Q1: In case of venturimeters, friction losses are about __________ percent of maximum velocity head.

ANS:A - 2

In venturi meters, friction losses typically amount to about 8 percent of the maximum velocity head. Here's why:

• Venturi Meter: A venturi meter consists of a converging inlet section, a throat, and a diverging outlet section. As fluid flows through the venturi meter, there is a pressure drop due to the converging and diverging sections and friction losses along the pipe walls.
• Friction Losses: Friction losses in venturi meters are primarily due to the viscous resistance of the fluid as it flows through the meter. These losses contribute to a reduction in the total kinetic energy of the fluid, which manifests as a pressure drop.
• Percentage of Maximum Velocity Head: The friction losses in venturi meters typically amount to approximately 8 percent of the maximum velocity head (the head corresponding to the velocity at the throat of the venturi).