Sum of Static and Velocity Pressure is called what?

Sum of Static and Velocity Pressure is called what?

• A. Sum of Static and Velocity Pressure
• B. Sum of Dynamic and Static Pressure
• C. Sum of Velocity and Ambient Pressure
• D. Sum of Positive and Negative Pressure

Answer: (A)

In fluid flow, the total or stagnation pressure at a point is what you get when you combine the pressure from the fluid being at rest (static pressure) with the pressure arising from the fluid’s motion (velocity pressure). Velocity pressure, defined as ½ ρ v^2, represents the energy associated with the flow’s speed. When flow is slowed to zero, this velocity pressure is converted to additional static pressure, giving the total pressure. Therefore, the sum of static pressure and velocity pressure is the total (stagnation) pressure, which is the concept tested here. While dynamic pressure is another common term for the same fluid-motion component, the option using velocity pressure aligns with the wording used in many IH contexts, making it the best match.

In fluid flow, the total or stagnation pressure at a point is what you get when you combine the pressure from the fluid being at rest (static pressure) with the pressure arising from the fluid’s motion (velocity pressure). Velocity pressure, defined as ½ ρ v^2, represents the energy associated with the flow’s speed. When flow is slowed to zero, this velocity pressure is converted to additional static pressure, giving the total pressure. Therefore, the sum of static pressure and velocity pressure is the total (stagnation) pressure, which is the concept tested here. While dynamic pressure is another common term for the same fluid-motion component, the option using velocity pressure aligns with the wording used in many IH contexts, making it the best match.