Question

Match LIST I with LIST II
\[ \begin{array}{|l|l|} \hline \textbf{LIST I} & \textbf{LIST II} \\ \hline A. \ \text{Cutoff wall} & I. \ \text{Energy dissipation} \\ B. \ \text{Hydraulic jump} & II. \ \text{Critical flow condition} \\ C. \ \text{Froude number is one} & III. \ \text{Preventing piping below the structure} \\ D. \ \text{Flood routing} & IV. \ \text{Storage discharge relationship} \\ \hline \end{array} \]
Choose the correct answer from the options given below:

• A. A-I, B-II, C-IV, D-III
• B. A-II, B-I, C-IV, D-III
• C. A-III, B-I, C-II, D-IV
• D. A-III, B-IV, C-II, D-I

Hint:

Associate hydraulic engineering keywords: - Cutoff wall/Sheet pile \(\rightarrow\) Seepage/Piping control. - Hydraulic jump \(\rightarrow\) Energy dissipation. - Froude Number = 1 \(\rightarrow\) Critical flow. - Flood Routing \(\rightarrow\) Storage-Discharge relation.

Answer 1

The Correct Option is C

Step 1: Pair each term in LIST I with its correct definition or application in LIST II.
- A. Cutoff wall: An impermeable barrier installed beneath a dam or weir, extending into the foundation soil. Its main function is to lengthen the seepage path and reduce the hydraulic gradient, thus III. Preventing piping below the structure.
- B. Hydraulic jump: In open-channel flow, this occurs when a fast-moving (supercritical) stream abruptly decelerates and increases in depth (subcritical). This turbulent transition is effective for I. Energy dissipation, typically occurring on a spillway apron.
- C. Froude number is one: The dimensionless Froude number (Fr) indicates open-channel flow regimes. Fr = 1 signifies II. Critical flow condition, the theoretical maximum discharge for a given specific energy.
- D. Flood routing: This process forecasts the timing and shape of a flood wave in a river or reservoir. Reservoir routing is fundamentally based on the IV. Storage discharge relationship, which links reservoir storage volume to outflow rate.
Step 2: Document the correct pairings.
- A \(\rightarrow\) III
- B \(\rightarrow\) I
- C \(\rightarrow\) II
- D \(\rightarrow\) IV
This set of pairings corresponds to option (C).