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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