Strength Of Materials Set 9

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This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on Strength Of Materials Set 9

Q1 | The portion, which should be removed from top and bottom of a circular cross section ofdiameter d in order to obtain maximum section modulus, is
  • 0.01 d
  • 0.1 d
  • 0.011 d
  • 0.11 d
Q2 | A beam of overall length / rests on two simple supports with equal overhangs on both sides. Two equal loads act at the free ends. If the deflection at the centre of the beam is the same as at either end, then the length of either overhang is
  • 0 152 1
  • 0.207 1
  • 0.252 1
  • 0.277 1
Q3 | A beam ABC rests on simple supports at A and B with BC as an overhang. D is centre of span AB. If in the first case a concentrated load P acts at C while in the second case load P actsat D, then the
  • deflection at D in the first case will be equal to the deflection at C in the second case
  • deflection at C in the first case is equal to the deflection at D in the second case
  • deflection at D in the first case will always be smaller than the deflection at C in the second case
  • deflection at D in the first case will always be greater than the deflection at C in the second case
Q4 | If the deflection at the free end of a uniformly loaded cantilever beam is 15mm and the slope of the deflection curve at the free end is 0.02 radian, then the length of the beam is
  • 0.8 m
  • lm
  • 1.2 m
  • 1.5m
Q5 | A cantilever beam carries a uniformly distributed load from fixed end to the centre of the beam in the first case and a uniformly distributed load of same inten¬sity from centre of the beam to the free end in the second case. The ratio of deflections in the two cases is
  • 1/2
  • 3/11
  • 5/24
  • 7/41
Q6 | If the length of a simply supported beam carrying a concentrated load at the centre isdoubled, the defection at the centre will become
  • two times
  • four times
  • eight times
  • sixteen times
Q7 | A simply supported beam with rectangular cross-section is subjected to a central concentrated load. If the width and depth of the beam are doubled, then the deflection at the centre of the beam will be reduced to
  • 50%
  • 25%
  • 12.5%
  • 6.25%
Q8 | A laminated spring is given an initial curvature because
  • it is more economical
  • it gives uniform strength
  • spring becomes flat when it is subjec-ted to design load
  • none of the above
Q9 | A laminated spring is supported at
  • ends and loaded at centre
  • centre and loaded at ends
  • ends and loaded anywhere
  • centre and loaded anywhere
Q10 | Laminated springs are subjected to
  • direct stress
  • bending stress
  • shear stress
  • none of the above
Q11 | Deflection in a leaf spring is more if its
  • strength is more
  • strength is less
  • stiffness is less
  • stiffness is more
Q12 | Buckling load for a given column depends upon
  • length of column only
  • least lateral dimension only
  • both length and least lateral dimension
  • none of the above
Q13 | When both ends of a column are fixed, the crippling load is P. If one end of the column is made free, the value of crippling load will be changed to
  • P/16
  • P/4
  • P/2
  • 4P
Q14 | Euler's formula for a mild steel long column hinged at both ends is not valid for slendernessratio
  • greater than 80
  • less than 80
  • greater than 180
  • greater than 120
Q15 | A long column has maximum crippling load when its
  • both ends are hinged
  • both ends are fixed
  • one end is fixed and other end is hinged
  • one end is fixed and other end is free
Q16 | Effective length of a chimney of 20 m height is taken as
  • 10 m
  • 20m
  • 28.28m
  • 40m
Q17 | Rankine's formula for column is valid when slenderness ratio
  • lies between 0 and 140
  • lies between 0 and 100
  • is less than 80
  • has any value
Q18 | Slenderness ratio of a 5 m long column hinged at both ends and having a circular crosssection with diameter 160 mm is
  • 31.25
  • 62.5
  • 100
  • 125
Q19 | The effect of arching a beam is
  • to reduce bending moment throughout
  • to increase bending moment throughout
  • to increase shear force
  • to decrease shear force
Q20 | Internal forces at every cross-section in a arch are
  • nornal thrust and shear force
  • shear force and bending moment
  • normal thrust and bending moment
  • normal thrust, shear force and bending moment
Q21 | According to Eddy's theorem, the vertical intercept between the linear arch and the centreline of actual arch at any point represents to some scale
  • bending moment
  • shear force
  • normal thrust
  • deflection
Q22 | Due to rise in temperature in a three hinged arch, induced stress is
  • direct compressive
  • direct tensile
  • shear
  • none of the above
Q23 | In a three hinged arch, the linear and the actual arch meet at
  • at least three points
  • at least two points
  • all points irrespective of loading
  • nowhere
Q24 | If a three hinged parabolic arch carries a uniformly distributed load over the entire span, thenany section of the arch is subjected to
  • normal thrust only
  • normal thrust and shear force
  • normal thrust and bending moment
  • normal thrust, shear force and bending moment
Q25 | Three hinged arch is
  • statically indeterminate by one degree
  • statically indeterminate by two degrees
  • statically determinate
  • unstable structure