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Free download in PDF Theory of Structures Multiple Choice Questions with 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.
61
The maximum deflection of a simply supported beam of span L, carrying an isolated load at the centre of the span; flexural rigidity being EI, is
[A]
WL3/3EL
[B]
WL3/8EL
[C]
WL3/24EL
[D]
WL3/48EL
62
In the truss, the force in the member AC is
[A]
6.25 t compressive
[B]
8.75 t tensile
[C]
t tensile
[D]
t compressive
63
In a shaft, the shear stress is not directly proportional to
[A]
Radius of the shaft
[B]
Angle of twistConray380
[C]
Length of the shaft
[D]
Modulus of rigidity
Answer: Length of the shaft
64
The general expression for the B.M. of a beam of length l is the beam carries M = (wl/2) x – (wx²/2)
[A]
A uniformly distributed load w/unit length
[B]
A load varying linearly from zero at one end to w at the other end
[C]
An isolated load at mid span
[D]
None of these
Answer: A uniformly distributed load w/unit length
65
A steel plate d × b is sandwiched rigidly between two timber joists each D × B/2 in section. The steel will be (where Young’s modulus of steel is m times that of the timber).
[A]
BD² + mbd²)/6D]
[B]
BD3 + mbd3)/6D]
[C]
BD² + mbd3)/4D]
[D]
BD² + mbd²)/4D]
66
Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as
[A]
Compound beams
[B]
Indeterminate beams
[C]
Determinate beams
[D]
Composite beams
67
The locus of the moment of inertia about inclined axes to the principal axis, is
[A]
Straight line
[B]
Parabola
[C]
Circle
[D]
Ellipse
68
Shear strain energy theory for the failure of a material at elastic limit, is due to
[A]
Rankine
[B]
Guest or Trecas
[C]
St. Venant
[D]
Von Mises
69
The S.F. diagram of a loaded beam shown in the given figure is that of
[A]
A simply supported beam with isolated central load
[B]
A simply supported beam with uniformly distributed load
[C]
A cantilever with an isolated load at the free end
[D]
A cantilever with a uniformly distributed load
Answer: A cantilever with a uniformly distributed load
70
P = /4L² 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: One end is fixed and other end is free
71
In the truss shown in given figure, the force in member BD is
[A]
100 t compressive
[B]
100 t tensile
[C]
Zero
[D]
Indeterminate
Answer: 100 t compressive
72
A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2 MN/mm2, the tensile force developed at a temperature of 50°C, is
[A]
80 N/mm2
[B]
100 N/mm 2
[C]
120 N/mm2
[D]
150 N/mm2
73
The eccentricity (e) of a hollow circular column, external diameter 25 cm, internal diameter 15 cm for an eccentric load 100 t for non-development of tension, is
[A]
2.75 cm
[B]
3.00 cm
[C]
3.50 cm
[D]
4.25 cm
74
Principal planes are subjected to
[A]
Normal stresses only
[B]
Tangential stresses only
[C]
Normal stresses as well as tangential stresses
[D]
None of these
Answer: Normal stresses only
75
The shape factor of standard rolled beam section varies from
[A]
1.10 to 1.20
[B]
1.20 to 1.30
[C]
1.30 to 1.40
[D]
1.40 to 1.50
76
The locus of the end point of the resultant of the normal and tangential components of the stress on an inclined plane, is
[A]
Circle
[B]
Parabola
[C]
Ellipse
[D]
Straight line
77
In case of principal axes of a section
[A]
Sum of moment of inertia is zero
[B]
Difference of moment inertia is zero
[C]
Product of moment of inertia is zero
[D]
None of these
Answer: Product of moment of inertia is zero
78
Co-efficient of wind resistance of a circular surface, is
[A]
1/2
[B]
1/3
[C]
2/3
[D]
3/2
79
The force in AD of the truss shown in given figure, is
[A]
4.0t compression
[B]
3.0t compression
[C]
0.5t compression
[D]
0.5t tension
80
Pick up the correct statement from the following:
[A]
For a uniformly distributed load, the shear force varies linearly
[B]
For a uniformly distributed load, B.M. curve is a parabola
[C]
For a load varying linearly, the shear force curve is a parabola
[D]
All the above
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