Minnesota Journeyman Sprinkler Fitter Practice Exam

These questions are part of the practice quiz. Start practicing

• What is the required tamped backfill under and around the pipe in trenches cut through rock?
• What is the maximum volume of antifreeze allowed in NFPA 13D and NFPA 13R?
• At what intervals must a dry system be full-flow trip tested?
• In which type of sprinkler system does the detection system play a crucial role before water release?
• What is the minimum operating pressure of an in-rack sprinkler head?
• What is the maximum length between hangers for vertical piping installations?
• How should automatic drains in fire pump installations be designed?
• What is the maximum distance a standpipe can be situated from a hydrant?
• In dry pipe systems, branch lines must be pitched at least how many inches per 10 ft?
• How much weight should a hanger be able to support in a sprinkler system?
• If dry system piping is located in the attic, and the attic is not heated, what is the only type of pendant sprinkler that can be utilized on the system?
• How often should diesel fire pumps be run for testing?
• What defines a manual standpipe system?
• The automatic relief valve for fire pumps with a rated capacity not exceeding how many gpm must have a nominal size of 3/4 inch?
• In refrigerated spaces maintained below 5° Fahrenheit, how long is the air pressure allowed to be restored after a system activation?
• How long must pipe and fittings be cured before installation of sprinkler heads to prevent damage?
• What is the minimum pipe size required to feed 1½" hose lines for horizontal runs up to 20'?
• What is the maximum distance allowed from the last hanger to the end of a 1" branch line?
• What is the maximum allowed time for a compressor to fill up a dry system to its required pressure?
• What is the Minnesota state fire protection code?
• In the context of fire protection systems, what does NFPA stand for?
• When tightening the arms of sprinkler heads, in which direction should they be aligned?
• What is the primary purpose of a Fire Department Connection (FDC)?
• Which NFPA standard relates to the installation of standpipes and hose systems?
• After passing the initial testing, when should dry-type sprinklers next be tested?
• Sprinkler heads that are color-coded purple indicate what temperature rating?
• What is the minimum operating pressure for a sprinkler head?
• What should the nominal size of an automatic relief valve be for pumps with a capacity of 3000 gpm to 5000 gpm?
• According to NFPA 13, how many residential heads should be calculated?
• Dry systems are designed to not exceed what temperature for circulating water?
• Two acceptable ways to cover sprinklers in paint booths or other areas where sprinklers are subject to be coated in a substance are cellophane bags and ______.
• In dry pipe systems, how should branch lines be pitched in nonrefrigerated spaces?
• When are return bends typically used in plumbing systems?
• What is the fine for working in Minnesota without a Minnesota journeyman's license?
• What is the maximum spacing of hangers on 1 1/2" or larger thin-wall pipe?
• If a gauge is recalibrated, at what percentage deviation does it fail and must be replaced?
• What is the maximum spacing of hangers for 1 1/2" or larger sch. 40 pipe?
• What size of auxiliary drain is required for trapped water over 50 gallons?
• What is the required setting for an automatic relief valve installed with a fire pump?
• What type of pipe is not acceptable for a standpipe?
• Which NFPA standard covers the installation of sprinkler systems in low-rise residential occupancies?
• What is the recommended maximum distance for spacing between standard spray sprinklers in light hazard areas?
• What is the temperature rating range for intermediate sprinkler heads?
• Which organization sets the standards for fire sprinkler systems?
• Service personnel must be qualified to inspect, test, and maintain what type of systems?
• What is the minimum size of FDC piping that requires two inlets according to regulations?
• What is the maximum hanger spacing for copper tube pipe sized ¾" to 1"?
• What is the minimum operating pressure for sprinklers serving a storage area with commodities?
• A wet system with a trapped section of pipe that exceeds 50 gallons of water shall have a minimum of what size valve and plug?
• Standard response sprinklers must be replaced or tested after how many years of service?
• What is the minimum height above grade for a fire hydrant?
• What is the maximum length of nipple rising from the tee to supply pendant heads below in a new suspended ceiling?
• Standard response sprinklers must be replaced after how many years of service?
• What is the maximum number of sprinklers that can be installed on any one pre-action system?
• How far away should outdoor fire pump units be located from any buildings and other fire exposures?
• What is the maximum distance a sprinkler head shall be down from the deck in an unobstructed construction building?
• How many feet should there be between a standpipe and five hydrant FDC?
• What type of hazard is associated with areas where flammable liquids are stored?
