A pitot tube is used to measure:

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  1. Pressure
  2. Difference in pressure
  3. Velocity of flow
  4. Discharge
  5. Thrust

Answer (Detailed Solution Below)

Option 3 : Velocity of flow
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The basic principle of pitot tube is that if the velocity of flow is reduced to zero at a certain point, there is an increase in pressure due to conversion of kinetic energy into pressure energy. This pressure is known as stagnation pressure.

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