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This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on Strength Of Materials Set 34
Q1 | Materials exhibiting time bound behaviour are known as
- Anelastic
- Visco elastic
- Reactive
- Fissile
- Isentropic
Q2 | The shear stress when a circular shaft subjected to torsion is
- maximum, maximum
- minimum, minimum
- maximum, minimum
- minimum, maximum
- None of the above
Q3 | The deflection of a beam may be reduced by
- decreasing the depth of beam
- increasing the span
- providing greater end restrains
- any of the above methods
- None of the above
Q4 | The safe working pressure for a spherical vessel 1.5 m diameter and 1.5 cm wall thickness with limiting tensile stress of 450 kg/cm2 would be
- 18 kg/cm2
- 36 kg/cm2
- 4.5 km/cm3
- 9 kg/cm2
- 45 kg/cm2
Q5 | For a shear force to be uniform throughout the span of a simply supported beam, it should be subjected to
- a couple at mid span
- a couple at any point on the span
- a uniformly distributed load
- two concentrated loads spaced at third points
- None of the above
Q6 | A cylindrical section having no joint is known as
- Perfect section
- Strong section
- Jointless section
- Seamless section
- Stress free section
Q7 | Poisson's ratio for cast iron is
- 0.38
- 0.36
- 0.27
- 0.33
- 0.31
Q8 | A beam of uniform strength is one in which
- The bending stress is same at every section
- The bending moment is same at every section
- The cross-section is same throughout
- The stiffness is same at every section
- The load on fibres is same at every section
Q9 | A material which undergoes no deformation till its yield point is reached and then it flows at a constant stress is known as
- 25
- Rigid-plastic
- Elasto-plastic
- Plasto-electric
- Rigid-elastic
Q10 | The neutral axis of beam
- Is subjected to maximum stress
- Is subjected to maximum shear force
- Has tensile stress on one side and compressive stress on the other
- Is in the same plane in which the beam bends
- None of the above
Q11 | For which of the following diameters a seam-less pipe of 3 mm wall thickness will be considered as a thin walled cylinder?
- 30 mm
- 60 mm
- 80 mm
- 90 mm
- All of the above
Q12 | All elastic materials
- Elongate on the application of load
- Shrink on the application of load
- Permanently deform under load
- Do not deform under load
- None of the above
Q13 | The heaviest I section for the same depth is
- ISMB
- ISLB
- ISHB
- ISWB
- None of the above
Q14 | When a no. of loads rest upon a beam, the deflection at any point is equal to the sum of the deflections at this point due to each of the loads taken separately. This is according to
- Moment shear relation
- Theory of flexure
- Principle of least work
- Castiglano's theorem
- Max's well theorem
Q15 | A form factor is introduced in the design of compressive members to represent the effect of
- local buckling
- voids
- grain orientation
- diagonal buckling
- None of the above
Q16 | As compared to the Brinell hardness lest, the Rockwell method
- makes a thinner indentation
- may be used on thicker materials
- is much slower
- all of the above
- None of the above
Q17 | Two cantilever beams are of equal length. One carries a uniformly distributed load and other carries same load but concentrated at the free end. The ratio of maximum deflection is
- 2?3
- 5?12
- 1?3
- 1?2
- 5?6
Q18 | In a three-hinged beam, the bending moment will be zero at
- the left hinge
- the right hinge
- both the hinges
- the crown
- None of the above
Q19 | Arching of a beam results in
- increased bending moment throughout
- reduced bending moment throughout
- increased bending moment at the support
- no change in bending moment
- None of the above
Q20 | A dead load is
- One that can be neglected
- One that does not exist
- One that is dead
- One that remains constant.
- One that does not move
Q21 | In the simple bending theory one of the assumptions usually made is that the plane sections before bending remain plane after bending. This assumption implies that
- Stress is proportional to the distance from the neutral axis
- Stress is uniform in the beam cross section
- Stress is proportional to strain at all section
- Stress is uniform in the beam cross-section
- Strain is proportional to the distance from the neutral axis
Q22 | Along the principal plane subjected to maximum principal shear
- The maximum shear stress acts
- The minimum shear stress acts
- No shear stress acts
- Any of the above
- None of the above
Q23 | If the value of Young's modulus of elasticity for a material is zero, it implies that the material
- is in gaseous state
- is visco-elastic
- incompressible
- plastic
- None of the above
Q24 | A steel shaft 6 mm in diameter turns at 10,000 r.p.m. the safe working stress in shear is 350 kg/cm2. The maximum power that such a shaft may develop is approximately
- 2
- 2.45
- 1
- 0.5
- 1.73
Q25 | The area around the centre of gravity of a cross-section within which any load applied will produce stress of only one sign throughout the entire cross-section, is known as
- Symmetrical
- Centroid
- Kern
- Neutral zone
- Balance zone