• What is the requirement for the installation of sprinkler heads in trash chutes according to fire safety standards?
• What is the maximum length of hose allowed in hose stations?
• FDC connections shall be located between which of the following heights above finished ground?
• How critical is the air supply restoration time for a functioning dry sprinkler system?
• Where does a Fire Department Connection (FDC) need to be located?
• Quick Response sprinklers in a building are due for testing. The building contains 800 concealed sprinklers, 300 upright sprinklers, and 200 pendant sprinklers, how many sprinklers need to be sent off for testing?
• According to NFPA 25, dry-type sprinklers must be tested after an initial period of how many years of service?
• The circulation relief valve on a fire pump should be installed on which side of the pump?
• What is the minimum valve size required for auxiliary drains on wet systems in freezing temperatures?
• What width must Horizontal sidewall sprinklers be installed at above and below a soffit?
• In a fire pump system, which type of pipe is acceptable for the pressure sensing lines?
• For what purpose is the 3/32" hole in the clapper of the check valve?
• After a dry system has been in service for 3 years, what is required for an air test?
• What is the maximum length a flex drop can be before it needs support?
• How often should seismic bracing and pipe hangers be inspected from floor level?
• What does the term "feed main" refer to in a sprinkler system?
• What is the minimum pipe size required for a sensing line?
• Before water enters a preaction system, which must happen?
• Why is a check valve with a 3/32" hole in the clapper required in freezer spaces?
• What is the minimum distance between residential sprinkler heads?
• Sprinklers in a rack shall discharge not less than how many psi for all classes of commodities?
• What size common drain pipe must be installed in a stairwell if the system drains are 1 1/2"?
• Fire pumps must have an automatic relief valve set below which of the following pressures at minimum expected suction pressure?
• For Ordinary Hazard Group 1 sprinkler heads, what is the typical maximum coverage area allowed?
• What is the replacement or testing interval for quick response sprinklers?
• What is the largest pipe size that can be hung from a toggle hanger?
• What is the inspection interval for the interior of steel water storage tanks with corrosion protection?
• Which standard do post indicator valves need to comply with regarding height above the grade?
• What is the minimum pipe size required for Class I and III standpipes?
• What is NOT a typical installation requirement for backflow preventers according to standard practice?
• What method is NOT allowed for supervising open valves on a backflow prevention device?
• What is the minimum distance required for a lintel to be considered a compartment?
• For multiple adjacent trapped branch pipes in dry systems, tie-in drains should be pitched how many inches per 10 feet?
• What is an acceptable alternative to using a valve and nipple configuration for auxiliary drainage on dry systems?
• How often should the interior of steel tanks with no corrosion protection be inspected?
• How much clearance is required around pipes in a pump house when they pass through walls?
• What is a key component that should be checked during a monthly churn test?
• What is the notable characteristic of a left-handed fire pump?
• What is the required pitch for dry systems?
• What is the purpose of a branch line in a sprinkler system?
• Where must sensing lines for the fire pump and jockey pump tie into the system?
• Which device may be used to meet water delivery requirements to the inspection test valve?
• How frequently must antifreeze systems be tested to ensure freeze point protection?
• What pressure and flow are 1½" hose stations designed for?
• If dry system piping is located in a non-heated attic, what type of sprinkler can be utilized?
• What is the standard procedure for performing a hydrostatic test?
• The interval for testing water storage tank level indicators is?
• For light hazard areas, what is the regulation regarding the number of heads on a branch line?
• How often should sprinkler heads in commercial cooking equipment and ventilation systems be replaced?
• What is NOT considered when determining the distance between hangers for piping?
• Which component generally supplies the entire sprinkler piping network initially?
• Which of the following areas does not require sprinklers according to NFPA 13R?
• At what minimum height should controllers for fire pumps be mounted above the floor?
• Which type of pipe is not permitted for use under NFPA 13D?
• What is the minimum amount of time to close a valve as per regulations?
• Which material is NOT typically used as a freezing protection for CPVC pipes?
• What is the maximum time for initial water discharge from the system test connection in a dry system?
• If an airline feeding a dry or pre-action system runs through the freezer, how long must the removable piece of 1" pipe be for inspection?
• When adding a new sprinkler system in an existing building, what is one consideration for head placement?
• What is the maximum allowable spacing between sprinkler heads in a standard occupancy?
• Where are riser clamps on standpipes required in multistory buildings?
• At what intervals should the interior of steel tanks with no corrosion protection be inspected?
