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Home Mechanical Engineering Strength of Materials Comments

  • Question
  • For biaxial stress, the planes of maximum shear are at right angles to each other and are inclined at 45° to the principal planes.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 


  • Strength of Materials problems


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    • 1. A thin cylindrical shell of diameter (d), length (l) and thickness (t)is subjected to an internal pressure (p). The hoop stress in the shell is

    • Options
    • A. pd/t
    • B. pd/2t
    • C. pd/4t
    • D. pd/6t
    • Discuss
    • 2. A steel bar 2 m long, 20 mm wide and 10 mm thick is subjected to a pull of 2 kN. If the same bar is subjected to a push of 2 kN, the Poission's ratio of the bar in tension will be __________ the Poisson's ratio for the bar in compression.

    • Options
    • A. equal to
    • B. less than
    • C. greater than
    • Discuss
    • 3. The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, l = Original length of the body, A = Cross-sectional area of the body, and E = Young's modulus for the material of the body)

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 4. The distance between the centre of a rivet hole to the nearest edge of plate, is called

    • Options
    • A. margin
    • B. pitch
    • C. back pitch
    • D. diagonal pitch
    • Discuss
    • 5. The neutral axis of a transverse section of a beam passes through the centre of gravity of the section and is

    • Options
    • A. in the vertical plane
    • B. in the horizontal plane
    • C. in the same plane in which the beam bends
    • D. at right angle to the plane in which the beam bends
    • Discuss
    • 6. When a body is subjected to a direct tensile stress (?) in one plane, then normal stress on an oblique section of the body inclined at an angle ? to the normal of the section is

    • Options
    • A. ? cos ?
    • B. ? cos2 ?
    • C. ? sin ?
    • D. ? sin2 ?
    • Discuss
    • 7. In the above question, the ratio of stiffness of spring 'B' to spring 'A' will be

    • Options
    • A. 2
    • B. 4
    • C. 6
    • D. 8
    • Discuss
    • 8. In a tensile test, when the material is stressed beyond elastic limit, the tensile strain __________ as compared to the stress.

    • Options
    • A. decreases slowly
    • B. increases slowly
    • C. decreases more quickly
    • D. increases more quickly
    • Discuss
    • 9. A pressure vessel is said to be a thick shell, when

    • Options
    • A. it is made of thick sheets
    • B. the internal pressure is very high
    • C. the ratio of wall thickness of the vessel to its diameter is less than 1/10.
    • D. the ratio of wall thickness of the vessel to its diameter is greater than 1/10.
    • Discuss
    • 10. The maximum bending moment of a simply supported beam of span l and carrying a point load W at the centre of beam, is

    • Options
    • A. Wl/4
    • B. Wl/2
    • C. Wl
    • D. Wl2/4
    • Discuss


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