Structural Analysis MCQ

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• In moment distribution method, the sum of distribution factors of all the members meeting at any joint is always
  ক

  Zero

  খ

  Less than 1

  গ

  1

  ঘ

  Greater than 1
• For under water concreting.
  ক

  At least 10 percent more cement is required as compared to dry conditions

  খ

  The volume of coarse aggregates shall not be less than one and half times and not more than twice that of fine aggregate

  গ

  De-watering by pumping is not done or until 24 hours thereafter

  ঘ

  All the above
• In column analogy method, the area of an analogous column for a fixed beam of span L and flexural rigidity E$$I$$ is taken as
  ক

  $$\frac{{\text{L}}}{{{\text{E}}I}}$$

  খ

  $$\frac{{\text{L}}}{{2{\text{E}}I}}$$

  গ

  $$\frac{{\text{L}}}{{3{\text{E}}I}}$$

  ঘ

  $$\frac{{\text{L}}}{{4{\text{E}}I}}$$
• Pick up the correct statement applicable to cased columns.
  ক

  Single I-beam or channels back with or without flange plates may be used

  খ

  The overall dimensions of the steel section do not exceed 750 × 450 mm over plate if used

  গ

  The column is unpainted and is solidly encased in ordinary dense concrete with 10 mm aggregates having a minimum of cube strength 160 kg/cm² at 28 days

  ঘ

  The surface and edges of the steel column should be provided a concrete cover not less than 50 mm

  ঙ

  All the above
• If in a rigid-jointed space frame, (6m + r)
  ক

  Unstable

  খ

  Stable and statically determinate

  গ

  Stable and statically indeterminate

  ঘ

  None of the above
• For a single point load W moving on a symmetrical three hinged parabolic arch of span L, the maximum sagging moment occurs at a distance x from ends. The value of x is
  ক

  0.211 L

  খ

  0.25 L

  গ

  0.234 L

  ঘ

  0.5 L
• When a uniformly distributed load, longer than the span of the girder, moves from left to right, then the maximum bending moment at mid section of span occurs when the uniformly distributed load occupies
  ক

  Less than the left half span

  খ

  Whole of left half span

  গ

  More than the left half span

  ঘ

  Whole span
• The effective and actual lengths of a cantilever are same if continuous at the support,
  ক

  Unstrained against torsion at the support and free at the end

  খ

  With partial restraint against torsion of the support and free at the end

  গ

  Restrained against torsion at the support and free at the end

  ঘ

  None of these
• Principle of superposition is applicable when
  ক

  Deflections are linear functions of applied forces

  খ

  Material obeys Hooke's law

  গ

  The action of applied forces will be affected by small deformations of the structure

  ঘ

  None of the above
• Castigliano’s first theorem is applicable
  ক

  For statically determinate structures only

  খ

  When the system behaves elastically

  গ

  Only when principle of superposition is valid

  ঘ

  None of the above
• The degree of static indeterminacy of a rigid-jointed space frame is (where m, r and j have their usual meanings)
  ক

  m + r - 2j

  খ

  m + r - 3j

  গ

  3m + r - 3j

  ঘ

  6m + r - 6j
• The degree of kinematic indeterminacy of a pin-jointed space frame is (where m, r and j have their usual meanings)
  ক

  2j - r

  খ

  3j - r

  গ

  j - 2r

  ঘ

  j - 3r
• The carryover factor in a prismatic member whose far end is fixed is
  ক

  0

  খ

  $$\frac{1}{2}$$

  গ

  $$\frac{3}{4}$$

  ঘ

  1
• Which of the following methods of structural analysis is a displacement method?
  ক

  Moment distribution method

  খ

  Column analogy method

  গ

  Three moment equation

  ঘ

  None of the above
• Which of the following is not the displacement method?
  ক

  Equilibrium method

  খ

  Column analogy method

  গ

  Moment distribution method

  ঘ

  Kani's method
• The number of independent equations to be satisfied for static equilibrium in a space structure is
  ক

  2

  খ

  3

  গ

  4

  ঘ

  6
• When a load crosses a through type Pratt truss in the direction left to right, the nature of force in any diagonal member in the left half of the span would
  ক

  Change from compression to tension

  খ

  Change from tension to compression

  গ

  Always be compression

  ঘ

  Always be tension
• The degree of static indeterminacy up to which column analogy method can be used is
  ক

  2

  খ

  3

  গ

  4

  ঘ

  Unrestricted
• The degree of static indeterminacy of a pin-jointed space frame is given by (where m is number of unknown member forces, r is unknown reaction components and j is number of joints)
  ক

  m + r - 2j

  খ

  m + r - 3j

  গ

  3m + r - 3j

  ঘ

  m + r + 3j
• A pin-jointed plane frame is unstable if (where m is number of members, r is reaction components and j is number of joints)
  ক

  [ <p><span>A. (m + r) <p><span>B. (m + r) = 2j

  খ

  (m + r) &gt; 2j

  গ

  None of the above
• A rigid-jointed plane frame is stable and statically determinate if (where m is number of members, r is reaction components and j is number of joints)
  ক

  (m + r) = 2j

  খ

  (m + r) = 3j

  গ

  (3m + r) = 3j

  ঘ

  (m + 3r) = 3j
• If in a pin-jointed plane frame (m + r) &gt; 2j, then the frame is <br>(Where ‘m’ is number of members, ‘r’ is reaction components and ‘j’ is number of joints)
  ক

  Stable and statically determinate

  খ

  Stable and statically indeterminate

  গ

  Unstable

  ঘ

  None of the above
• A single rolling load of 8 kN rolls along a girder of 15 m span. The absolute maximum bending moment will be
  ক

  8 kN-m

  খ

  15 kN-m

  গ

  30 kN-m

  ঘ

  60 kN-m
• The minimum horizontal distance between two parallel main reinforcing bars, is
  ক

  The diameter of the bar if their diameters are same

  খ

  The diameter of the longer bar if their diameters are unequal

  গ

  5 mm more than nominal maximum size of the coarse aggregate

  ঘ

  Greatest value of the above
• Bending moment at any section in a conjugate beam gives in the actual beam
  ক

  Slope

  খ

  Curvature

  গ

  Deflection

  ঘ

  Bending moment
• The Castigliano's second theorem can be used to compute deflections
  ক

  In statically determinate structures only

  খ

  For any type of structure

  গ

  At the point under the load only

  ঘ

  For beams and frames only
• The three moments equation is applicable only when
  ক

  The beam is prismatic

  খ

  There is no settlement of supports

  গ

  There is no discontinuity such as hinges within the span

  ঘ

  The spans are equal
• To generate the j^th column of the flexibility matrix
  ক

  A unit force is applied at coordinate j and the displacements are calculated at all co-ordinates

  খ

  A unit displacement is applied at co-ordinate j and the forces are calculated at all co-ordinates

  গ

  A unit force is applied at coordinate j and the forces are calculated at all co-ordinates

  ঘ

  A unit displacement is applied at co-ordinate j and the displacements are calculated at all co-ordinates
• The number of independent equations to be satisfied for static equilibrium of a plane structure is
  ক

  1

  খ

  2

  গ

  3

  ঘ

  6
• The deformation of a spring produced by a unit load is called
  ক

  Stiffness

  খ

  Flexibility

  গ

  Influence coefficient

  ঘ

  Unit strain