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20 Cards in this Set

  • Front
  • Back
What are the four fundamental components of a water system?
-Source of water supply
-Means of moving water
-Water processing/treatment facilities
-Water distribution system, incl. storage
What are the three methods of moving water in a system?
-Direct pumping system
-Gravity system
-Combination system
A fire hydrant that receives water from only one direction is a _______.
Dead-end hydrant.
A fire hydrant that receives water from two or more directions is a _______.
Circulating feed or looped line.
A distribution system that provides circulating feed from several mains constitutes a _______.
Grid system.
A grid system consists of what three components?
-Primary feeders
-Secondary feeders
Valves for water systems are broadly divided into what two types?
Indicating and Nonindicating
Name two common indicator valves:
-Post Indicator Valv (PIV)
-Outside Screw & Yoke (OS&Y)
What are the four kinds of water pressure, and how is pressure measured?
-Static pressure
-Normal operating pressure
-Residual pressure
-Flow pressure
-Pressure = force per unit area
Define 'static pressure'.
Non-flowing water. Potential energy available to force water through pipe, hose, etc. Also defined as normal pressure existing in system prior to flow hydrant being opened.
Define 'normal operating pressure'.
Pressure in a water system during periods of normal consumption demand (average of total amount used per day per anum).
Define 'residual pressure'.
Pressure left in a distribution system when flowing water, i.e., that part of the total available pressure not used to overcome friction/gravity.
What are the two types of hydrants?
Hydrant color codes: name the four colors and their corresponding GPM rates.
-Light Blue: At least 1,500 gpm
-Green: 1,000-1,499 gpm
-Orange: 500-999 gpm
-Red: Less than 500 gpm
Define 'fire stream'.
A stream of water or other extinguishing agent after it leaves a nozzle until it reaches the desired point.
At 212 degrees (F), water expands how many times its original volume?
Fire streams are classified into what three sizes?
-Low-volume (<40 gpm)
-Handline (1.5-3inch hose, 40-350 gpm)
-Master (>350 gpm)
What are the three patters of fire stream?
What are the three ways in which foam extinguishes/prevents fire?
-Separating (fuel and fire)
-Cooling (fuel and surfaces)
-Suppressing (smothering - prevents release of flammable vapors)
Foam is especially effective on the two basic categories of flammable liquids, which are:
-Hydrocarbon fuels
-Polar solvents