S-12 CITYWIDE SPRINKLER SYSTEMS FINAL EXAM PREP 2025/2026 ACCURATE QUESTIONS WITH CORRECT DETAILED ANSWERS || 100% GUARANTEED PASS NEWEST VERSION

S-12 CITYWIDE SPRINKLER SYSTEMS FINAL EXAM PREP 2025/2026 ACCURATE QUESTIONS WITH CORRECT DETAILED ANSWERS || 100% GUARANTEED PASS NEWEST VERSION 1. Where are gauges located on a wet pipe sprinkler system? - ANSWER On the water supply and the service side. 2. What is the retard chamber for? - ANSWER It pre-fills with water during surges prior to allowing water to the electronic alarm thus preventing false alarms. its piped out from the supply side of a wet pipe sprinkler under the clapper or before the clapper. 3. What is the purpose of a one way clapper? - ANSWER to prevent water from re entering the water supply. 4. what is an inspectors test valve? and where is it usually located? - ANSWER An inspectors test valve is a valve used to drain the system tricking it into thinking a sprinkler head set off. This is used to test if the system is working. This system is located at the farthest branch of a sprinkler system. 5. Glass bulb sprinkler - ANSWER operated by heat breaking a glass bulb filled with a non freezing liquid with diameters that vary form 3 mm for quick response to 5 mm for standard response 6. hose valve - ANSWER valve to additional hose connection 7. hydraulic placard - ANSWER sign attached to a hydraulically calculated sprinkler system indicating the design density, required gallons per minute and pressure for the system to operate properly 8. hydraulically calculated systems - ANSWER method of sizing auto sprinkler piping using a prescribed amount of water to be distributed over a specific area. 9. impairment coordinator - ANSWER in charge of safety during out of service systems 10. intermediate level sprinkler - ANSWER sprinkler equipped with integral shields to protect the operating elemtn form discharge from sprinklers installed at higher elevations 11. large orifice sprinkler - ANSWER sprinkler head with orifice size equal or greater than 3/4 and less than 1 inch 12. listed device - ANSWER A fire protection component that has been tested to perform under parameters specified for its use by a nationally recognized testing agency. Underwriter's Laboratory (UL) and Factory Mutual (FM) are the two most common. 13. Master Pressure Reducing Valve - ANSWER A pressure reducing valve installed to regulate pressures in an entire fire protection system and/or standpipe system zone. 14. Main Drain - ANSWER The primary drain connection located on the system riser and also utilized as a flow test connection. 15. Microbiologically Influenced Corrosion (MIC) - ANSWER Corrosion caused by the presence of microbes in the water supply that over time attack the interior of metallic piping and cause leaks, pitting, and blockages. 16. Conventional Sprinkler - ANSWER A sprinkler that directs 40% to 60% of the water initially in a downward direction and is designed to be installed with the deflector in either the upright or pendent position. 17. Pendent Sprinkler - ANSWER A sprinkler designed to be installed in such a way that the water stream is directed downward against the deflector. 18. Pintle Screws - ANSWER A visual indicating device required for sprinklers manufactured prior to 1999 identifying small orifice sprinklers and large orifice sprinklers where orifice size is different than the nominal thread size of the sprinkler head. 19. Pipe Schedule Systems - ANSWER A method of sizing piping based upon the number of sprinkler heads and the occupancy of the protected area. 20. Preaction Sprinkler System - ANSWER A sprinkler system employing automatic sprinklers that are attached to a piping system that contains air that may or may not be under pressure, with a supplemental detection system installed in the same areas as the sprinklers. 21. Pressure Control Valve - ANSWER A pilot operated pressure reducing valve that may be used with a fire or booster pump designed for the purpose of preventing the incoming water supply pressure from dropping below a set pressure. 22. Pressure-Reducing Valve - ANSWER A valve designed for the purpose of reducing the downstream water pressure under both flowing (residual) and nonflowing (static) conditions. 23. Pressure Relief Valve - ANSWER A valve designed for the purpose of releasing excess air or water pressure from the Fire Protection Piping System. 24. Pressure Tank - ANSWER A tank using air pressure to supplying water for water-based fire protection systems. Tank contents to be maintained at one third air to two thirds water. 25. Quick Response Sprinkler Head - ANSWER A sprinkler having a fusible link with a response time index (RTI) of 50 or less. 26. Recessed Sprinkler - ANSWER A sprinkler in which all or part of the body, other than the shank thread, is mounted above the ceiling. 27. Residential Sprinkler - ANSWER A type of fast response sprinkler that has been specifically tested to enhance survivability in the room of fire origin and listed for use in dwelling units. 28. Response Time Index (RTI) - ANSWER A measurement of the thermal sensitivity of a sprinkler head expressed in (meters-seconds) 1/2. 29. Supervisory signal - ANSWER A signal indicating the need for action or the use of such device in connection with the supervision of fire alarm systems or the maintenance features of related systems. 30. Small orifice sprinklers - ANSWER A sprinkler head with and orifice size smaller than 1⁄2" 31. Solder Link Sprinkler - ANSWER A sprinkler operated by the melting of a metal link, they vary in size and configuration for quick response and standard response sprinklers. The smaller the size of the link, the faster the sprinkler operates. 