Railways R.R.C. (Ajmer) Solved Paper Held on 1st Shift 2-11-2014

  • question_answer Decibel is?

    A) a musical instrument

    B) a measure of sound level

    C) a musical noise

    D) a wavelength of noise

    Correct Answer: B

    Solution :

    The decibel scale measures sound based human hearing, which makes it one of the most unusual scientific measurements.               


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