• # question_answer                  What is the percentage error in the estimation of the discharge due to an error of 2% in the measurement of the reading of a differential manometer connected to an orifice meter?  A) 4                                 B) 3C) 2                                 D) 1

For an orificemeter $Q\propto \sqrt{H}$ or $Q=K\sqrt{H},$ Where, K = a constant In $Q=In\,K+\frac{1}{2}\,In\,H$ $\frac{dQ}{Q}=0+\frac{1}{2},$ $\frac{dH}{H}=\frac{1}{2}\times 2=1%$