Inspector Chapter 11 Flashcards
Lakes, Reservoirs, ponds, rivers, streams, aquifers, wells, or springs:
Water Supply Sources
Purification or desalination Plants:
Processing or Treatment facilities
These are responsible for the movement of water:
Pumps
Storage tanks, control valves, piping systems, and hydrants are examples of:
Water Distribution and Storage Systems
The part of an overall water supply system that receives the water from a water source and delivers it by means of pumps or gravity to the area to be served.
Distribution System
Historically, many significant fire losses can be traced, at least in part, to the failure of a _____ that municipal fire departments have used at an incident.
Private Water Supply System
A _____ may be an open lake or pond or an enclosed structure similar to a tank.
Reservoir
_____ are located at ground level and provide a water supply source for fire pumps.
Suction Tanks
_____ can be used for limited private fire protection systems.
Pressure Tanks: They contain water under air pressure that is released when the system requires it.
Pressure tanks should be provided with:
Low/high water level and air-pressure supervision gauges or devices.
_____ are used to stabilize or balance the pressures on distribution systems at the times of peak demands.
Gravity Tanks
A Gravity tank has to be ____ hight to generate a pressure of _____.
100 Feet; 43 psi
Three methods for moving water through a water system are:
Gravity, Direct pumping, and a combination system using both direct pumping and gravity
Water supply system that relies entirely on the force of gravity to create pressure and cause water to flow through the system.
Gravity System
Water supply system supplied directly by a system of pumps rather than elevated storage tanks.
Direct Pumping System
Water supply system that is a combination of both gravy and direct pumping systems.
Combination System
Most communities use a _____.
Combination System
The _____ consists of a network of pipes, storage tanks, control valves, and hydrants throughout the community or service area that carry the water under pressure to the point of use.
Water Distribution System
The term(s) _____ or _____ describe the interlocking network of water mains that compose a water distribution system.
Grid/Gridiron
A principal pipe in a system of pipes for conveying water, especially one installed underground.
Water Main
Large pipes, also known as arterial mains, with relatively widespread spacing:
Primary Feeders
Fire Hydrants are rarely attached directly to these:
Primary Feeders
Intermediate pipes that interconnect with the primary feeder lines to create a grid.
Secondary Feeders.
_____ can isolate each secondary feeder.
Control Valves
Small water mains that serve individual fire hydrants and commercial/residential consumers.
Distributors
The ____ or _____ system is designed to provide constant pressure or flow when pipes or the grid need repair.
Grip or Loop
Valves should be exercised at least _____ to verify that they are in good working conditions.
Once a Year
Valves in water systems are usually _____ and located udnergound.
Nonindicating
Control valve with a solid plate operated by a handle and screw mechanism; rotating the handle moves the plate into or out of the waterway.
Gate Valve
Control valve that uses a flat circular plate in a pipe that rotates 90 degrees across the cross section of the pipe to control the flow of water.
Butterfly Vavle
Hydrants are required to have at least one large _____ or _____ outlet, often referred to as the steamer connection or pumper outlet connection.
4- or 4 1/2 inch.
Large-diameter outlet, usually 4 1/2 inches, at a hydrant or at the base of an elevated water storage container.
Steamer Connection.
A hydrant is required to have two outlet nozzles for _____ couplings.
2 1/2 inch.
Hydrant inspections should occur at least:
Once a year.
Hydrants may be painted _____ to indicate that contain nonpotable water.
Violet
Pressure remaining at a given point in a water supply system while water is flowing:
Residual Pressure
Pressure at a given point in a water system when no water is flowing:
Static Pressure
Tests that are repeated at the same locations _____ may reveal a loss in the carrying capacity of water mains, closed or partial closed valves, and a need for improving certain arterial mains.
Semiannually
Instrument that is inserted into a flowing fluid to measure the velocity pressure of the stream
Pitot Tube
Fire hydrant: The clearance between the bottom of the butt (discharge outlet) and the grade should be at least:
15 inches
When using a Pitot tube to test water flow pressure, the blade should be placed into the stream and be approximately _____ away.
One-half the diameter of the opening.
Generally, _____ outlets should be used to conduct hydrant flow tests.
2 1/2 inch
Fire hydrant used during a fire flow test to read the static and residual pressures
Test Hydrant
Fire hydrant from which the water is discharged during a hydrant fire flow test.
Flow hydrant
In general, the test hydrant should be located where? (single hydrant)
Between the flow hydrant and the water source.
In general, the flow hydrant should be wehre? (single hydrant)
Downstream of the test hydrant.
When flow testing multiple hydrants, the test hydrant should be located:
Centrally located relative to the flow hydrants
Amount of pressure that is expected to be available from a hydrant, prior to pumping:
Normal Operating Pressure
When testing available water supply, enough hydrants should be opened to drop the static pressure:
10%
For more accurate results of testing water supply, hydrants should be opened to drop the static pressure:
25%
Growths, crusts, tubercular lump corrosion, or rust on the side walls of water mains:
Encrustations
Mud, clay, leaves, or other foreign matter, dead organisms, and decayed vegetation found mostly in the bottom of water mains:
Sedimentation Deposits
The _____ is a logarithmic scale developed to simplify the process of determining available water in an area.
Fire Flow Chart
