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TFM10 NFPA 24 Test Actual Exam Questions
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Public Hydrant - โโโ ANSWER A valved connection on a water supply system having one or more outlets that is used to supply hose and fire department pumpers with water. Residual Hydrant - โโโ ANSWER The hydrant that is used for measuring static and residual pressures during a flow test Wet-Barrel Hydrant - โโโ ANSWER A hydrant used in areas that are not susceptible to freezing. The barrel of the hydrant is normally filled with water. Private Fire Service Mains - โโโ ANSWER Hydraulic calculations shall show that the main is able to supply the total demand at the appropriate pressure. Mains Not Supplying Hydrants - โโโ ANSWER For mains that do not supply hydrants, pipe sizes less than 6 in nominal size shall be permitted to be used subject to the following restrictions. The main shall supply only the following types of systems - โโโ ANSWER - Automatic sprinkler systems
- open sprinkler systems
- water spray fixed systems
- foam systems
- standpipe systems NFPA 22 - โโโ ANSWER Tanks shall be installed in accordance with Each remote fire department connection shall be designated by a sign as follows:
- โโโ ANSWER - sign shall have a raised or engraved letters at least 1 inch in height on a plate or fitting.
- The sign shall indicate the type of system for which the connection is intended.
6 inches - โโโ ANSWER The connection from the hydrant to the main shall not be less than 32 - 40 inches above final grade - โโโ ANSWER Where post indicator valves are used, they shall be set so that the top of each post is 40 ft - โโโ ANSWER Hydrants shall be located not less than from the building to be protected 18 inches - โโโ ANSWER The center of a hose outlet shall not be less than above final grade AHJ (authority having jurisdiction) - โโโ ANSWER Where hydrants located closer than 40ft to the building, shall be permitted to be used where approved by 12 inches - โโโ ANSWER The center of a hose outlet located in a hose house shall not be less than above the floor 36 Inches - โโโ ANSWER The center of a hose outlet shall not be more than above final grade 250 GPM ( 950 LPM) - โโโ ANSWER Master streams shall be delivered by monitor nozzles, hydrant-mounted monitor nozzles, and similar master stream equipment capable of delivering more than 12 inches - โโโ ANSWER The top of the pipe shall not be buried less than nelow the frost line for the locality. 30 inches - โโโ ANSWER In locations where freezing is not a factor, the depth cover shall not be less than below grade to prevent mechanical damage. 36 inches - โโโ ANSWER Private fire service mains installed under driveways or roadways shall be buried at a minimum depth of 4 ft - โโโ ANSWER Private fire mains installed under railroad tracks shall be buried at minimum depth of 4 ft - โโโ ANSWER Private fire mains installed under large piles of heavy commodities or subject to heavy shock and vibrations shall be buried at a minimum depth of NFPA 13 - โโโ ANSWER Standard for the Installation of Sprinkler Systems 2022
NFPA 20 - โโโ ANSWER Standard for the Installation of Stationary Pumps for Fire Protection NFPA 22 - โโโ ANSWER Standard for Water Tanks for Private Fire Protection NFPA 25 - โโโ ANSWER Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems NFPA 780 - โโโ ANSWER Standard for the Installation of Lightning Protection Systems NFPA 1961 - โโโ ANSWER Standard on Fire Hose NFPA 1963 - โโโ ANSWER Standard for Fire Hose Connections ASME B1.20.1 - โโโ ANSWER Pipe Threads, General Purpose (Inch) ASME B16.1 - โโโ ANSWER Gray Iron Pipe Flanges and Flanged Fittings - CL 25, 125, and 250 ASME B16.3 - โโโ ANSWER Malleable Iron Threaded Fittings - CL150 & CL ASME B16.4 - โโโ ANSWER Gray Iron Threaded Fittings - CL 125 & 250 ASME B16.15 - โโโ ANSWER Cast Copper Alloy Threaded Fittings - CL 125 & 250 ASME B16.18 - โโโ ANSWER Cast Copper Alloy Solder Joint Pressure Fittings ASME B16.22 - โโโ ANSWER Wrought Copper and Copper Aloy Solder Joint Pressure Fittings ASTM A53/A53M - โโโ ANSWER Standard Specification for Pipe, Steel, Black & Hot-Dipped, Zinc-Coated, Welded and Seamless ASTM A135/A135M - โโโ ANSWER Standard Specification for Electric Resistance Welded (ERW) Steel Pipe ASTM A312/312M - โโโ ANSWER Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic SS Pipes ASTM A403/A403M - โโโ ANSWER Specification for Wrought Austenitic SS Pipe Fittings
