28 Questions
What is the minimum diameter for fire hydrant supply mains?
6 inches
Which piping arrangement is characterized by multiple water pathways?
Grid system
What is the ideal distance between valves in high-value areas?
500 feet
Which type of valve visually shows the position of the valve: fully open, fully closed, or partially closed?
Indicating valve
What are two common indicator valves?
Outside stem and yoke valve and post indicator valve
What type of valve has a yoke on the outside of the structure with a threaded stem that opens or closes the gate inside the valve?
OS&Y
What type of valve has a rubber or a rubber-composition seat that is bonded to the valve body?
Butterfly valve
According to the text, what is the purpose of the larger outlet on a dry-barrel hydrant?
To attach a soft suction line for feeding the pumping apparatus
Why should hydrants be flushed every year?
To ensure they work and clean sedimentation from the pipes
What is the minimum flow and residual pressure requirement for hydrants according to the ISO evaluation procedure?
250 gpm at 20 psi
Which of the following is NOT a common example of a gravity system for water supply?
A system of cisterns that are considered a part of the distribution system
What is the purpose of elevated storage tanks in a combination system?
To provide emergency storage
Which type of properties are private water supply systems most commonly found on?
Commercial, industrial, or institutional properties
What is the purpose of a circulating feed or looped line in a distribution system?
To reduce friction loss in the distribution system
What are the primary purposes of private water supply systems?
Providing water for fire protection, sanitary purposes, manufacturing processes, or a combination of these uses
What is the purpose of secondary feeders in a grid system?
To reinforce the grid within the various loops of the primary feeder system
What is a potential issue with private water supply systems that provide nonpotable water for fire protection?
The water may be contaminated
What are some advantages of having separate piping arrangements in a private water supply system?
Ability to isolate systems for inspection, testing, and maintenance
Which component of a water supply system is responsible for removing contaminants from water?
Processing or treatment facility
Which situation could drastically reduce the volume and pressure of water available for fire fighting operations?
All of the above
What is the primary source of water in a direct pumping system?
Primary water source
What is the main factor that determines the water pressure in a gravity system?
Primary water source elevation
According to the International Fire Code®, 2012 edition, Section 507, if a portion of a facility or building is more than 400 feet (120m) from a hydrant, what is required by the fire code official?
On-site fire hydrants and mains
For which occupancies is the distance requirement for hydrants 600 feet (180 m) according to the International Fire Code®, 2012 edition, Section 507?
R-3 and Group U
If a building is equipped throughout with an automatic fire sprinkler system, what is the distance requirement for hydrants according to the International Fire Code®, 2012 edition, Section 507?
600 feet (180 m)
Who has the authority to make decisions on the recommended spacing of hydrants according to the text?
The authority having jurisdiction (AHJ)
What is the distance requirement for hydrants if a portion of a facility or building is less than 400 feet (120m) from a hydrant according to the International Fire Code®, 2012 edition, Section 507?
No specific requirement
What is the distance requirement for hydrants if a portion of a facility or building is 500 feet (150m) from a hydrant according to the International Fire Code®, 2012 edition, Section 507?
400 feet (120m)
Test your knowledge on dry-barrel hydrants and their outlets. Learn about the common features and configurations of these hydrants, including the purpose of the larger "pumper" or "steamer" outlet.
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