?
A. Cantilever
B.
Simply
supported beam
C.
Propped
cantilever
D.
Fixed
Answer: Option A
35.
What is the ratio of load carrying capacity of
a fixed beam to that of a cantilever beam of same span, having same maximum
distributed load throughout the span?
A.
6
B. 4
C.
3 D. 2
Answer: Option A
36.
When a load is applied to a structure with
rigid joints
A. There is no rotation or
displacement of joint
B.
There
is no rotation of joint
C.
There
is no displacement of joint
D.
There
can be rotation and displacement of joint but the angle between the members
connected to the joint remains same even after application of the load.
Answer: Option D
37.
By which one of the following method, an
approximate quick solution possible for frames subjected to transverse loads?
A. By cantilever or portal method
B.
By
strain energy method
C.
By
moment distribution method
D.
By
matrix method
Answer: Option A
38.
A fixed end beam of uniform cross-section is
loaded uniformly throughout the span. What is the proportion of the bending
moment at the center to the end moment considering only elastic conditions?
A.
1 : 1 B. 1 : 3
C. 1 : 4 D. 2 : 3
Answer: Option B
39.
A fixed beam with central point load undergoes
a slight settlement at one end.
Select
suitable answer from the following :
A. Moment induced at both ends
will be same
B.
Moment
induced at the end that has undergoes settlement will be maximum
C.
Moment
induced will be maximum at the end having no settlement
D.
Zero
moment at the end that has settled.
Answer: Option C
40.
An increase in temperature on the top fiber of
a simply supported beam will cause
A. Downward deflection
B.
Upward
deflection
C.
No
deflection
D.
Angular
rotation about neutral axis
Answer: Option B
41.
A propped cantilever beam AB of span L is
subjected to a moment M at the prop end B. The moment at fixed end A is
A.
2 M
B. M/2
C. M D. 3M/4
Answer: Option B
42.
The moment-distribution method in structural
analysis falls in the category of
A. Displacement method
B. Force
method
C. Flexibility
method
D. First
order approximate method
Answer: Option A
43.
Clockwise moments are applied to both the ends
of a uniform simply supported beam. If the ratio of the rotation of two ends is
2, then the ratio of the applied moments will be
A.
5/4
B. 7/5
C.
5/3 D. 3/2
Answer: Option A
44.
The force required produce a unit displacement
at either one-third point of a fixed beam of span l and of uniform flexural rigidity EI is
A.
729EI/l3 B. 724EI/l3
C. 724EI/3l3 D. 729EI/2l3
Answer: Option D
45.
Force method in structural analysis always
ensures
A. Compatibility of deformation
B.
Equilibrium
of forces
C.
Kinematically
admissible strains
D.
Overall
safety
Answer: Option (A, B)
46.
Which one of the following methods is not
classified as a Force Method?
A. The Theorem of Three Moments
B.
The
Moment Distribution Method
C.
The
Method of Consistent Deformation
D.
Castigliano,s
Theorem
Answer: Option B
47.
Carry-over factor at a support/end is defined
as
A. Modulus of Elasticity EI
B.
The
ratio of moment produced at the far end to the applied moment at that support
end
C.
The
value of the moment to be applied to that end to cause a local slope of one
radian
D.
2EK
Answer: Option B
48.
In the slope-deflection equations,
deformations are considered to be caused by
A. Shear force and bending
moments by
B.
Axial
forces, shear forces and bending moments
C.
Axial
forces and bending moments only
D.
Bending
moments only
Answer: Option D
49.
A single-bay portal frame of height h fixed at
the base is subjected to a horizontal displacement D at the top. With constant
EI, the base moment developed is proportional to
A.
1/h
B. 1/h2
C.
1/h3 D. 1/h4
Answer: Option B
50.
What does the Williot-Mohr diagram yield?
A. Forces in members of a truss
B.
Moment
in a fixed beam
C.
Reactions
at the supports
D.
Joint
displacement of a pin jointed plane frame
Answer: Option B
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