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This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on Strength Of Materials Set 12
Q1 | Every direct stress is always accompanied by a strain in its own direction and an opposite kind of strain in every direction, at right angles to it. Such a strain is known as
- linear strain
- lateral strain
- volumetric strain
- shear strain
Q2 | The bending stress in a beam is
- equal to
- less than
- more than
- directly proportional to
Q3 | The section nodulus (Z) of a beam is given by
- I / y
- I.y
- y / I
- M / I
Q4 | According to Euler's column theory, the crippling load for a column of length (l) with one end fixed and the other end free is
- equal to
- less than
- more than
Q5 | A shear stress across a plane, is always accompanied by a balancing shear stress across the plane and normal to it.
- True
- False
Q6 | Two closely coiled helical springs 'A' and 'B' are equal in all respects but the number of turns of spring 'A' is half that of spring 'B'. The ratio of deflections in spring 'A' to spring 'B' is
- 1 ? 8
- 1 ? 4
- 1 ? 2
- 2
Q7 | A lap joint is always in
- single
- double
Q8 | The shear force and bending moment zre zero at the free end of a cantilever beam, if it carries a
- point load at the free end
- point load at the middle of its length
- uniformly distributed load over the whole length
- none of the above
Q9 | In a thick cylindrical shell subjected to an internal pressure (p), the radial stress across the thickness of a cylinder is
- maximum at the outer surface and minimum at the inner surface
- maximum at the inner surface and minimum at the outer surface
- maximum at the outer surface and zero at the inner surface
- maximum at the inner surface and zero at the outer surface
Q10 | The forsional rigidity of a shaft is given by
- T / J
- T / ?
- T / r
- T / G
Q11 | In a tensile test, when the material is stressed beyond elastic limit, the tensile strain
- decreases slowly
- increases slowly
- decreases more quickly
- increases more quickly
Q12 | Within elastic limit, shear stress is
- equal to
- less than
- directly proportional to
- inversely proportional to
Q13 | A cantilever beam of length / carries a gradually varying load from zero at free end and w per unit length at the fixed end. The maximum deflection oes at
- free end
- fixed end
- mid-span
Q14 | The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is
- 2 ? 3
- 3 ? 4
- one
- 9 ? 8
Q15 | The rivets are used for
- permanent
- temporary
Q16 | The maximum deflection of a fixed beam carrying a central point load lies at
- fixed ends
- centre of beam
- l / 3 from fixed ends
- none of these
Q17 | Hook's law holds good up to
- yield point
- elastic limit
- plastic limit
- breaking point
Q18 | At the neutral axis of a beam, the shear stress is
- zero
- minimum
- maximum
- infinity
Q19 | The bending moment on a section is maximum where shear force is
- minimum
- maximum
- changing sign
- zero
Q20 | In a thick cylindrical shell subjected to an internal pressure (p), the tangential stress across the thickness of a cylinder is
- maximum at the outer surface and minimum at the inner surface
- maximum at the inner surface and minimum at the outer surface
- maximum at the outer surface and zero at the inner surface
- maximum at the inner surface and zero at the outer surface
Q21 | The shear modulus of most materials with respect to the modulus of elasticity is
- equal to half
- less than half
- more than half
- none of these
Q22 | The maximum shear stress developed in a beam of rectangular section is
- equal to
- 4 / 3 time
- 1.5 times
- twice
Q23 | The maximum shear stress of a beam of triangular section occurs above the neutral axis.
- Correct
- Incorrect
Q24 | Which of the following is a proper sequence?
- proportional limit, elastic limit, yielding, failure
- elastic limit, proportional limit, yielding, failure
- yielding, proportional limit, elastic limit, failure
- none of the above
Q25 | Parallel fillet welds are designed for bending strength.
- Agree
- Disagree