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MCQs

Total Questions : 605 | Page 8 of 61 pages
Question 71. A rolled steel joist is simply supported at its ends and carries a uniformly distributed load which causes a maximum deflection of 10 mm and slope at the ends of 0.002 radian. The length of the joist will be,
  1.    10 m
  2.    12 m
  3.    14 m
  4.    16 m
 Discuss Question
Answer: Option D. -> 16 m
Question 72. The stiffness of the close coil helical spring is
  1.    d4N/8D3n
  2.    d4N/4D3n
  3.    4D3N/d4n
  4.    8D3N/d4n
 Discuss Question
Answer: Option A. -> d4N/8D3n
Question 73. Pick up the correct statement from the following:
  1.    In a loaded beam, the moment at which the first yield occurs is called yield moment
  2.    In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment
  3.    In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 74. Maximum strain theory for the failure of a material at the elastic limit, is known as
  1.    Guest's or Trecas' theory
  2.    St. Venant's theory
  3.    Rankine's theory
  4.    Haig's theory
 Discuss Question
Answer: Option B. -> St. Venant's theory
Question 75. A body is said to be in equilibrium if
  1.    It moves horizontally
  2.    It moves vertically
  3.    It rotates about its C.G.
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 76. A close coil helical spring of mean diameter D consists of n coils of diameter d. If it carries an axial load W, the energy stored in the spring, is
  1.    4WD²n/d4N
  2.    4W²Dn/d4N
  3.    4W²D3n/d4N
  4.    4W²D3n²/d4N
 Discuss Question
Answer: Option C. -> 4W²D3n/d4N
Question 77. A two hinged parabolic arch of span l and rise h carries a load varying from zero at the left end to ? per unit run at the right end. The horizontal thrust is
  1.    ωl²/4h
  2.    ωl²/8h
  3.    ωl²/12h
  4.    ωl²/16h
 Discuss Question
Answer: Option D. -> ωl²/16h
Question 78. Inertia of a rectangular section of width and depth about an axis passing the moment of through C.G. and parallel to its width is
  1.    BD²/6
  2.    BD³/6
  3.    BD³/12
  4.    B²D/6
 Discuss Question
Answer: Option C. -> BD³/12
Question 79. The ratio of moments of inertia of a triangular section about its base and about a centroidal axis parallel to its base, is
  1.    1.0
  2.    1.5
  3.    2.0
  4.    3.0
 Discuss Question
Answer: Option D. -> 3.0
Question 80. The maximum deflection due to a load W at the free end of a cantilever of length L and having flexural rigidity EI, is
  1.    WL²/2EI
  2.    WL²/3EI
  3.    WL3/2EI
  4.    WL3/3EI
 Discuss Question
Answer: Option D. -> WL3/3EI

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