Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams — December 2018 — 16-Civ-A5, Hydraulic Engineering. Closed book (one aid sheet; approved calculator); 3 hours; six questions, candidates complete any five — all six are solved here as a study resource. Each question 20 marks; parts of equal value.
Reference texts: Chin, Water-Resources Engineering (Pearson); Chow, Open-Channel Hydraulics (McGraw-Hill); Chaudhry, Open-Channel Flow (Springer); Munson, Young & Okiishi, Fundamentals of Fluid Mechanics (Wiley); Roberson, Cassidy & Chaudhry, Hydraulic Engineering.
Governing relations supplied on the exam cover sheet: Hazen–Williams $Q = 0.278\,C\,D^{2.63}\,S^{0.54}$ with slope $S=\Delta h/L$ (SI: $Q$ in m³/s, $D$ in m); Manning $Q=\tfrac{1}{n}A\,R^{2/3}\,S^{1/2}$; Darcy–Weisbach $\Delta h = 0.0826\,\tfrac{fL}{D^{5}}Q^{2}$; total dynamic head $TDH=H_s+H_f$. Unless stated, local losses and velocity head are negligible, diameters are nominal, and the fluid is water ($\rho=1000\ \text{kg/m}^3$, $\nu=1.31\times10^{-6}\ \text{m}^2/\text{s}$).
