A steel bar of 10 mm, heated from 5°C to 20°C, is fixed at end and free at next. The stress induced is

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Group 'A'

8. A steel bar of 10 mm, heated from 5°C to 20°C, is fixed at end and free at next. The stress induced is When a bar is heated and one end is free, it can expand without any restriction. Thermal stress is only induced when thermal expansion or contraction is restrained. Since the bar is free to expand, no thermal stress is induced.

   • The correct option is (C).
   • Zero Thermal

9. The assumption, the material of beam is isotropic means An isotropic material is one whose mechanical properties (such as Young's modulus, Poisson's ratio