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  • Question

  • If percentage elongation of a certain specimen made of a material 'A' under tensile test is 30% and the percentage elongation of a specimen with same dimensions made of another material 'B' is 40%, then material 'B' is more ductile than material 'A'.


  • Options
  • A. Correct
  • B. Incorrect

  • Correct Answer
  • Correct 

    • Strength of Materials problems

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    • 1. When a closely-coiied helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring (?) is given by (where d = Diameter of spring wire, n = No. of turns of the spring, and C = Modulus of rigidity for the spring material)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 2. According to Euler's column theory, the crippling load of a column is given by p = ?2 EI/Cl2. In the Euler's formula, the value of C for a column with both ends fixed is 4.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 3. Fatigue test is carried out for

    • Options
    • A. stresses varying between two limits of equal value, but of opposite sign
    • B. stresses varying between two limits of unequal value, but of opposite sign
    • C. stresses varying between two limits of unequal value but of same sign
    • D. all of the above
      • Discuss
    • 4. The hoop stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is (where ? = Efficiency of the riveted joint)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. The buckling load for a given column depends upon

    • Options
    • A. area of cross-section of the column
    • B. length and least radius of gyration of the column
    • C. modulus of elasticity for the material of the column
    • D. all of the above
      • Discuss
    • 6. In the below figure, the point B represents upper yield point.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 7. Lame's theory is associated with

    • Options
    • A. thin cylindrical shells
    • B. thick cylindrical shells
    • C. direct and bending stresses
    • D. none of these
      • Discuss
    • 8. The centre to centre distance, between two consecutive rivets in a row, is called

    • Options
    • A. margin
    • B. pitch
    • C. back pitch
    • D. diagonal pitch
      • Discuss
    • 9. Factor of safety is defined as the ratio of

    • Options
    • A. ultimate stress to working stress
    • B. working stress to ultimate stress
    • C. breaking stress to ultimate stress
    • D. ultimate stress to breaking stress
      • Discuss
    • 10. The torsional rigidity of a shaft is expressed by the torque required to produce a twist of one radian per unit length of a shaft.

    • Options
    • A. True
    • B. False
      • Discuss

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