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Railways NTPC (Technical Ability) Engineering Mechanics and Strength of Materials Question Bank Strength of Materials

  • question_answer
    A metal pipe of 1 m diameter contains a fluid having a pressure of \[10\,\,\text{kgf/c}{{\text{m}}^{\text{2}}}\text{.}\] If the permissible tensile stress in the metal is \[200\,\,\text{kgf/c}{{\text{m}}^{\text{2}}}\] then the thickness of the metal required for making the pipe would be:

    A) 5 mm               

    B) 10 mm

    C) 20 mm             

    D) 25 mm

    Correct Answer: D

    Solution :

    \[{{\sigma }_{\theta }}=\frac{pd}{2t}\] \[t=\frac{10\times 100}{2\times 200}=2.5\,\,cm\,\,\,or\,\,\,25\,\,mm\]


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