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Free download in PDF Theory of Structures Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
P = / L² is the equation for Euler’s crippling load if
[A]
Both the ends are fixed
[B]
Both the ends are hinged
[C]
One end is fixed and other end is free
[D]
One end is fixed and other end is hinged
Answer: Both the ends are hinged
(2)
The force in BC of the truss shown in the given figure, is
[A]
3.0 t compression
[B]
3.0 t tension
[C]
t tension
[D]
t compression
(3)
If a three hinged parabolic arch, (span l, rise h) is carrying a uniformly distributed load w/unit length over the entire span,
[A]
Horizontal thrust is wl2/8h
[B]
S.F. will be zero throughout
[C]
B.M. will be zero throughout
[D]
All the above
(4)
Pick up the correct statement from the following:
[A]
For channels, the shear centre does not coincide its centroid
[B]
The point of intersection of the bending axis with the cross section of the beam, is called shear centre
[C]
For I sections, the shear centre coincides with the centroid of the cross section of the beam
[D]
All the above
(5)
A cantilever of length is subjected to a bending moment at its free end. If EI is the flexural rigidity of the section, the deflection of the free end, is
[A]
ML/EI
[B]
ML/2EI
[C]
ML²/2EI
[D]
ML²/3EI
(6)
Maximum shear stress theory for the failure of a material at the elastic limit, is known
[A]
Guest’s or Trecas’ theory
[B]
St. Venant’s theory
[C]
Rankine’s theory
[D]
Haig’s theory
Answer: Guest’s or Trecas’ theory
(7)
The ratio of the stresses produced by a suddenly applied load and by a gradually applied load on a bar, is
[A]
1/4
[B]
1/2
[C]
1
[D]
2
(8)
A close coil helical spring when subjected to a moment M having its axis along the axis of the helix
[A]
It is subjected to pure bending
[B]
Its mean diameter will decrease
[C]
Its number of coils will increase
[D]
All the above
Answer: It is subjected to pure bending
(9)
Slenderness ratio of a long column, is
[A]
Area of cross-section divided by radius of gyration
[B]
Area of cross-section divided by least radius of gyration
[C]
Radius of gyration divided by area of cross-section
[D]
Length of column divided by least radius of gyration
Answer: Length of column divided by least radius of gyration
(10)
Maximum strain theory for the failure of a material at the elastic limit, is known as
[A]
Guest’s or Trecas’ theory
[B]
St. Venant’s theory
[C]
Rankine’s theory
[D]
Haig’s theory
Answer: St. Venant’s theory
(11)
A shaft subjected to a bending moment M and a torque T, experiences
[A]
Maximum bending stress = 32M d3
[B]
Maximum shear stress = 16 T d3
[C]
Both A. and B.
[D]
Neither A. nor B.
(12)
A composite beam is composed of two equal strips one of brass and other of steel. If the temperature is raised
[A]
Steel experiences tensile force
[B]
Brass experiences compressive force
[C]
Composite beam gets subjected to a couple
[D]
All the above
(13)
Pick up the correct statement from the following:
[A]
The moment of inertia is calculated about the axis about which bending takes place
[B]
If tensile stress is less than axial stress, the section experiences compressive stress
[C]
If tensile stress is equal to axial stress, the section experiences compressive stress
[D]
All the above
(14)
Maximum principal stress theory for the failure of a material at elastic point, is known
[A]
Guest’s or Trecas’ theory
[B]
St. Venant’s theory
[C]
Rankine’s theory
[D]
Von Mises’ theory
(15)
0y/n [1 – a (1/r)²]is the empirical formula,For calculating the allowable stress of long columns known as
[A]
Straight line formula
[B]
Parabolic formula
[C]
Perry’s formula
[D]
Rankine’s formula
Answer: Parabolic formula
(16)
Pick up the correct statement from the following:
[A]
The structural member subjected to compression and whose dimensions are small as
[B]
compared to its length, is called a stmt the vertical compression members are generally known as columns or stanchions
[C]
Deflection in lateral direction of a long column, is generally known as buckling
[D]
All the above
(17)
P=4²EI/L² is the equation of Euler’s crippling load if
[A]
Both the ends are fixed
[B]
Both the ends are hinged
[C]
One end is fixed and other end is free
[D]
One end is fixed and other end is hinged
Answer: Both the ends are fixed
(18)
The degree of indeterminacy of the frame in the given figure, is
[A]
Zero
[B]
1
[C]
2
[D]
3
(19)
The forces in the members of simple trusses, may be analysed by
[A]
Graphical method
[B]
Method of joints
[C]
Method of sections
[D]
All the above
(20)
A simply supported beam A carries a point load at its mid span. Another identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be
[A]
2/3
[B]
3/2
[C]
5/8
[D]
8/5
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