Questions and Answers
How many classifications of standpipes are there?
3
What are the classifications of standpipes?
Class I (Firefighters), Class II (Trained Building Occupants), Class III (Combination)
What Class of standpipe system is primarily for use by firefighters trained in handling large hand lines (2 1/2-inch hose)?
Class I (Firefighters)
What class of standpipe is primarily designed for use by trained building occupants or by fire department personnel?
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What class of standpipe combines the features of Class I and Class II systems?
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What are the 5 types of standpipe systems?
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What type of standpipe system contains water in the system at all times?
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What type of standpipe system contains air or nitrogen under pressure?
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What type of standpipe system has empty pipe connected to a permanent water supply?
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What type of standpipe system contains no water in the system?
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What type of standpipe system maintains water from a domestic fill connection?
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What does the Canadian building code and fire codes not accept?
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What is the current NFPA 14 minimum requirement for residual pressure at the fire hose outlet?
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What type of pressure regulating device consists of a simple restricting orifice?
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What type of pressure regulating device is preferred for managing excessive pressure?
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What type of pressure regulating device uses a spring mechanism to balance pressure?
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Current practice is to locate fire hose valves so that any part of a floor is within ____ of the standpipe hose connection.
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A diesel engine is required to be tested ____ by running it for at least ____ minutes.
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Study Notes
Classifications of Standpipes
- There are three classifications of standpipes: Class I, Class II, and Class III.
- Class I: Designed for firefighters with 2 1/2-inch hose connections; suitable for advanced fire fighting stages.
- Class II: Intended for trained building occupants, featuring 1 1/2-inch hose connections; may create a false sense of security among occupants.
- Class III: Combines features of Class I and II, offering both 2 1/2-inch and 1 1/2-inch connections for simultaneous use by firefighters and trained occupants.
Types of Standpipe Systems
- Five main types of standpipe systems are recognized: Automatic Wet, Automatic Dry, Semiautomatic Dry, Manual Dry, and Manual Wet.
- Automatic Wet: Water is continuously present; immediately available when hose valve is opened.
- Automatic Dry: Contains pressurized air or nitrogen; water enters upon opening the hose valve.
- Semiautomatic Dry: Features empty pipes; water admitted when activated by a remote control device.
- Manual Dry: No water in system; relies on fire department to supply water through the Fire Department Connection (FDC).
- Manual Wet: Maintains water from a fill connection; requires the fire department to supply water through the FDC.
Regulations and Standards
- Canadian building and fire codes do not accept dry standpipes.
- The current NFPA 14 minimum requirement mandates a residual pressure of 100 psi (700 kPa) at the fire hose outlet.
Pressure Regulating Devices
- Pressure-Restricting Devices: Simple orifice restricts flow, affecting pressure drop based on design and flow.
- Pressure-Control Devices: Preferred for reducing excessive pressure, employing a pilot tube and gauge for automatic flow reduction.
- Pressure-Reducing Devices: Uses a spring mechanism to maintain balance between system pressure and hose line requirements.
Additional Requirements
- Fire hose valves must be located within 130 feet of any part of a floor for accessibility.
- Diesel engines used in fire systems should be tested weekly for at least 30 minutes.
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Description
Test your knowledge on the classification of standpipes and their types with this comprehensive flashcard quiz. Dive into the essential information regarding Class I, II, and III standpipe systems and understand their specific uses for firefighting and building occupants.
