Which manometric design exhibits the highest sensitivity __________________?
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Answer: D. micro-manometer with water
Explanation
A micro-manometer using water provides exceptional sensitivity for detecting very small pressure differences. The physical properties of water combined with specialized gauge designs amplify minor fluid height changes. This specialized instrument accurately measures minute pressure variations that standard manometers cannot detect. Manometers are pressure-measuring devices that utilize liquid columns in U-shaped transparent tubes. Sensitivity depends heavily on the density of the working fluid and the inclination angle of the tube. Water has a much lower density than mercury, resulting in larger column displacements for identical pressures.
Laboratory experiments involving low-speed aerodynamic airflow require extreme measurement precision to capture pressure drops. HVAC technicians use sensitive pressure instruments to check delicate ventilation duct pressures and filter restrictions. Accurate micro-pressure measurement is crucial in environmental engineering and specialized medical respiratory equipment. A standard U-tube with water lacks the specialized mechanical amplification found in dedicated micro-manometer designs. A U-tube containing high-density mercury exhibits lower sensitivity because the heavy liquid resists significant displacement. Displacement type manometers generally serve different industrial measurement functions rather than maximizing ultra-fine sensitivity.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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