• What is the hanger spacing for threadable lightwall steel pipe sized 1" to 3"?
• With standard spray sprinklers, obstructions to discharge over how many feet wide require sprinklers to be installed under the obstruction?
• What is the recommended inspection interval for dry system air pressure?
• In hotels and motels, under what conditions does NFPA 13 not require heads in closets?
• In refrigerated spaces maintained below 5 degrees, the air pressure must be restored within how many minutes?
• What is the minimum square footage of an ESFR head placement?
• What is the ratio of water to air required in a dry pipe valve?
• If the minimum pump suction pressure is below what psi, a compound pressure and vacuum gauge must be used?
• At what intervals should an obstruction investigation be performed where piping passes from warm areas into cold areas in pre-action systems?
• How many pipe diameters must check valves and backflow prevention devices be located from the pump suction flange?
• What is the purpose of installing goosenecks for dry pendant sprinklers?
• In a plastic system, what is the minimum allowable pipe size?
• What is the coverage area for ESFR sprinkler heads?
• What is the maximum distance that the Fire Department Connection (FDC) must be located after a check valve?
• What is the pressure requirement for class III standpipe systems?
• Which of the following is considered a key element in the design of a fire sprinkler system?
• What is the maximum distance that a pipe can extend from its last support in a sprinkler system?
• At what pitch does a ceiling no longer qualify as sloped?
• How many heads must be on a system before supervision is required?
• If a sample size of 50-year standard response sprinklers is sent off for testing and passed in 2020, what year would they need to be tested again?
• What is the maximum unsupported length of an arm over if the system pressure exceeds 100 psi?
• What is a transfer main that is supplied by the riser or cross main called?
• What is the hanger spacing for 1½" to 8" steel pipe?
• Dry system main piping shall be pitched at ______ per 10 feet.
• What is the maximum distance allowed between sprinkler heads that are located 12'6" apart along a branch line?
• According to NFPA 13, how should branch lines be pitched?
• What is the specified maximum coverage area for Extra Hazard sprinkler heads?
• What is the acceptable temperature classification for sprinkler heads installed near heat ducts?
• How does NFPA define "extra hazard" in storage applications?
• According to NFPA 72, what is the maximum time water can flow before the flow switch goes into alarm?
• What is the maximum distance allowed between 1½" hose stations?
• A minimum of how many inches shall be maintained between the sprinkler deflector and the top of a tier of storage?
• In a deluge system, how are the sprinkler heads activated?
• What is the maximum distance allowed from the end of a 1 1/2 inch branch line or larger to the last hanger?
• What sprinkler head spacing rule applies to discrepancies in vertical ceiling heights?
• Where should the main relief valve in a fire pump installation be located?
• Standpipe hose valves must be located horizontally, a minimum of 3 feet, and a maximum of ______ feet off the finished floor.
• Where should the Fire Department Connection (FDC) be located in a single zone dry system?
• What type of system should CPVC pipe and fittings be protected against freezing with?
• When looking at a fire pump motor, if the suction side is on the left, what type of pump is it?
• What should be the minimum diameter of a fire pump pressure gauge?
• What is the maximum spacing between hangers on 1 1/2" thin wall pipe?
• What is the main drain size for risers up to 2 inches in size?
• What is the term for the main supply line installed parallel to the building's roof structure?
• When bonding and grounding electrical components to a fire sprinkler system, which practice is not allowed?
• Which of the following is the primary function of a backflow preventer?
• How many hours of experience are required for the MN Test?
• What should the system air pressure be maintained at in relation to the calculated trip pressure of the dry pipe valve?
• When storing tread tires, what is the maximum height allowed in feet?
• In what scenario do you require intermediate or high temperature sprinkler heads?
• Are Fire Department Connections (FDCs) required for NFPA 13R systems?
• What is typically required during testing of a fire sprinkler system?
• What is the minimum height above grade that a Fire Department Connection (FDC) shall be placed?
• How often must lateral sway bracing be installed for feed and cross mains?
• Within how many feet of the pump suction flange can a control valve be installed in the suction pipe?
• What is the maximum unsupported length of any arm over in a system under 100 psi?
• What is the name of the plate at the bottom of a tank that stabilizes the stream when a pump is receiving suction supply?
• Sprinklers shall be inspected from the floor level for corrosion, damage, or other infractions at what intervals per NFPA 25?
• What is the minimum pipe size for standpipes that are part of a combined system for completely sprinkled buildings?
• What color bulb is required for a head in a heater zone within a 7 ft circle?
