A venturimeter is used for measuring:
Choose the correct answer
Open channel water level
Pipe flow rate using differential pressure (Bernoulli''s principle)
Turbine power output
Pump efficiency
Correct Answer
B. Pipe flow rate using differential pressure (Bernoulli''s principle)
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Venturimeter: measures pipe flow rate using Bernoulli''s principle. Converging section reduces area → increases velocity → decreases pressure; differential pressure head Δh used to calculate Q = Cd·A1·A2·√(2gΔh)/(√(A1²−A2²)). Cd ≈ 0.97–0.99. No moving parts, low energy loss. Other meters: orifice meter (Cd≈0.6), nozzle meter.
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