ASTM A795/795M - โโโ ANSWER Standard Specification for Black and Hot- Dipped Zinc Coated (Galvanized) Welded and Seamless Steel Pipe for FIRE PROTECTION USE ASTM B43 - โโโ ANSWER Specification for Seamless Red Brass Pipe, Standard Sizes ASTM B75/B75M - โโโ ANSWER Specification for Seamless Copper Tube ASTM B88 - โโโ ANSWER Specification for Seamless Copper Water Tube ASTM B251/B251M - โโโ ANSWER Standard Specification for General Requirements for Wrought Seamless Copper and Copper-Alloy Tube ASTM SI10 - โโโ ANSWER American National Standard for Metric Practice AWWA C104/A21.4 - โโโ ANSWER Cement-Mortar Lining for Ductile Iron Pipe & Fittings AWWA C105/A21.5 - โโโ ANSWER Polyethylene Encasement for Ductile-Iron Pipe Systems AWWA C110/A21.10 - โโโ ANSWER Ductile-Iron and Gray-Iron Fittings AWWA C111/A21.11 - โโโ ANSWER Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings AWWA C115/A21.15 - โโโ ANSWER Flanged Ductile-Iron Pipe with Ductile-Iron or Gray-Iron Threaded Flanges AWWA C150/A21.50 - โโโ ANSWER Thickness Design of Ductile-Iron Pipe AWWA C151/A21.51 - โโโ ANSWER Ductile-Iron Pipe, Centrifugally Cast AWWA C153/A21.53 - โโโ ANSWER Ductile-Iron Compact Fittings AWWA C300 - โโโ ANSWER Reinforced Concrete Pressure Pipe, Steel-Cylinder Type AWWA C301 - โโโ ANSWER Prestressed Concrete Pressure Pipe, Steel-Cylinder Type
Fire Department Connection - โโโ ANSWER A connection through which the fire department can pump supplemental water into the sprinkler system, standpipe, or other water-based fire protection systems, thereby supplementing existing water supplies. Fire Pump - โโโ ANSWER A pump that is a provider of liquid flow and pressure dedicated to fire protection. Hose House - โโโ ANSWER An enclosure located over or adjacent to a hydrant or other water supply designed to contain the necessary hose nozzles, hose wrenches, gaskets, and spanners to be used in fire fighting in conjunction with and to provide aid to the local fire department Hydrant Butt - โโโ ANSWER The hose connection outlet of a hydrant Hydraulically Calculated Water Demand Flow Rate - โโโ ANSWER The water flow rate for a system or hose stream that has been calculated using accepted engineering practices Private Fire Service Main - โโโ ANSWER Private fire service main, as used in this standard, is that pipe and its appurtenances on private property (1) between a source of water and the base of the system riser for water-based fire protection systems, (2) between a source of water and inlets to foam-making systems, (3) between a source of water and the base elbow of private hydrants or monitor nozzles, and (4) used as fire pump suction and discharge piping, (5) beginning at the inlet side of the check valve on a gravity or pressure tank Pumper Outlet - โโโ ANSWER The hydrant outlet intended to be connected to a fire department pumper for use in taking supply from the hydrant. Rated Capacity - โโโ ANSWER The flow, either measured or calculated, that is available from a hydrant at the designated residual pressure (rated pressure) System Working Pressure - โโโ ANSWER The maximum anticipated static (nonflowing) or flowing pressure applied to fire protection system components exclusive of surge pressures and exclusive of pressure from the fire department connection
Flow Test - โโโ ANSWER A test performed by the flow and measurement of water from one hydrant and the static and residual pressures from an adjacent hydrant for the purpose of determining the available water supply at that location. Flushing Test - โโโ ANSWER A test of a piping system using flow rates intended to remove debris from the piping system prior to it being placed in service Hydrostatic Test - โโโ ANSWER A test of a closed piping system and its attached appurtenances consisting of subjecting the piping to an increased internal pressure for a specified period of duration to verify system integrity and leak rates An acceptable water supply source - โโโ ANSWER A connection to a reliable waterworks system shall be Hydraulic Calculations - โโโ ANSWER shall show that the main is able to supply the total flow rate at the required design pressure 6 in - โโโ ANSWER (Private Fire Service Mains) For mains that supply fire hydrants, pipe size shall not be less than 1.) Check Valves 2.) Detector Check Valves 3.) Backflow prevention valves 4.) Other similar appurtenances - โโโ ANSWER The following shall not be installed between a fire hydrant and the control valve for that hydrant: Master Streams - โโโ ANSWER shall be delivered by monitor nozzles, hydrant-mounted monitor nozzles, and other equipment capable of delivering more than 250 gpm ( L/min) Master Streams - โโโ ANSWER shall be provided as protection for the following: 1.) Large amounts of combustible materials located in yards
10 ft - โโโ ANSWER Private fire service mains shall not be permitted to extend more than under the building EXCEPT for when they are run in a covered trench. valve - โโโ ANSWER Where piping is installed in a trench as permitted by 10.4.3.2.1, a shall be provided where the underground piping enters the trench. Thrust Blocks - โโโ ANSWER shall be concrete of a mix not leaner than one part cement, two and one-half parts sand, and five parts stone.