• What type of sprinkler system is associated with storage hazards?
• Post indicator valves should be located at least how many feet away from a building?
• What is a common feature of unions used in fire pump sensing lines?
• Skylights under how many square feet are not required to have sprinklers installed?
• Why is an eccentric reducer utilized on the suction side of the pump?
• What is the required height for a hose valve location above the floor?
• When it comes to bonding and grounding electrical components to a fire sprinkler system, what is not allowed on a fire sprinkler system?
• What type and size of piping should sensing lines for fire pumps consist of?
• What is the maximum capacity for a dry system?
• If a sample size of quick response sprinklers were sent off for testing and passed in 2020, what year would they be due for testing again?
• What is the maximum allowable air leakage for dry systems per week?
• What is the hanger spacing for 1" and 1¼" steel pipe?
• What is the minimum diameter size required for the bypass around the check valve?
• How long does it typically take for a compressor to fill a dry system?
• Fire Protection Gauges shall be replaced or recalibrated at what intervals?
• What is the inspection frequency for kitchen hoods?
• In a suction reservoir, where should a drain pipe discharge to prevent air from being drafted by the pump?
• The minimum excess pressure for a relief valve in a dry system should be set at what psi?
• What is the maximum length a sprinkler label is allowed on our sprinkler pipe?
• A sprinkler with red liquid in the bulb would discharge at what temperature?
• How often should mainline strainers be inspected?
• What pressures and flows are class II standpipe systems designed for?
• What size of auxiliary drain is required for trapped water between 5 and 50 gallons?
• Sprinkler piping must be substantially supported from the building structure. What weight must this structure support for water-filled pipe?
• What is the maximum distance allowed from the end of a 1 1/4 inch copper line to the last hanger?
• Which side of the fire pump discharge should the bypass be located?
• What is the regular operation time for electric fire pumps during testing?
• Dry-type pendant sprinklers on a dry sprinkler system do not need to be installed on goosenecks. True or False?
• Which NFPA standard is focused on sprinkler systems in one- and two-family dwellings?
• The air supply on a dry system in a non-refrigerated space must restore normal air pressure within how many minutes?
• In which section of an installation should a check valve be installed?
• Should pump rooms be lighted and heated?
• According to NFPA standards, which type of fire pump assembly is not accepted?
• What information must be indicated at the dry pipe or preaction valve regarding low point drains?
• What is the typical maximum coverage area for Storage heads?
• Class III and class I standpipe systems are designed for what pressures and flows?
• How many heads are required before a Fire Department Connection (FDC) is necessary?
• Who should pre-plan the location and access to a fire pump room?
• Which types of sprinkler heads can be utilized on dry systems?
• What is the purpose of installing goosenecks on standard pendant sprinklers?
• What is the minimum size of discharge for a tank used in sprinkler systems?
• What type of system should utilize pressure relief valves?
• On wet systems, if a trapped section of pipe holds less than how many gallons, the auxiliary drain must consist of a valve not smaller than 1/2 inch?
• Which component indicates the pressure near the discharge casting of a fire pump?
• According to NFPA 13, what is the maximum time water can flow without tripping the flow switch?
• Protective straps on sprinkler heads may be removed if they are at least how many feet off the floor?
• What does the light hazard small room rule require in terms of space?
• What is the approval condition for installing heads in closets according to NFPA 13?
• A relief valve on a dry system located between the compressor and control valve shall be set at how many psi in excess of maximum air pressure in the system?
• What is the required hanger spacing for a 2" copper pipe?
• How often must standpipe valves be inspected?
• In light hazard occupancies, how long can the room be before additional sprinklers need to be added, if horizontal sidewall sprinklers are across from each other?
• What is the frequency for checking standpipe components?
• Which type of valve is specifically used for controlling the direction of water flow in a fire protection system?
• What is the maximum length between hangers for 1 inch sch 40 pipe?
• What is the maximum time for initial water discharge from the test connection on a dry system?
• All fire hydrants should be tested for a minimum of how long to ensure all foreign materials have cleared?
• What is the minimum distance a standard sprinkler head can be to another sprinkler head?
• How far apart should hangers be placed for a 1¼" diameter pipe?
• How far apart can residential sprinkler heads be spaced at maximum?
• When should the interior of steel water storage tanks be examined if they do not have corrosion protection?
• What is the required pitch for dry system branch lines per NFPA 13?
• What is the minimum size pipe that can connect a dry system to the air compressor?
