Strength Of Materials Set 31

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This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on Strength Of Materials Set 31

Q1 | If the rivet value is 2000 N and the force in the member is 2000 N, the number of rivets required for the connection of the member to a gusset plate is
  • 1
  • 2
  • 4
  • 8
  • None of the above
Q2 | A material which recovers fully after unloading but not instantaneously is known as
  • Elastic
  • Partially elastic
  • Anelastic
  • Inelastic
  • Plastic
Q3 | If Young's modulus of elasticity is determined for mild steel in tension and compression, the two values will have a ratio (Et/Er) of
  • Rhombus
  • 0.5
  • 1.2
  • 1
  • 2
Q4 | Clad metals are
  • Non-ferrous materials
  • Two or more dissimilar materials riveted together
  • Two or more dissimilar materials joined together by welding
  • Two or more dissimilar materials jointed together under very high hydraulic pressure
  • None of the above
Q5 | Two bars of sifferent materials are of the same size and are subjected to same tensile forces. If the bars have unit elongation in the ratio of 7 : 3, then the ratio of modulii of elasticity of the two materials is
  • 8 ; 3
  • 3 ; 8
  • 64 ; 9
  • 9 ; 64
  • None of the above
Q6 | A square steel bar 20 mm on a side is subjected to an axial compressive load of 8 kN. The normal stress acting on plane 30? to the line action of the axial load will be
  • 0.5 N/mm2
  • 2.5 N/mm2
  • 50 N/mm2
  • 550 N/mm2
  • None of the above
Q7 | Hooke's Law is valid within the limits of proportionality. The limit of proportionality depends on
  • type of loading
  • area of cross-section
  • type of material
  • hardness of material
  • None of the above
Q8 | In case of thin walled cylinders the ratio of hoop stress to radial stress is
  • 2
  • 4
  • None of the above
Q9 | Strain rosettes are generally used for
  • Measurement of resilience
  • Measurement of proof stress
  • Measurement of shear strain
  • Measurement of longitudinal strains
  • Measurement of load
Q10 | When a strip made of iron and copper is heated
  • It bends
  • It gets twisted
  • Iron bends on convex side
  • Iron bends on concave side
  • None of the above
Q11 | The ratio of maximum shear stress to average shear stress in case of a circular beam transmitting power is equal to
  • 3?4
  • 5?4
  • 2?5
  • 4?3
  • 4?5
Q12 | In case the modulus of elasticity for a material is 200 GN/m2 and Poisson's ratio is 0.25, the modulus of rigidity is
  • 250 GN/m2
  • 125 GN/m2
  • 80 GN/m2
  • 320 GN/m2
  • None of the above
Q13 | The ratio of maximum shear stress to the average shear stress in a rectangular beam subjected to torsion is
  • 4?5
  • 5?4
  • 3?4
  • 3?2
  • 2?3
Q14 | The safe value of stress under which a member subjected to reversible tensile or compressive stress will not fail is known as
  • Safe stress
  • Fatigue stress
  • Endurance limit
  • Proof stress
  • Elastic limit stress
Q15 | When a member is subjected to axial tensile load, the greatest normal stress is equal to
  • half the maximum shear stress
  • maximum shear stress
  • twice the maximum shear stress
  • four times the maximum shear stress
  • None of the above
Q16 | If the load at the free end of a cantilever beam is increased, the failure will occur
  • Any where between free end and centre
  • At the centre
  • At the free and
  • At the support
  • Any where between free end and support
Q17 | Moment area method is useful determining the following in a beam
  • slope and deflection at point
  • Shear force and bending moment at a point
  • tensile and compressive stresses at a point
  • None of the above
  • None of the above
Q18 | According to Rankine's theory of failure, elastic failure occurs
  • When the minor principal stress is equal to the elastic limits value in a simple tension test
  • When the greatest principal stress reaches the elastic limit value in simple tension test
  • When the greatest principal stress is equal to the stress corresponding to the upper yield limit in a tension test
  • None of the above
  • None of the above
Q19 | For a beam of length L fixed at end A and simply supported at end B and loaded uniformly by a load W the maximum bending moment will occur at
  • Centre C
  • B
  • A
  • Between AC
  • Between CD
Q20 | Necking in case of ductile materials begins at the
  • elastic limit point
  • upper yield point
  • lower yield point
  • ultimate point
  • None of the above
Q21 | The ratio of average shear stress to maximum shear stress for a circular section is
  • 3?2
  • 2?3
  • 4?3
  • 2
  • 3?4
Q22 | The bending moment diagram for a cantilever beam subjected to bending moment at the end of the beam would be
  • Rectangle
  • Triangle
  • Parabola
  • Cubic parabola
  • None of the above
Q23 | For which of following material the value of Poissons ratio is more than 1?
  • Cork
  • Dead mild steel
  • Wood
  • Plastic
  • None of the above
Q24 | The strain energy of the spring when it is subjected to the greatest load which the spring can carry without suffering permanent distortion is known as
  • Proof strain energy
  • Proof load stress
  • Proof resilience
  • Proof stress
  • Limiting stress
Q25 | The deformation of any structure takes place in such a manner that the work of deformation is a minimum. This is known as
  • Principle of least work
  • Law of minimum energy
  • Law of conservation of energy
  • Principle of failure of structure
  • None of the above