- 1/2 in. x 2 in. for 4" to 6" pipe
- 5/8 in. x 2 1/2 in. for 8" to 10" pipe
- 5/8 in. x 3 in. for 12" Pipe - โโโ ANSWER Restraint clamps for private fire service mains shall have the following dimensions: 5/8 in. in diameter - โโโ ANSWER Rods shall not be less than 5/8 in. for pipe sizes 4", 6", and 8" 3/4 in. for 10" pipe 7/8 in. for 12" pipe - โโโ ANSWER Clamp bolts shall have the following diamters: 5/8 in x 3 in. for 4", 6", 8", and 10" pipe 3/4 in. x 3 1/2 in. for 12" pipe - โโโ ANSWER Cast iron washers shall have the following dimensions: 1/2 in. x 3 in. for 4", 6", 8", and 10" pipe 1/2 in. x 3 1/2 in. for 12" pipe - โโโ ANSWER Steel washers shall have the following dimensions: 5/8 in. thick and 2 1/2 in. wide for 4", 6", 8", and 10"
5/8 in. thick and 3 in. wide for 12" pipe - โโโ ANSWER Restraint straps for tees shall have the following dimensions: 1/16 in. larger - โโโ ANSWER The diamter of rod holes shall be than that of rods Bell ends - โโโ ANSWER shall be installed facing uphill restrained - โโโ ANSWER Pipe shall be at the bottom of a hill and at any turns (lateral or vertical). flushed - โโโ ANSWER UG piping, from the water supply to the system riser, and lead-in connections to the system riser, including all hydrants, shall be completely before the connection is made to downstream fire protection system piping. Suction piping - โโโ ANSWER supplying fire pumps shall be flushed prior to connecting to the fire pumps based on the requirements of NFPA 20 200 psi or 50 psi, +/- 5 psi - โโโ ANSWER All piping and attached appurtenances subjected to system working pressure shall be hydrostatically tested at gauge pressure of in excess of the system working pressure, whichever is greater and shall maintain that pressure at gauge pressure of for 2 hours 1.) A gauge located at one of the hydrant outlets 2.) A gauge located at the lowest point where no hydrants are provided - โโโ ANSWER The test pressure shall be read from one of the following, located at the lowest elevation of the system or the portion of the system being tested: forward flow - โโโ ANSWER The backflow prevention assembly shall be tested automatic sprinkler system - โโโ ANSWER Aboveground piping shall be permitted to be located in hazardous areas protected by an
fire department connections - โโโ ANSWER Remote shall be located adjacent to a street or an access route to permit the fire department apparatus accessibility, or at a location approved by the AHJ. 1.) The sign shall have a raised or engraved letters at least 1 in. (25 mm) in height on a plate or fitting. 2.) The sign shall indicate the type of system for which the connection is intended.
- โโโ ANSWER Each Remote fire department connection shall be designated by a sign as follows: 150 psi (10.3 bar) - โโโ ANSWER Where the system demand pressure exceeds , a sign located at the fire department connection shall indicated the required inlet pressure. indicating valves, roadway box, municipal water supply - โโโ ANSWER All valves controlling connections to water supplies and to supply pipes to water-based fire protection systems shall be listed except for when installed in a when acceptable to the AHJ and a new connection to a The Standard shall cover the minimum requirements for the installation of private service mains and their appurtenances, which include the following - โโโ ANSWER - Automatic Sprinkler Systems
- Open Sprinkler Systems
- Water Spray Fixed Systems
- Foam Systems
- Private Hydrants
- Monitor Nozzles or Standpipe Systems with reference to water supplies
- Hose Houses The standard shall apply to combined service mains intended to carry water for fire service and other uses - โโโ ANSWER This standard shall NOT apply to the following situations - โโโ ANSWER - Mains
under the control of a water utility
- Mains providing fire protection and/or domestic water that are privately owned but are operated as a water utility The standard shall NOT apply to underground fire mains serving sprinkler systems designed and installed in accordance with NFPA 13R that are less than 4 in in nomimal diameter - โโโ ANSWER The standard shall not apply to underground mains serving sprinkler systems designed and installed in accordance with NFPA 13D - โโโ ANSWER The Purpose of this standard shall be to provide a reasonable degree of protection for life and property from fire through installation requirements for
