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This set of Strength of Materials Multiple Choice Questions & Answers (MCQs) focuses on Strength Of Materials Set 21
Q1 | The actual neutral axis of a reinforced cement concrete beam is based on the principle that the moment of areas of compression and tension zones at the neutral axis are equal.
- Agree
- Disagree
Q2 | Mohr's circle is used to determine the stresses on an oblique section of a body subjected to
- direct tensile strss in one plane accompanied by a shear stress
- direct tensile stress in two mutually perpendicular directions
- direct tensile stress in two mutually perpendicular directions accompanied by a simple shear stress
- all of the above
Q3 | The maximum tangential stress in a thick cylindrical shell is always
- equal to
- less than
- greater than
Q4 | When a body is subjected to a direct tensile stress (?) in one plane, the maximum shear stress is
- equal to
- one-half
- two-third
- twice
Q5 | The direct stress, across a principal plane, is known as principal stress.
- Yes
- No
Q6 | The direct stress induced in a long column is
- same
- more
- less
- negligible
Q7 | When a bar of length l, width b and thickness t is subjected to a push of P, its
- length, width and thickness increases
- length, width and thickness decreases
- length increases, width and thickness decreases
- length decreases, width and thickness increases
Q8 | The thickness of a thin cylindrical shell with hemispherical ends is
- equal to
- more than
- less than
Q9 | The total strain energy stored in a body is called proof resilience.
- Agree
- Disagree
Q10 | When shear force at a point is zero, then bending moment is
- zero
- minimum
- maximum
- infinity
Q11 | For a shaft, the shear stress at a point is
- equal to
- directly proportional to
- inversely proportional to
Q12 | The elongation of a conical bar under its own weight is
- equal to
- half
- one-third
- two-third
Q13 | When a body is subjected to a direct tensile stress (?), maximum normal stress is equal to the direct tensile stress.
- Agree
- Disagree
Q14 | The hoop stress in a thin cylindrical shell is
- longitudinal stress
- compressive stress
- radial stress
- circumferential tensile stress
Q15 | The bending moment at the free end of a cantilever beam is
- zero
- minimum
- maximum
Q16 | Modular ratio of the two materials is the ratio of
- linear stress to linear strain
- shear stress to shear strain
- their modulus of elasticities
- their modulus of rigidities
Q17 | A beam of uniform strength may be obtained by
- keeping the width uniform and varying the depth
- keeping the depth uniform and varying the width
- varying the width and depth both
- any one of the above
Q18 | The rectrangular beam 'A' has length l, width b and depth d. Another beam 'B' has the same width and depth but length is double that of 'A'. The elastic strength of beam B will be
- same
- One-half
- One-fourth
- One-eighth
Q19 | A column with maximum equivalent length has
- both ends hinged
- both ends fixed
- one end fixed and the other end hinged
- one end fixed and the other end free
Q20 | Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter D / 2. The strength of shaft 'B' is
- one-eight
- one-fourth
- one-half
- four times
Q21 | The distance between the centre of a rivet hole to the nearest edge of plate, is called
- margin
- pitch
- back pitch
- diagonal pitch
Q22 | The strain energy stored in a spring, when subjected to maximum load, without suffering permanent distortion, is known as
- impact energy
- proof resilience
- proof stress
- modulus of resilience
Q23 | The section modulus of a circular section about an axis through its C.G., is
- ?d2 / 4
- ?d2 / 16
- ?d3 / 16
- ?d3 / 32
Q24 | The shear force at a point on a beam is the algebraic
- sum
- difference
Q25 | In case of an under-reinforced beam, the depth of actual neutral axis is
- same as
- less than
- greater than