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Quiz 3
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Q.1
Number of unknown internal forces in each member of a rigid jointed plane frame is
1
2
3
6
Q.2
Principle of superposition is applicable when
Deflections are linear functions of applied forces
Material obeys Hooke's law
The action of applied forces will be affected by small deformations of the structure
None of the above
Q.3
Castigliano’s first theorem is applicable
for statically determinate structures only
when the system behaves elastically
only when principle of superposition is valid
none of the above
Q.4
When a uniformly distributed load, longer than the span of the girder, moves from left to right, then the maximum bending moment at mid section of span occurs when the uniformly distributed load occupies
Less than the left half span
Whole of left half span
More than the left half span
Whole span
Q.5
A load W is moving from left to right support on a simply supported beam of span T. The maximum bending moment at 0.4 1 from the left support is
0.16 Wl
0.20 Wl
0.24 Wl
0.25 Wl
Q.6
Which of the following is not the displacement method?
Equilibrium method
Column analogy method
Moment distribution method
Kani's method
Q.7
The deflection at any point of a perfect frame can be obtained by applying a unit load at the joint in
Vertical direction
Horizontal direction
Inclined direction
The direction in which the deflection is required
Q.8
The Castigliano's second theorem can be used to compute deflections
In statically determinate structures only
For any type of structure
At the point under the load only
For beams and frames only
Q.9
The degree of static indeterminacy up to which column analogy method can be used is
2
3
4
unrestricted
Q.10
In moment distribution method, the sum of distribution factors of all the members meeting at any joint is always
zero
less than 1
1
greater than 1
Q.11
For a single point load W moving on a symmetrical three hinged parabolic arch of span L, the maximum sagging moment occurs at a distance x from ends. The value of x is
0.211 L
0.25 L
0.234 L
0.5 L
Q.12
Pick up the correct statement applicable to cased columns.
Single I-beam or channels back with or without flange plates may be used
The surface and edges of the steel column should be provided a concrete cover not less than 50 mm
All the above
Q.13
In column analogy method, the area of an analogous column for a fixed beam of span L and flexural rigidity El is taken as
L/EI
L/2EI
L/3EI
L/4EI
Q.14
For under water concreting.
At least 10 percent more cement is required as compared to dry conditions
The volume of coarse aggregates shall not be less than one and half times and not more than twice that of fine aggregate
De-watering by pumping is not done or until 24 hours thereafter
All the above
Q.15
The effective and actual lengths of a cantilever are same if continuous at the support,
Unstrained against torsion at the support and free at the end
With partial restraint against torsion of the support and free at the end
Restrained against torsion at the support and free at the end
None of these
Q.16
Which of the following methods of structural analysis is a force method?
Slope deflection method
Column analogy method
Moment distribution method
None of the above
Q.17
The degree of static indeterminacy of a rigid-jointed space frame is (where m, r and j have their usual meanings)
m + r – 2j
m + r – 3j
3m + r – 3j
6m + r – 6j
Q.18
The degree of kinematic indeterminacy of a pin-jointed space frame is (where m, r and j have their usual meanings)
2j-r
3j-r
j-2r
j-3r
Q.19
The carryover factor in a prismatic member whose far end is fixed is
0
1/2
3/4
1
Q.20
Which of the following methods of structural analysis is a displacement method?
Moment distribution method
Column analogy method
Three moment equation
None of the above
Q.21
The degree of static indeterminacy of a pin-jointed space frame is given by (where m is number of unknown member forces, r is unknown reaction components and j is number of joints)
m + r – 2j
m + r – 3j
3m + r – 3j
m + r + 3j
Q.22
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
Change from compression to tension
Change from tension to compression
Always be compression
Always be tension
Q.23
A pin-jointed plane frame is unstable if (where m is number of members, r is reaction components and j is number of joints)
(m + r)
m + r = 2j
(m + r)>2j
none of the above
Q.24
A rigid-jointed plane frame is stable and statically determinate if (where m is number of members, r is reaction components and j is number of joints)
(m + r) = 2j
(m + r) = 3j
(3m + r) = 3j
(m + 3r) = 3j
Q.25
If in a pin-jointed plane frame (m + r) > 2j, then the frame is (Where ‘m’ is number of members, ‘r’ is reaction components and ‘j’ is number of joints)
Stable and statically determinate
Stable and statically indeterminate
Unstable
None of the above
Q.26
A single rolling load of 8 kN rolls along a girder ofm span. The absolute maximum bending moment will be
8 kN.m
15 kN.m
30 kN.m
60 kN.m
Q.27
The minimum horizontal distance between two parallel main reinforcing bars, is
The diameter of the bar if their diameters are same
The diameter of the longer bar if their diameters are unequal
5 mm more than nominal maximum size of the coarse aggregate
Greatest value of the above
Q.28
Bending moment at any section in a conjugate beam gives in the actual beam
slope
curvature
deflection
bending moment
Q.29
The three moments equation is applicable only when
The beam is prismatic
There is no settlement of supports
There is no discontinuity such as hinges within the span
The spans are equal
Q.30
To generate the j th column of the flexibility matrix
a unit force is applied at coordinate j and the displacements are calculated at all coordinates
a unit displacement is applied at co-ordinate j and the forces are calculated at all coordinates
a unit force is applied at coordinate j and the forces are calculated at all coordinates
a unit displacement is applied at co-ordinate j and the displacements are calculated at all co-ordinates
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