Question

The local velocity of a fluid along a stream line can be measured by

• A. Pitot tube
• B. Venturi meter
• C. Rota meter
• D. Orifice meter

Hint:

Pitot tube measures local fluid velocity by using stagnation pressure and static pressure difference.

Answer 1

The Correct Option is A

A Pitot tube is used to measure local velocity of a fluid. It works by measuring the difference between stagnation pressure and static pressure. When a fluid is brought to rest at the mouth of the Pitot tube, its kinetic energy is converted into pressure energy. Using Bernoulli's equation, the velocity can be calculated from the pressure difference. Venturi meter and orifice meter are used to measure flow rate in pipes. Rota meter is also used to measure volumetric flow rate. But for local velocity measurement along a streamline, the suitable device is: \[ \text{Pitot tube}. \]