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Heated Definitions
Numbers
Principles of Water
Too Little Too Much
Don't Pressure Me
100
The quantity of heat absorbed by a substance when it changes from a liquid to a vapor.
What is "Latent Heat of Vaporization"
100
When testing road brakes, the length the apparatus should come to a complete stop at at 5 mph.
What is 20 feet
100
For a given velocity, friction loss is approximately the same, regardless of the pressure on the water.
What is Fourth Principle (4th) of Friction Loss
100
Can damage the tire and cause poor road-handling
What is Pressure
100
Forward velocity pressure at the discharge opening
What is Flow
200
Tendency of a liquid to possess internal resistance
What is Viscocity
200
The amount exerted at its base when a 1-square inch column of water is 100 feet high.
What is 43.4 psi
200
The pressure of a liquid is an open vessel and porportional to its depth.
What is Fourth Principle (4th) of Pressure
200
Fuel tank level at all times
What is Three-Quarters (3/4)
200
Pressure found above a the discharge orifice.
What is Head
300
The temperature at which a liquid absorbs enough heat to change to a vapor.
What is Boiling Point
300
The time required to allow air pressure to build to a sufficient level upon starting
What is 60 seconds
300
The pressure of a liquid on the bottom of a vessel is independent of the shape of the vessel.
What is Sixth Principle (6th) of Pressure
300
Being overflated makes the apparatus susceptible to skids.
What are Tires
300
The speed at which fluid travels through hose or pipe
What is Velocity
400
The amount of heat required to raise the temperature of 1 pound of water 1 degree F.
What is BTU or British Thermal Unit
400
According to NFPA, a number of gallons to be considered a mobile water supply apparatus.
What is 1,000
400
If all other conditions are the same, friction loss varies directly with the length of the hose or pipe.
What is First Principle (1st) of Friction Loss
400
Turning the apparatus to this degree for repositioning at a hydrant.
What is Forty-Five (45)
400
Total available pressure
What is Residual
500
A measure of the heat-absorbing capacity of a substance.
What is Specific Heat
500
Historical data shown that all firefighter injuries and deaths in the U.S. are caused by vehicle collisions.
What is 25 % (percent)
500
Fluid pressure at a point in a fluid at rest is the same intensity in all directions.
What is Second Principle (2nd) of Pressure
500
Takes place when an apparatus undergoes a change in speed or direction
What is Weight Transfer
500
Stored potential energy available.
What is Static Pressure