Structural Mechanics Set 2

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This set of Structural Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Structural Mechanics Set 2

Q1 | Columns of given length, cross-section and material have different values of buckling loads for different end conditions. The strongest column is one whose
  • one end is fixed and other end is hinged
  • both ends are hinged or pin jointed
  • one end is fixed and the other end entirely free
  • both the ends are fixed
Q2 | The slenderness ratio of a vertical column of square cross- section of 10 cm side and 500 cm long, is
  • 117.2
  • 17.3
  • 173.2
  • 137.2
Q3 | The equivalent length of a column fixed at one end and free at the other end, is
  • 0.5L
  • 0.7L
  • L
  • 2L
Q4 | The radius of gyration of a squar section is not proportional to
  • square root of the moment of inertia
  • square root of the inverse of the area
  • square root of the moment of inertia divided by area of the section
  • side of squar
Q5 | The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose ends are hinged, is 5 m. If the value of E for the material is 2100 kN/cm2, the permissible maximum crippling load will be
  • 1.288 kN
  • 12.88 kN
  • 128.8 kN
  • 288.0 kN
Q6 | A sudden increase or decrease in shear force diagram between any two points indicates that there is
  • No loading between the two points
  • Point loads between the two points
  • U.D.L. between the two points
  • None of these
Q7 | A beam is a structural member which is subjected to
  • Axial tension or compression
  • Transverse loads and couples
  • Twisting moment
  • No load, but its axis should be horizontal and x-section rectangular or circular
Q8 | Which of the following are statically determinate beams?
  • Only simply supported beams
  • Cantilever, overhanging and simply supported
  • Fixed beams
  • Continuous beams
Q9 | A cantilever is a beam whose
  • Both ends are supported either on rollers or hinges
  • One end is fixed and other end is free
  • Both ends are fixed
  • Whose both or one of the end has overhang
Q10 | In a cantilever carrying a uniformly varying load starting from zero at the free end, the shear force diagram is
  • A horizontal line parallel to x-axis
  • A line inclined to x-axis
  • Follows a parabolic law
  • Follows a cubic law
Q11 | In a cantilever carrying a uniformly varying load starting from zero at the free end, the Bending moment diagram is
  • A horizontal line parallel to x-axis
  • A line inclined to x-axis
  • Follows a parabolic law
  • Follows a cubic law
Q12 | In a simply supported beam, bending moment at the end
  • Is always zero if it does not carry couple at the end
  • Is zero, if the beam has uniformly distributed load only
  • Is zero if the beam has concentrated loads only
  • May or may not be zero
Q13 | For any part of the beam, between two concentrated load Shear force diagram is a
  • Horizontal straight line
  • Vertical straight line
  • Line inclined to x-axis
  • Parabola
Q14 | For any part of a beam between two concentrated load, Bending momentdiagram is a
  • Horizontal straight line
  • Vertical straight line
  • Line inclined to x-axis
  • Parabola
Q15 | For any part of a beam subjected to uniformly distributed load, Shear forcediagram is
  • Horizontal straight line
  • Vertical straight line
  • Line inclined to x-axis
  • Parabola
Q16 | For any part of a beam subjected to uniformly distributed load, bending moment diagram is
  • Horizontal straight line
  • Vertical straight line
  • Line inclined to x-axis
  • Parabola
Q17 | In a simple supported beam having length = l and subjected to a concentratedload (W) at mid-point.
  • Maximum Bending moment = Wl/4 at the mid-point
  • Maximum Bending moment = Wl/4 at the end
  • Maximum Bending moment = Wl/8 at the mid-point
  • Maximum Bending moment = Wl/8 at the end
Q18 | In a cantilever subjected to a concentrated load (W) at the free end and having length =l, Maximum bending moment is
  • Wl at the free end
  • Wl at the fixed end
  • Wl/2 at the fixed end
  • Wl at the free end
Q19 | At a point in a simply supported or overhanging beam where Shear force changes sign and = 0, Bending moment is
  • Maximum
  • Zero
  • Either increasing or decreasing
  • Infinity
Q20 | In a cantilever subjected to a combination of concentrated load, uniformly distributed load and uniformly varying load, Maximum bending moment is
  • Where shear force=0
  • At the free end
  • At the fixed end
  • At the mid-point
Q21 | Point of contra-flexure is a
  • Point where Shear force is maximum
  • Point where Bending moment is maximum
  • Point where Bending moment is zero
  • Point where Bending moment=0 but also changes sign from positive to negative
Q22 | Point of contra-flexure is also called
  • Point of maximum Shear force
  • Point of maximum Bending moment
  • Point of inflexion
  • Fixed end
Q23 | The slope of shear force line at any section of the beam is also called
  • Bending moment at that section
  • Rate of loading at that section
  • Maximum Shear force
  • Maximum bending moment
Q24 | The direction of shear stress in a loaded beam is
  • Horizontal
  • Horizontal as well as vertical
  • Vertical
  • None
Q25 | Shear stress in the beam acting on the cross section is
  • Normal to the cross section
  • Tangential to the cross section
  • Neither normal nor tangential
  • None