### Structural Mechanics Set 5

This set of Structural Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Structural Mechanics Set 5

Q1 | The moment of inertia of a body is always minimum with respect to its
• Base
• Centroidal axis
• Vertical axis
• Horizontal axis
Q2 | Moment of inertia is the
• Second moment of area
• Second moment of mass
• Second moment of force
• All of these
Q3 | In a simply supported beam carrying a uniformly distributed load W/m over the left half span, the point of contra flexure will occur in
• Left half span of the beam
• Right half span of the beam.
• Quarter points of the beam
• Does not exist
Q4 | A sudden increase or decrease in shear force diagram between any twopoints indicates that there is
• Point loads between the two points
• U.D.L. between the two points
• None of these
Q5 | When the bending moment is parabolic curve between two points, it indicates that there is
• Point loads between the two points
• U.D.L. between the two points
• Uniformly varying load between the two points
Q6 | In Fig.(a), max B.M. will be
• 40 kN-m
• 50 kN-m
• 60 kN-m
• 80 kN-m
Q7 | In Fig. (a), slope of S.F.D. between B and C will be
• Zero
• 10 kN
• 15 kN
• 20 kN
Q8 | What is the bending moment at end supports of a simply supported beam?
• Maximum
• Minimum
• Zero
• Uniform
Q9 | What is the maximum shear force, when a cantilever beam is loaded withudl throughout?
• w×l
• w
• w/l
• w+l
Q10 | Sagging, the bending moment occurs at the of the beam.
• At supports
• Mid span
• Point of contraflexure
• Point of emergence
Q11 | What will be the variation in BMD for the diagram? [Assume l = 2m].
• Rectangular
• Trapezoidal
• Triangular
• Square
Q12 | What is the maximum bending moment for simply supported beam carrying a point load “W” kN at its centre?
• W kNm
• W/m kNm
• W×l kNm
• W×l/4 kNm
Q13 | How do point loads and udl be represented in SFD?
• Simple lines and curved lines
• Curved lines and inclined lines
• Simple lines and inclined lines
• Can’t represent any more
Q14 | curve is formed due to bending of overhanging beams.
• Elastic
• Plastic
• Flexural
• Axial
Q15 | The relation between slope and maximum bending moment is
• Directly proportion
• Inversely proportion
• Relative proportion
• Mutual incidence
Q16 | What is the SF at support B?
• 5 kN
• 3 kN
• 2 kN
• 0 kN
Q17 | Where do the maximum BM occurs for the below diagram.
• -54 kNm
• -92 kNm
• -105 kNm
• – 65 kNm
Q18 | Shear force is unbalanced to the left or right of the section.
• Horizontal force
• Vertical force
• Inclined force
• Conditional force
Q19 | SI units of shear force is
• kN/m
• kN-m
• kN
• m/N
Q20 | Determine the moment at fixed end.
• 40 kNm
• 50 kNm
• 60 kNm
• 80 kNm
Q21 | Shear force diagram is representation of shear force plotted as ordinate.
• Scalar
• Aerial
• Graphical
• Statically
Q22 | Hogging is
• Negative bending moment
• Positive shear force
• Positive bending moment
• Negative shear force
Q23 | At the point of contraflexure, the value of bending moment is
• Zero
• Maximum
• Can’t be determined
• Minimum
Q24 | Positive/negative bending moments occur where shear force changes its sign.
• Minimum
• Zero
• Maximum
• Remains same
Q25 | Shear force of following diagram
• Rectangle
• Square
• Circle
• Trapezoidal