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Civil Engineering Quiz | SOM MCQ | Strength of Materials MCQ

1 >>If two forces acting at a joint are not along the straight line, then for the equilibrium of the joint ?
  • (A) forces must be equal and of the same sign
  • (B) forces must be equal in magnitude but opposite in sign
  • (C) one of the forces must be zero
  • (D) each force must be zero
2 >>The minimum number of rivets for the connection of a gusset plate, is ?
  • (A) 1
  • (B) 3
  • (C) 2
  • (D) 4
3 >>If the width of a simply supported beam carrying an isolated load at its centre is doubled, the deflection of the beam at the centre is changed by ?
  • (A) 4
  • (B) 2
  • (C) 43313
  • (D) 43132

4 >>The weakest section of a diamond riveting, is the section which passes through ?
  • (A) second row
  • (B) one rivet hole of end row
  • (C) central raw
  • (D) first row
5 >>The ratio of elongations of a conical bar due to its own weight and that of a prismatic bar of the same length, is ?
  • (A) 43191
  • (B) 43221
  • (C) 43132
  • (D) 43160
6 >>A beam of length L is pinned at both ends and is subjected to a concentrated bending couple of moment M at its centre. The maximum bending moment in the beam is ?
  • (A) M/3
  • (B) M
  • (C) ML/2
  • (D) M/2
7 >>The shape of the bending moment diagram over the length of a beam, carrying a uniformly distributed load is always ?
  • (A) cubical
  • (B) circular
  • (C) linear
  • (D) parabolic
8 >>In a loaded beam, the point of con-traflexture occurs at a section where ?
  • (A) shearing force is maximum
  • (B) bending moment is minimum
  • (C) bending moment is maximum
  • (D) bending moment is zero or changes sign

9 >>If the shear force along a section of a beam is zero, the bending moment at the section is ?
  • (A) average of maximum-minimum
  • (B) maximum
  • (C) minimum
  • (D) zero

10 >>A three-hinged arch is said to be : ?
  • (A) a bent beam
  • (B) statically determinate structure
  • (C) none of these
  • (D) statically indeterminate structure
11 >>The deflection of any rectangular beam simply supported, is ?
  • (A) inversely proportional to the cube of its depth
  • (B) directly proportional to its weight
  • (C) directly proportional to the cube of its length
  • (D) inversely proportional to its width
12 >>The ratio of the maximum deflections of a beam simply supported at its ends with an isolated central load and that of with a uniformly distributed load over its entire length, is ?
  • (A) 43161
  • (B) 1
  • (C) 43160
  • (D) 43134
13 >>The ratio of strengths of solid to hollow shafts, both having outside diameter D and hollow having inside diameter D/2, in torsion, is ?
  • (A) 42370
  • (B) 15/16
  • (C) 43132
  • (D) 43191
14 >>For a simply supported beam with a central load, the bending moment is ?
  • (A) least at the centre
  • (B) maximum at the centre
  • (C) maximum at the supports
  • (D) least at the supports
15 >>The ratio of the moment of inertia of a circular plate and that of a square plate for equal depth, is ?
  • (A) more than one
  • (B) less than one
  • (C) equal to 3Ï€/16
  • (D) equal to one
16 >>The maximum twisting moment a shaft can resist, is the product of the permissible shear stress and ?
  • (A) modulus of rigidly
  • (B) polar modulus
  • (C) moment of inertia
  • (D) polar moment of inertia
17 >>As compared to uniaxial tension or compression, the strain energy stored in bending is only ?
  • (A) 43160
  • (B) 43132
  • (C) 43191
  • (D) 43221
18 >>The slenderness ratio of a vertical column of a square cross-section of 2.5 cm sides and 300 cm length, is ?
  • (A) 416
  • (B) 200
  • (C) 240
  • (D) 360
19 >>The shape of the bending moment diagram over the length of a beam, having no external load, is always ?
  • (A) circular
  • (B) parabolic
  • (C) cubical
  • (D) linear
20 >>Pick up the incorrect statement ?
  • (A) Welded joints provide rigidity
  • (B) Welding takes more time than riveting
  • (C) Welded joints have better finish
  • (D) A welded joint develops strength of its parent metal

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