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FIRE3
stand pipe and water supply
60
Other
Undergraduate 2
03/31/2010

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Cards

Term
What is the freezing point of Water?
Definition
32 degrees
Term
what is the boiling point of water
Definition
212 degrees
Term
what two natural laws of physics is water affected by?
Definition
Law of specific heat and law of latent heat of vaporation
Term
what is specific heat?
Definition
a measure of the heat absorbing capacity of a substance
Term
a BTU will
Definition
raise the temperature of 1 pound of water 1 degree fahrenheit
Term
what is latent heat?
Definition
the quantity of heat absorbed by a substance when it changes a from a liquid to a vapor
Term
How many BTUS is needed to convert water to steam?
Definition
970
Term
what is viscosity?
Definition
the tendency of a liquid to possess internal resistance to flow
Term
What is specific gravity?
Definition
the density of liquids in relation to water. water is given a value of 1
Term
what is pressure?
Definition
pressure per square foot PSF or pounds per square inch PSI
Term
what are forces?
Definition
a simple measure of weight and is usually expressed in pounds or kilos
Term
what is the weight of 1 cubic foot of water?
Definition
approximately 62.5 pounds
Term
What is velocity head pressure?
Definition
the speed at which a fluid travels through hose or pipe is developed
Term
first principle of pressure
Definition
fluid pressure is perpendicular to any surface on which it acts
Term
second principle of pressure?
Definition
fluid pressure at rest is the same intensity in all directions
Term
3rd principle of pressure
Definition
pressure applied to a cinfined fluid is transmitted equally in all directions
Term
4th principle of pressure
Definition
pressure of a liquid in an open vessel is proportional to its depth.
Term
5th principle of pressure
Definition
pressure of a liquid in an open vessel is proportional to the density.
Term
6th principle of pressure
Definition
pressure of a liquid on the bottom of a vessel is independant on the shape of the vessel.
Term
What is atmospheric pressure?
Definition
pressure exerted on the earths surface.
Term
what is the atmospheric pressure force
Definition
14.7 psi
Term
what is a common method in measuring atmospheric pressure?
Definition
compare it with a column of mercury
Term
a pressure of 1 psi will raise mercury?
Definition
2.04 in
Term
what is vacuum
Definition
any pressure less than atmospheric pressure
Term
what is perfect vacuum?
Definition
absolute zero pressure
Term
what is another term for expressing pressure?
Definition
head
Term
what is elevation head?
Definition
the height of a water supply above the discharge orifice.
Term
what is static pressure?
Definition
stored potential energy available to force water through pipe, fire hose, adapters. static means at rest
Term
what is normal operating pressure
Definition
pressure found in a water distribution system during normal consumption demands.
Term
what is residual pressure?
Definition
that part of the total available pressure not used to overcome friction loss or gravity while forcing water through
Term
what is flow pressure?
Definition
forward velocity pressure while water is flowing.
Term
what is elevation?
Definition
refers to the center line of the pump or the bottom of a static water supply source above or below ground level
Term
what is altitude
Definition
the position of an object above or below sea level
Term
what is friction loss?
Definition
part of the total pressure lost while forcing water through pipe.
Term
first principle of friction loss
Definition
friction loss varies with the length of the hose
Term
second principle of friction loss
Definition
when hoses are the same friction loss varies with increase in pressure
Term
third principle of friction loss
Definition
friction loss varies with diameter of hose
Term
4th principle of friction loss
Definition
friction loss is the same regardless of the pressure on the water
Term
whats a physical property of water
Definition
its incompressible same volume at both ends
Term
what are some means of moving water?
Definition
direct pumping system, gravity system, and combination
Term
What is a dead-end hydrant?
Definition
a hydrant that receives water from only one direction
Term
what is a circulating feed or looped line?
Definition
a hydrant that receives from two or more directions
Term
Primary feeder
Definition
Main large pipes
Term
secondary feeders
Definition
intermediate pipes that reinforces grip
Term
distributors
Definition
main aupplier for hydrant
Term
what is a simple loop
Definition
there is exactly one inflow point and one outflow point
Term
what is a complex loop?
Definition
also referred to as a loop. more than one inflow.
Term
what types of valves are there?
Definition
indicating and non indicating
Term
what are two common indicator valves
Definition
post indicator valve and outside stem and yoke valve
Term
what is the most common hydrant in the US?
Definition
Dry-barrel
Term
what is thre common variety of a dry barrel hydrant?
Definition
two 2 1/2in outlets and one 4 1/2in outlet called a pumper or steamer
Term
red hydrant
Definition
less than 500 gpm
Term
orange hydrant
Definition
500-999 gpm
Term
green hydrant
Definition
1000-1499 gpm
Term
light blue hydrant
Definition
1500 or more gpm
Term
nfpa for standpipes
Definition
14
Term
class 1 standpipe
Definition
for us. require 500 gpm with 100 gpm residual
Term
class 2 standpipe
Definition
for them. requires 100 gpm at the most remote connection.
Term
class 3 standpipe
Definition
both
Term
what is the duration of water supplies for exterior fire fighting
Definition
2 hours for up to 2500 gpm
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