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Theory of Structures Quiz | Theory of Structures Short Questions and Answers

Free download in PDF Theory of Structures Short 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.
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41 The load on a spring per unit deflection, is called
[A] Stiffness
[B] Proof resilience
[C] Proof stress
[D] Proof load
Answer: Stiffness
42 The ratio of circumferential stress to the longitudinal stress in the walls of a cylindrical shell, due to flowing liquid, is
[A] ½
[B] 1
[C] 1½
[D] 2
Answer: 2
43 The forces acting normally on the cross section of a bar shown in the given figure introduce
[A] Compressive stress
[B] Tensile stress
[C] Shear stress
[D] None of these
Answer: Tensile stress
44 Pick up the incorrect statement from the following: The torsional resistance of a shaft is directly proportional to
[A] Modulus of rigidity
[B] Angle of twist
[C] Reciprocal of the length of the shaft
[D] Moment of inertia of the shaft section
Answer: Moment of inertia of the shaft section
45 A body is said to be in equilibrium if
[A] It moves horizontally
[B] It moves vertically
[C] It rotates about its C.G.
[D] None of these
Answer: None of these
46 Gradually applied static loads do not change with time their
[A] Magnitude
[B] Direction
[C] Point of application
[D] All the above
Answer: All the above
47 The forces acting on the bar as shown in the given figure introduce
[A] Compressive stress
[B] Tensile stress
[C] Shear stress
[D] None of these
Answer: Shear stress
48 If E, N, K and 1/m are modulus of elasticity, modulus of rigidity. Bulk modulus and Poisson ratio of the material, the following relationship holds good
[A] E = 3K (1 – 2/m)
[B] E = 2N (1 + 1/m)
[C] (3/2)K (1 – 2/m) = N (1 + 1/m)
[D] All the above
Answer: All the above
49 A simply supported beam carries varying load from zero at one end and w at the other end. If the length of the beam is a, the maximum bending moment will be
[A] wa/27
[B] wa²/27
[C] w²a
[D] wa²
Answer: wa²
50 If Ix and Iy are the moments of inertia of a section about X and Y axes, the polar moment of inertia of the section, is
[A] (IX + IY)/2
[B] (IX – IY)/2
[C] IX + IY
[D] (I /I )
Answer: IX + IY
51 The yield moment of a cross section is defined as the moment that will just produce the yield stress in
[A] The outer most fibre of the section
[B] The inner most fibre of the section
[C] The neutral fibre of the section
[D] The fibre everywhere
Answer: The outer most fibre of the section
52 In case of a simply supported I-section beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is
[A] L/2
[B] L/3
[C] L/4
[D] L/5
Answer: L/5
53 The ratio of lateral strain to axial strain of a homogeneous material, is known
[A] Yield ratio
[B] Hooke’s ratio
[C] Poisson’s ratio
[D] Plastic ratio
Answer: Poisson’s ratio
54 A short column (30 cm × 20 cm) carries a load P 1 at 4 cm on one side and another load P2at 8 cm on the other side along a principal section parallel to longer dimension. If the extreme intensity on either side is same, the ratio of P1 to P2 will be
[A] 2/3
[B] 3/2
[C] 8/5
[D] 5/8
Answer: 8/5
55 The force in BF of the truss shown in given figure, is
[A] 4t tension
[B] 4t compression
[C] 4.5t tension
[D] 4.5t compression
Answer: 4.5t compression
56 For beams breadth is constant,
[A] Depth d M
[B] Depth d 3
[C] Depth d
[D] Depth d 1/M
Answer: Depth d 3
57 The ratio of maximum shear stress to average shear stress of a circular beam, is
[A] 2/3
[B] 3/2
[C] 3/4
[D] 4/3
Answer: 4/3
58 For calculating the permissible stress 0 y /[(1 + a(l/r)²] is the empirical formula, known as
[A] Straight line formula
[B] Parabolic formula
[C] Perry’s formula
[D] Rankine’s formula
Answer: Rankine’s formula
59 Pick up the correct statement from the following:
[A] In a loaded beam, the moment at which the first yield occurs is called yield moment
[B] In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment
[C] In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area
[D] All the above
Answer: All the above
60 For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is
[A] 0.303
[B] 0.404
[C] 0.505
[D] 0.707
Answer: 0.707
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