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Questions and Answers
What must be true about the energy at point A to move liquid to point B?
What must be true about the energy at point A to move liquid to point B?
- It must be equal to that at point B.
- It must be lower than at point B.
- It must be independent of point B.
- It must be higher than at point B. (correct)
How can the flow through a system be increased?
How can the flow through a system be increased?
- By increasing resistance in the system.
- By increasing pressure at the upstream point. (correct)
- By increasing pressure at the downstream point.
- By decreasing pressure at the upstream point.
What is the term used for the difference in pressure between two points at the same elevation in a fluid system?
What is the term used for the difference in pressure between two points at the same elevation in a fluid system?
- Flow resistance.
- Delta P. (correct)
- Hydraulic gradient.
- Dynamic pressure.
When delta P increases, what happens to the rate of flow?
When delta P increases, what happens to the rate of flow?
Why are mass flow measurements considered more accurate than volume flow measurements?
Why are mass flow measurements considered more accurate than volume flow measurements?
What happens to velocity of fluid as it approaches an orifice plate?
What happens to velocity of fluid as it approaches an orifice plate?
What measurement devices utilize principles of fluid dynamics to determine flow rate?
What measurement devices utilize principles of fluid dynamics to determine flow rate?
Who was the French mathematician and engineer credited with the development of the modern mass flow meter?
Who was the French mathematician and engineer credited with the development of the modern mass flow meter?
What is the significant element that must be included in the rate of flow?
What is the significant element that must be included in the rate of flow?
Which of the following is NOT a factor that affects fluid flow in a pipeline?
Which of the following is NOT a factor that affects fluid flow in a pipeline?
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Study Notes
Fluid Flow
- To move a liquid from point A to point B, the energy at point A must be higher than at point B.
- The flow through a line can be increased by increasing the pressure at point A or decreasing the pressure at point B.
- The difference in pressure between two points at the same elevation caused by the flow of fluid in a system is called pressure drop or delta P.
- The delta P for the first pipe is 3 psig.
- The delta P for the second pipe is 4 psig.
- When delta P increases, the rate of flow increases. When delta P decreases, the rate of flow decreases.
- True. The rate of flow must have the element of volume and a unit of time. Mass flow measurements are more accurate than volume flow measurements because they are not affected by changes in density or temperature.
- Velocity is faster upstream of an orifice plate.
- Venturi tubes, pitot tubes, and flow nozzles all use pressure differential to determine flow rate.
- The French mathematician, mechanical engineer, and scientist responsible for the mass flow meter in use today is Gaspard Gustave de Coriolis.
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