Chapter 2: Water at rest: Hydrostatics Flashcards
Hydrostatics is the study of:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
Water at rest and the science behind that study
1st principle of pressure:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
The pressure at a point in a liquid is applied equally in every direction
Pascal’s Law is:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
The 1st principle of pressure: The pressure at a point in a liquid is applied equally in every direction
Pressure created by the weight of a liquid is not only transmitted downward, but rather:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
Equally in all directions at a given point
2nd principle of pressure:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
The pressure applied on a confined liquid from an external force will be transmitted equally in all directions throughout the liquid without a reduction in magnitude
Which principle of pressure explains why damaging pressure surges (water hammers) can be transmitted over great distances inside a water system?
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
Principle 2. The pressure applied on a confined liquid from an external force will be transmitted equally in all directions throughout the liquid without a reduction in magnitude
3rd principle of pressure:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
The pressure created by a liquid in an open container is directly proportional to the depth of the liquid
Scientifically, pressure is:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
A function of a given force applied over a specific area
When a body of liquid is static, the force it generates is equal to its:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
Weight
4th principle of pressure:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
The pressure created by a liquid in an open container is directly proportional to the density of the liquid
If we combine principles 3 and 4, we can determine that pressure created by a static liquid is equal to its:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
Weight multiplied by its height
5th principle of pressure:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
The pressure at the bottom of a container is not affected by the shape or volume of the container
The 5th principle of pressure only applies to pressure, not __________:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
Force
Head is:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
Pressure expressed in units of feet of water instead of psi
Head pressure is:
[Fire Service Hydraulics and Water Supply: Chapter 2: Water at rest: Hydrostatics]
The amount of pressure created by the height of a column of water, more commonly referred to in the fire service as elevation pressure
