CFD Pump Theory Chapter 1 Flashcards
What is the chemical composition of Water?
Two Hydrogens and one Oxygen atom
True or False: Water is incompressible?
True (For practical purposes)
When is water at its heaviest density?
When it’s in a solid state.
The inverse is true when in a gaseous state
What is specific heat?
The measure of heat absorbing capacity of a substance
What is a calorie?
The amount of heat required to raise the temperature of 1 gram of water 1 degree
What is Latent heat of Vaporization?
The quantity of heat absorbed by a substance when it changes from a liquid to a vapour at 100 degrees
For every litre of water, how many kilocalories of heat is required to convert water to steam?
540 additional Kilocalries
True or False: The speed at which water absorbs heat increases in proportion to the water surface area exposed to heat?
True
How much can water expand when converting to steam at 100 degrees?
1700x
What is specific gravity?
The density of liquids in relation to water (a value of 1) where lighter than water liquids are less than 1 and heavier liquids are more than 1.
True or False: Most flammable liquids have a specific gravity more than 1?
False: Most flammable liquids have a specific gravity less than 1 and float on water
What is force?
A push or pull of an object resulting from the objects interaction with another object
What is velocity?
The speed at which a fluid travels through a hose or pipe, it is determined by the pressure upon that fluid.
What is the 1st principle of Pressure?
Fluid pressure is perpendicular to any surface on which it acts
What is the 2nd principle of Pressure?
Fluid pressure at any point in a fluid at rest is the same intensity in all directions
What is the 3rd principle of Pressure?
Pressure applied to a confined fluid from without is transmitted equally in all directions
What is the 4th principle of Pressure?
The pressure of a liquid in an open vessel is proportional to its depth
What is the 5th principle of Pressure?
The pressure of a liquid in an open vessel is proportional to the density of the liquid
What is the 6th principle of Pressure?
The pressure of a liquid on the bottom of a vessel is independent of the shape of the vessel
What is Atmospheric Pressure?
The depth and density of the atmosphere exerting pressure on everything on earth
Where is atmospheric pressure at its greatest?
At low altitudes. Sea level is standard at 101kPa
What is head Pressure?
The height of the water supply above of below the discharge orifice
What is static pressure? (At rest)
Stored potential energy available to force water through the pipes, fitting, or nozzle etc.
What is Normal Operating Pressure?
Pressure found in a water distribution system during normal consumption
