Railways Technical Ability Automobile Engineering Question Bank Automobile Engineering

  • question_answer                                A shafts subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m add 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is:     

    A) 2000-N-m                     

    B) 2050 N-m

    C) 2100 N-m                     

    D) 2136 N-m

    Correct Answer: D

    Solution :

    \[{{T}_{e}}=\sqrt{{{\left( {{K}_{M}}M \right)}^{2}}+{{\left( {{K}_{T}}T \right)}^{2}}}\] \[=\sqrt{{{\left( 1.5\times 5000 \right)}^{2}}+{{\left( 2\times 1000 \right)}^{2}}}\] = 2135 N.m

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