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

  • question_answer
                                               The power required by a machine having an efficiency of 80% for raising a load of 24 N through a distance of 36 m in 1 minutes is:                      

    A) 12 W                

    B) 18 W            

    C) 50 W                

    D) 450 W       

    Correct Answer: B

    Solution :

    Power \[=\frac{24\times 36}{60\times 0.8}=18\,W\]


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