The pressure differential in Venturi meters assists in measuring what?

• A. Fluid density
• B. Fluid velocity
• C. Fluid viscosity
• D. Fluid temperature

Answer: (B)

The pressure differential in Venturi meters is crucial for determining fluid velocity. A Venturi meter operates on the principle of Bernoulli's equation, which relates pressure, velocity, and elevation for a fluid in motion. As fluid flows through the meter, it passes through a constricted section where its velocity increases, leading to a decrease in pressure due to the conservation of energy.

The pressure differential created between the wider and narrower sections of the meter can be measured and used to calculate the fluid's velocity. This is done using the equation derived from Bernoulli's principle, which shows that the flow rate and pressure difference are directly related. Thus, by measuring the pressure difference, operators can accurately calculate how fast the fluid is moving through the system, making it an essential tool for flow measurement.