32. Spray Sprinkler - ANSWER A type of sprinkler listed for its capability to provide fire control for a wide range of fire hazards. The most commonly used sprinkler since 1953. 33. Standard Response Sprinkler Head - ANSWER A sprinkler having a fusible link with a response time index (RTI) of 80 or more. 34. Supervisory signal-initiating device - ANSWER An initiating device, such as a valve supervisory switch,that triggers a supervisory signal. 35. Testing - ANSWER A procedure used to determine the status of a system as intended by conducting periodic physical checks on water based fire protection systems such as waterflow tests, fire pump tests, alarm tests, and trip tests of dry pipe, deluge, or preaction valves. These tests follow up on the original acceptance test at intervals specified in the appropriate chapter of NFPA #25, 2002 edition. 36. Upright Sprinkler - ANSWER A sprinkler designed to be installed in such a way that the water spray is directed upwards against the deflector. 37. Water Spray Fixed System - ANSWER A special fixed pipe system connected to a reliable fire protection water supply and equipped with water spray nozzles for specific water discharge and distribution over the surface or area to be protected. The piping system is connected to the water supply through an automatically or manually actuated valve that initiates the flow of water. An automatic valve is actuated by operation of automatic detection or manual release equipment installed in the same areas as the water spray nozzles. (In special cases, the automatic detection system may also be located in another area.) 38. PREACTION SPRINKLER SYSTEMS - ANSWER designed for situations where there is danger of serious water damage. Water damage is usually caused by damaged sprinklers or broken piping. Under normal conditions there is no water in the piping. The air in the piping may or may not be is under pressure. A preaction valve prevents the water from entering the system. The valve is automatically opened when a fire detection system discovers that there is a fire or smoke condition. The preaction valve is tripped by the fire detection system before any of the sprinkler heads open. A supervisory device signals when the valve is opened. The preaction valve can also be operated manually. 39. DELUGE SPRINKLER SYSTEMS - ANSWER equipped with open sprinkler heads designed to wet down an entire area involved in a fire. This system is needed when there is danger of a fire rapidly spreading throughout the building. The deluge system will slow down the spread of the fire. Deluge systems are suitable for hazardous occupancies. This includes buildings in which flammable liquids or other hazardous materials are handled or stored. The sprinkler heads in the deluge system are open at all times. Under normal conditions there is no water in the piping. The air in the piping is not under pressure. A closed control valve prevents water from flowing into the system. A fire detection device automatically opens the control valve when a fire is identified. A supervisory device signals when the valve is opened. When the valve is opened water flows into the system. The water is then discharged out all of the sprinkler heads. The water control valve may also be opened manually. 40. NON-AUTOMATIC DRY SPRINKLER SYSTEMS - ANSWER ll pipes are normally dry. Water is supplied when needed by pumping water into the system through the Fire Department connection. Some of these systems are supplied by manual operation of a water control valve and may be equipped with sprinklers with or without fusible links. There are several non-automatic systems: 1) Perforated pipe systems - a single line of piping drilled at intervals for water discharge. These systems are usually found in basements or other areas difficult to reach in fire fighting operations. 2) Open fixed spray nozzles for transformer vaults or other hazardous areas; 3) exterior exposure sprinklers (or window sprinklers) use open sprinkler heads to form an external water curtain on the walls of a building, and 4) Foam supply systems are used for the protection of special hazardous occupancies. 41. Curb Valves - ANSWER Gate valves of the non-indicating type are provided in water distribution systems. Gate valves allow the sprinkler system to be shut off for repairs or maintenance. Such valves are normally a non-rising stem type. They are operated using a special key wrench. A valve box is located over the valve to keep dirt from the valve. The valve box also provides a convenient access point for the valve wrench to the valve nut. A complete record should be made for each valve in the system. This record should include the exact location, the date it was installed, the make, the direction of opening, number of turns to open, and any maintenance that was performed. The control valve for the building may also be on the outside wall or attached to an upright post, known as a post indicator valve (PIV). The building or section of the building controlled by the valve is usually marked on the post. The position of this valve (open or closed) is shown through a telltale opening in the post. On some posts, a padlock must first be opened to release the operating wrench or wheel handle. 42. Fire Pumps - ANSWER used as a main water supply source for sprinkler systems. They may also be used in combination with gravity tanks to supply sprinkler system. Fire pumps are designed to take the water from a supply source and then discharge the water into the fire protection system under pressure.