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61 Cards in this Set
- Front
- Back
What is the term for locations from which an engine can draft out of a static water supply source? |
Drafting / Fill Site |
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Almost any static source of water can be used for drafting if it is: |
Sufficient in quantity and not contaminated |
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Before opening a portable tank, a ___________ should be placed on the ground to help protect the liner once the water is dumped into it. |
Salvage cover or Heavy tarp |
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Portable water tanks should be positioned in a location that allows easy access from ___________ |
Multiple directions |
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Jet dumps ______ the flow rate of any dump valve |
Increase |
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The interlocking network of water mains that compose a water distribution system |
Grid |
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The term for an arrangement of water mains that deliver water to hydrants from more than one direction at the same time |
Grid |
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Fire Hydrant markings and colors are used to designate ________ |
Flow Capacity |
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The smallest pipes in a water distribution system which deliver the water to the homes and hydrants on individual streets are called _________ |
Distributors |
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The most common water distribution system is a ________ system |
Combination System (Pumped/Gravity) |
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_______ hydrants receive water from only one direction |
Dead-End |
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The two major hydrant types are ______ barrel and _______ barrel |
Wet Barrel and Dry Barrel |
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Fire hydrant that receives water from two or more directions |
Circulating Feed |
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On a dry barrel hydrant, the valve that controls water flow to all outlets is located at the _______ of the hydrant |
At the Base or Foot |
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How is the amount of water a community needs for both domestic use and protection calculated? |
Based on History of Consumption and Estimates of Anticipated Needs |
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What are the 3 methods for moving water through the system? |
1. Gravity
2. Direct Pumping
3. Combination Systems |
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This system delivers water from the source or the treatment plant to the distribution system without pumping equipment |
Gravity System |
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The difference if the height of the water source and the point of use creates __________ |
Elevation Pressure |
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Gravity pressure is adequate only when the primary water source if located more than ______ feet higher than the highest point in the water distribution system |
100 Feet |
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Alpine Lake or Mountain Reservoir are examples of true ________ systems, which supply water to consumers below |
Gravity Systems |
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Water supply system supplied directly by a system of pumps rather than elevated storage tanks |
Direct Pumping System |
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Where are most direct pumping systems found? |
Agricultural or Industrial Settings |
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What is the main disadvantage of Direct Pumping Systems? |
Total dependence on pumps and electricity |
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Water supply system that uses a combination of both gravity and direct pumping systems |
Combination System |
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A principal pipe in a system of pipes for conveying water, especially one installed underground |
Water Main |
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When water flows through any pipe, its movement causes ________ that reduces water pressure |
Friction |
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What are the 3 types of Water Mains |
1. Primary feeders
2. Secondary Feeders
3. Distributors |
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These mains convey large quantities of water in the distribution system and supply secondary feeders |
Primary Feeders |
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Intermediate pipes that connect with the primary feeder lines and create a grid |
Secondary Feeder |
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_____________ can be used to isolate each secondary feeder |
Control Valves |
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To ensure a sufficient supply, ____ or more primary feeders should run from the source of supply to the high risk and industrial districts of the community along seperate routes |
2 |
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What is an advantage of the grid system? |
High demand in one area does not reduce water flow in other areas |
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Today _____ inch pipe is often the minimum size used |
8 inch |
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Gravity Tank capacities range from _______ gallons to over ___________ gallons |
5,000 gallons to over a million gallons |
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What are the two types of valves generally used in public water supply systems? |
Isolation Valves and Control Valves |
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Control valve with a solid plate operated by a handle and screw mechanism; rotating the valve moves the plate into or out of the waterway |
Gate Valve |
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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 Valve |
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The maximum lengths for valve spacing should be ____ feet in high value districts and ____ feet in other areas as recommended by Commercial Risk Services, Inc |
500 Feet; 800 Feet |
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Isolation valves should be tested at least _________ |
Once a year |
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____________ are generally located on municipal easement and below ground |
Isolation Valves |
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All valves are hydrants are opened by rotating the stem or operating nut to the __________ |
Left or Counterclockwise |
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Rotating the stem or operating nut to the ___________ closes the valve or hydrant |
Right or Clockwise |
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Isolation valves for private water supply systems are usually ___________ valves |
Indicating-Type Valves |
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An indicating valve shows whether the gate seal is ______, ______, or __________ |
Open; Closed; Partially Closed |
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What are 2 common indicating valves? |
- Post Indicator Valve - Outside Stem and Yoke Valve |
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The __________ valve is a hollow metal post that houses the valve stem |
Post indicator Valve |
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The water ___________ determines the quantity of water that the facility is using for billing purposes |
Flowmeter |
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The ______________ prohibits any water from flowing back into the public water system |
Backflow preventer |
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Fire Hydrants should not be spaced more than ____ feet apart in high value districts |
300 Feet |
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Hydrants should be located at ___________ intersections |
Every Other |
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Every building on a given street should be with ____________ of a hydrant |
One Block |
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__________ loss reduces the volume and pressure of water available from fire hydrants |
Friction |
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A distribution system that provides circulating feed from all directions is called a __________ |
Grid System |
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__________ can provide a consistent volume of water under constant pressure |
Fire Hydrants |
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_________ hydrants receive water from only one direction, whereas ___________ hydrants receive water from two directions |
Dead-End; Circulating-Feed |
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In general, all fire hydrant bonnets, barrels and foot pieces are made of __________ |
Cast Iron |
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The internal working part of fire hydrants may be made of _________ |
Bronze |
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What are the two main types of fire hydrants? |
Wet Barrel and Dry Barrel |
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Fire Hydrant outlet that is 4 inches in diameter or larger |
Pumper Outlet Nozzle |
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Large-diameter outlet, usually 4 1/2 inches, at a hydrant or at the base of an elevated water storage container |
Steamer Connection |
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What are the 2 components for a standard hydrant discharge outlet? |
1 large (4 or 4 1/2 inches) outlet
and
2 hose outlet nozzles for 2 1/2 inch couplings |