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22 Cards in this Set

  • Front
  • Back
List the parts of the water distribution system
primary feeders, secondary feeders, distributors, dead-end hydrants, and circulating feed or looped hydrant.
Define Primary Feeders
are large/huge pipes that convey large quantities of water for distribution to smaller mains.
Define Secondary Feeders
are intermediate-sized pipes within the loop of primary feeders that connect the flow to distributors.
Define Distributors
are smaller mains serving hydrants and blocks of communities.
Define Dead-end hydrant
is a hydrant that only receives water from one direction. It will give out less gpm.
Define Circulating or looped hydrant
hydrant that receive water from two or more distributions
The different pipe sizes are
residential 6", business 8" (cross connect with main every 600 feet, and industrial areas are 12".
The types of water main valves
indicating and non-indicating
Define Indicating vales
visually show if valve is open or close, which include post indicator and Outside screw and yoke valve.
Define Non-Indicating valves
are usually buried or in a manhole, and require special wrenches to open and close. The valves may be gated or butterfly.
Define Static pressure
is stored potential energy available to force water through pipes or hose. Also the normal pressure within a system before a hydrant is open or being used else where. This is why it is rarely found.
Define Normal operating pressure
is pressure on a water system during normal use demands.
Define Residual pressure
is pressure left in a water system at a location when water is flowing.
Define Flow pressure
is forward pressure at a discharge opening.
What are the two types of hydrants?
Wet-barrel, and dry barrel
Define Dry-barrel hydrants
are hydrants in areas when freezing occur. The hydrant is long with a pipe that has a valve at the bottom that holds the water below ground and the freeze line. The water above the valve drains in a small hole at the bottom of the hydrant.
» Make sure to completely open a dry and close the dry hydrant.
Define Wet-barrel
is used in areas where freezing is unlikely, and are always filled with water.
List some condition which reduce hydrant effectiveness
including but not limited too obstructions around hydrants, discharge outlets facing the wrong direction, damage by traffic or vandalism, corrosion, improper use of hydrant (not opening fully during uses), and dry-barrel hydrants not draining and freezing.
Define Forward lay
is from the hydrant to the fire
Define reverse lay
is from the fire to the hydrant
The apparatus and equipment necessary for a water shuttle
are a water supply officer, fill site(s), equipment assignments, dump side, and a clear direction of travel.
a. Set up portable tanks in a diamond shape if space is an issue.
b. Position drain downhill
c. Set up siphoning devices.
d. And basically watch out and keep the trucks in order.
List the steps to assemble and connect drafting equipment required for drafting from a static water supply.
a. Find water source.
b. Park pumper near source.
c. Attach hard suction hose to intake on pumper.
d. Be sure that the strainer is attached to hose.
e. Be sure to make complete air tight connections.
f. Donot use a floating strainer, use a ladder to let the strainer rest on to reduce chances of damage.
g. Place strainer in water.
h. Prim the positive pressure until it indicates that a draft is successful.
i. If problems try to tighten connections with a rubber mallet.
j. If still not working the lift of the water may be to great to overcome.