Discussion
Match the Columns:
| I | II |
|---|---|
| 1. Tensiometer | a. Consumptive use |
| 2. Piezometer | b. Bernoulli’s equation |
| 3. Lysimeter | c. Soil moisture |
| 4. Elbow meter | d. Hydrostatic pressure |
| 5. Pitot tube | e. Volumetric flow rate |
Answer: B
The correct matching is 1 - c, 2 - d, 3 - a, 4 - e, 5 - b.
- A tensiometer measures soil water tension, so it is used to monitor soil moisture.
- A piezometer is an open tube showing the hydrostatic pressure head at a point.
- A lysimeter is a soil-filled tank whose water balance gives evapotranspiration, the consumptive use of a crop.
- An elbow meter measures the pressure difference across a pipe bend, from which the volumetric flow rate is found.
- A Pitot tube converts velocity head to pressure, and is analysed with Bernoulli's equation.
Option A swaps the piezometer and Pitot tube, option C mismatches the first three instruments, and option D swaps the elbow meter and Pitot tube.
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