• What is the testing interval for dry-type sprinklers after they have been in service for 50 years and passed their previous test?
• What is the requirement for sprinkler heads in trash chutes?
• In sprinkler systems, what is the common term for horizontal piping that may have sprinkler heads installed directly on it?
• What distance can a riser supported section span before requiring additional support?
• How often must standard response sprinklers be retested after their initial replacement?
• What is the maximum distance horizontally that heads can be out of center in attics?
• What is the inspection interval for water storage tanks with corrosion protection?
• Which NFPA standard provides guidance specifically for residential sprinkler system installations?
• What materials are acceptable for fire pump and jockey pump pressure sensing lines?
• What color bulb indicates high temperature ratings in a sprinkler system?
• If you have 3 dry systems in a building sharing an air compressor, how many air maintenance devices are required?
• What materials are typically left for the owner after job completion?
• What is the minimum psi a dry pipe valve is set to trip?
• Storage on shelves in closets and other storage arrangements must be maintained at ______ inches below the sprinkler deflector.
• When measuring the distance from a metal pan deck to the sprinkler, if the pan is 3 inches or larger, to where should the measurement be taken?
• Standard pendant sprinklers are allowed on dry systems, but they must be installed on goose necks. The piping must be installed in an area maintained at or above __ degrees.
• Which type of sprinkler operates best in locations with light hazard classifications?
• What is the maximum coverage area for Ordinary Hazard Group 2 sprinkler heads?
• Which NFPA standard outlines the Inspection, Testing, and Maintenance of Water-Base Fire Protection Systems?
• What is the minimum suction pressure required for fire pumps to avoid the need for a compound pressure and vacuum gauge?
• Which of the following sprinkler systems is most likely to be used in a residence?
• What is the maximum pressure of a 2½" hose valve on a standpipe system?
• What is the duration of water supply required for NFPA 13D systems?
• What acceptance tests are required for dry pipe systems?
• Which valve must be present between the air supply and the shutoff valve of the dry system?
• What is the primary purpose of ceiling pocket sprinklers?
• When isolated trap sections of system piping exceed 5 gallons, how many valves must be included in the auxiliary drain?
• When system pressure exceeds 100 psi, what is the maximum unsupported distance between the end sprinkler in the pendant position and the closest hanger?
• What is the minimum required height for fire Department Connection (FDC) connection points?
• What is a common indicator that a sprinkler is rated at 286°F?
• If the length of pipe between the test header and the discharge side of the pump exceeds a certain length, what is the minimum nominal pipe size that must be used?
• How far must a hanger be from a horizontal main after a riser?
• Ceiling pockets do not require sprinklers unless they are over 36" deep and over _____ square feet in size.
• At what width soffit must you install a sprinkler above and below a soffit when dealing with horizontal sidewall sprinklers in soffits?
• What is one purpose of a check valve in a sprinkler system?
• What is essential for fire pump operation regarding the minimum expected suction pressure?
• What is the primary function of a sprinkler system?
• In a fire pump setup, what is the significance of the 5% volume for sump?
• How should pressure sensing lines be positioned relative to the discharge isolation valve?
• What is the required main drain size for risers that are 4 inches and larger?
• On fire pump gauges, the dial must indicate pressure to at least twice the rated working pressure but not less than how many psi?
• What is the hanger spacing for 1" diameter pipe?
• What type of couplings should be attached to powder driven studs?
• What is the maximum percentage of rated capacity that a centrifugal fire pump should handle as a single demand for fire protection?
• What is the maximum operating pressure for extra hazard storage in a sprinkler system?
• What slope must tie-in drain lines maintain for every 10 feet of pipe length?
• If a sample of standard response sprinklers passed testing, when would they be tested again?
• In scheduled systems, what is the maximum number of 1" sprinkler heads that can be taken off?
• How many heads can be taken off a cold weather valve?
• Sensing lines for fire pumps and jockey pumps must be run separately, and must tie into the pump assembly between the discharge check valve and the ___________?
• Pendant and upright sprinklers for residential application shall be positioned so that the deflectors are within how many inches from the ceiling?
• What should the pump be installed with when the suction supply to a sprinkler system is sufficient without the pump?
• What pressure is typically associated with 1½" hose stations in a sprinkler system?
• What is the minimum size pipe you are allowed by code to use for a sensing line on a fire pump assembly to the controller?
• Which NFPA standard pertains to the installation of sprinkler systems?
• What is the maximum size of a dry system that can be permitted without a quick-opening device according to Minnesota regulations?
