Question

A pitot tube is used to measure

• A. Pressure
• B. Velocity of flow
• C. Difference in pressure
• D. Density

Hint:

Remember: A pitot tube measures fluid velocity by converting kinetic energy into pressure energy using Bernoulli’s equation.

Answer 1

The Correct Option is B

Step 1: Understand the function of a pitot tube.
A pitot tube is an instrument used to measure the velocity of fluid flow. It works based on Bernoulli's principle, which states that the total energy at a point in a moving fluid remains constant. The pitot tube measures stagnation pressure and uses it to calculate the velocity of the fluid.
Step 2: Evaluate each option.
Pressure: While pressure is involved, it's not the primary measurement.
Velocity of flow: Correct; this is the main purpose of a pitot tube.
Difference in pressure: This is an intermediate step in measuring velocity.
Density: Not measured by a pitot tube.
Step 3: Select the correct option.
Based on its design and working principle: $$ \boxed{\text{Velocity of flow}} $$