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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