Question:

Match the Columns: \[ \begin{array}{|c|c|} \hline I & II
\hline 1. \; \text{Tensiometer} & a. \; \text{Consumptive use}
2. \; \text{Piezometer} & b. \; \text{Bernoulli's equation}
3. \; \text{Lysimeter} & c. \; \text{Soil moisture}
4. \; \text{Elbow meter} & d. \; \text{Hydrostatic pressure}
5. \; \text{Pitot tube} & e. \; \text{Volumetric flow rate}
\hline \end{array} \]

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While solving "Match the Columns", recall standard uses of instruments in hydrology and hydraulics. Each device is typically associated with one specific measurable property.
Updated On: Aug 30, 2025
  • 1 – c, 2 – b, 3 – a, 4 – e, 5 – d
  • 1 – c, 2 – d, 3 – a, 4 – e, 5 – b
  • 1 – d, 2 – c, 3 – e, 4 – a, 5 – b
  • 1 – c, 2 – d, 3 – a, 4 – b, 5 – e
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The Correct Option is B

Solution and Explanation

Step 1: Tensiometer. Tensiometer is an instrument used for measuring soil moisture tension. \[ \Rightarrow 1 \to c \; (\text{Soil moisture}) \]

Step 2: Piezometer. A piezometer measures hydrostatic pressure in fluids. \[ \Rightarrow 2 \to d \; (\text{Hydrostatic pressure}) \]

Step 3: Lysimeter. Lysimeter is used for measuring actual evapotranspiration and consumptive use of water. \[ \Rightarrow 3 \to a \; (\text{Consumptive use}) \]

Step 4: Elbow meter. Elbow meter measures volumetric flow rate of fluid. \[ \Rightarrow 4 \to e \; (\text{Volumetric flow rate}) \]

Step 5: Pitot tube. Pitot tube is used to measure velocity of fluid based on Bernoulli's equation. \[ \Rightarrow 5 \to b \; (\text{Bernoulli's equation}) \] Final Matching: \[ 1 \to c, \; 2 \to d, \; 3 \to a, \; 4 \to e, \; 5 \to b \] \[ \boxed{\text{Option (B)}} \]

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