ANS:C - Pitot tube

A pressure gauge is used for measuring the static pressure exerted on the wall by a fluid flowing parallel to the wall in a pipeline. Here’s why:

• Pressure Gauge: It measures the static pressure of a fluid at a specific point, including the pressure exerted on the walls of a pipeline. It provides a direct reading of the static pressure.

• Venturimeter: It is used to measure the flow rate of the fluid by reducing the cross-sectional area of the flow path, which causes a change in the fluid velocity and pressure.
• Pitot Tube: It measures the total pressure (static plus dynamic pressure) in a flowing fluid and is typically used to determine the fluid flow velocity by comparing the total pressure to the static pressure.
• Orificemeter: Similar to the venturimeter, it measures the flow rate of the fluid by causing a pressure drop across an orifice plate inserted into the flow path.