True: Venturimeter is based on Bernoulli’s equation.

The venturi meter is a flow measurement device that is based on the principle of the conservation of energy and the integral form of Euler's equation.

Euler's equation describes the relationship between the pressure, velocity, and elevation of a fluid in motion. It is derived from the principles of fluid mechanics and is widely used in various engineering applications.

The integral form of Euler's equation states that the sum of the pressure, velocity head, and elevation head at any point in a fluid flow system is constant along a streamline. This means that as the fluid flows through a constriction, such as a venturi meter, the total energy of the fluid remains constant.

The venturi meter consists of a converging section, a throat section, and a diverging section. As the fluid flows through the converging section, its velocity increases and its pressure decreases according to Bernoulli's principle. At the throat section, the fluid reaches its maximum velocity and lowest pressure. Finally, as the fluid flows through the diverging section, its velocity decreases and its pressure increases.

By measuring the pressure difference between the converging and throat sections of the venturi meter, the velocity of the fluid can be determined using the integral form of Euler's equation. This velocity can then be used to calculate the flow rate of the fluid.

Overall, the venturi meter is a flow measurement device that utilizes the integral form of Euler's equation to accurately determine the flow rate of a fluid based on the pressure difference across a constriction.