Terms Flashcards
Weight of water
- 5 lbs/ft3
8. 33 lbs/gal
Vacuum
Any pressure less than atmospheric pressure.
Static Pressure
Stored potential energy available to force water through pipe fittings hose and adapters.
BTU
The amount of heat required to raise the temp of 1 pound of water 1 degree.
How many BTU’s absorb 1 degree of water.
970 BTU’s
How many BTU’s absorbed by 1 gallon of water?
1,266 BTU’s
NFPA 1582
Standard on comprehensive occupational medical program for the FD.
NFPA 1002
Standard for fire apparatus driver/operator professional qualifications.
NFPA 1001
Standard for FF professional qualifications
NFPA 1500
Standard on FD occupational safety and health program.
The weight of 1 cubic ft of water.
0.434 lbs
Specific Gravity
The density of liquids in relation to water.
Water = 1
Less than 1 is lighter and floats on water.
More than 1 is heavier and sink in water.
Boiling Point
The temp at which a liquid absorbs enough heat to change to a vapor.
Latent heat of vaporization
The quantity of heat absorbed by a substance when it changes from a liquid to a vapor.
Specific Heat
The measure of the heat-absorbing capacity of a substance. Water- 1 CaCl- .70 CO2- .12 CO2- .19 Sodium BiCarb- .22
Altitude
The position of an object above or below sea level.
Atmospheric Pressure
Pressure exerted by the atmosphere at sea level.
14.7 psi
Elevation Pressure
Elevation pressure loss and pressure gain.
Elevation
The center line of the pump or the bottom of a static water source above or below ground level.
Friction Loss
That part of the total pressure lost while forcing water through pipe, fittings, hose, and adapters.
Flow Pressure
That forward velocity pressure at a discharge opening while water is flowing.
Head
The height of a water supply above the discharge orifice.
Head Pressure
The result of dividing the number of feet that the water supply is above the discharge orifice by 2.304
Negative Pressure
Gauge readings of less than 0 psi
