Civil Engineering MCQJE Level Civil Engineering
A venturimeter is used for measuring:
Fluid MechanicsFluid MechanicsEASY
Choose the correct answer
A
Open channel water level
B
Pipe flow rate using differential pressure (Bernoulli''s principle)
C
Turbine power output
D
Pump efficiency
Correct Answer
B. Pipe flow rate using differential pressure (Bernoulli''s principle)
Why is this the answer?
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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