• What is the acceptable head orifice size range for sprinklers installed in kitchen hoods and vent ducts?
• What materials are acceptable for constructing sensing lines in fire pumps?
• Which type of system utilizes a dry pipe valve?
• What is the typical maximum coverage area for Extra Hazard sprinkler heads?
• How often should antifreeze system freeze point protection be tested?
• Who is responsible for verifying sprinkler systems are adequate for what is being stored in the building?
• What is the minimum discharge required for a single head design of a residential sprinkler?
• At what intervals should fire protection gauges be replaced or recalibrated?
• What type of sprinkler heads should be used for temperatures exceeding 100°F?
• What valve type must be installed in the discharge pipe of a jockey pump?
• How often should water storage tank level indicators be tested for accuracy?
• Who is responsible for verifying that sprinkler systems are adequate for what is being stored in a building?
• The air supply for a dry system must restore normal air pressure within how many minutes?
• For quick response sprinklers that passed testing, when is their next testing due?
• What is the minimum number of manual and automatic starts required during fire pump acceptance testing?
• How often should strainers be inspected under normal flow conditions?
• Sprinkler piping shall be substantially supported from the building structure which must be able to support?
• Fire pump pressure gauges with a dial less than how many inches in diameter require a nominal 1/4" gauge valve?
• Where should the circulation relief valve on a fire pump be installed?
• How often should air and water levels be checked on a pressure tank?
• What is the minimum pitch required for mains in dry pipe systems in non-refrigerated areas?
• What is the function of a riser nipple in a sprinkler system?
• What is the primary purpose of a jockey pump in a fire suppression system?
• What does NFPA 231C govern?
• What is the nominal orifice size drilled in unions with noncorrosive diaphragms allowed in place of check valves in sensing lines?
• What is the maximum allowable time for an air compressor to fill a dry sprinkler system?
• When are local waterflow alarms required?
• When should mainline strainers be internally inspected?
• Quick Response Sprinklers shall be replaced or sent off for testing at what intervals?
• An area of low temperature and low combustibility is considered which type of hazard?
• For a dry system, the maximum size allowed without a quick opening device is what capacity?
• What level of training should service personnel have for fire protection systems?
• What is the typical maximum duration for a hydrostatic test performed on a sprinkler system?
• What type of sprinkler head is required if it is located above a heat duct within a 7' radius?
• Which type of fire pump is dedicated for fire protection services?
• What is the required inspection frequency for Fire Department Connections (FDCs)?
• Maximum allowable time for air pressure restoration in a dry system is?
• What is required for air compressors to function properly in a dry sprinkler system?
• What distance change necessitates adjustments in the spacing of sprinkler heads due to vertical ceiling height changes?
• What is the maximum coverage area for Light Hazard sprinkler heads according to NFPA 13?
• What is the maximum height allowed for a sprinkler head location beneath a non-combustible ceiling?
• What is the maximum drop in a smooth flat ceiling before you have to consider it a wall for the purpose of sprinkler layout?
• What is the flow rate of a master stream?
• A pump room and valve enclosure must maintain what minimum temperature to avoid freezing?
• What is the maximum square footage of a standard spray sprinkler in an ordinary hazard occupancy?
• How many standard head types are typically present in a sprinkler system?
• The minimum allowable air pressure for a dry fire protection system is?
• A sprinkler with blue liquid in the bulb would discharge at what temperature?
• All fire hydrants shall be opened fully and flowed until all foreign material has cleared or for a minimum of 1 minute at what intervals?
• At what intervals should water storage tank level indicators be tested for accuracy?
• What type of system operates effectively with or without air pressure?
• What is the required clearance for materials stored beneath a sprinkler deflector in a storage area?
• Which component could potentially introduce issues if proper bonding and grounding practices are not adhered to?
• When installing an antifreeze system, the solutions shall conform to whom?
• What is the maximum distance allowed from the end of a 1 1/2 inch line to the last hanger?
• What is the minimum temperature required for standard pendant sprinklers to be used on dry systems?
• What size pipe is required for a pipe stand that will support 10" pipe?
• What is the minimum curing time required after solvent welding CPVC pipe and fittings, including sprinkler head adapters, before installing sprinkler heads?
• What temperature rating is required for sprinklers located under skylights?
• What is the required pressure at the top of the standpipe?
• What is the maximum water temperature that can flow through the sprinkler portion of the system?
• How much pressure should an approved relief valve be set to relieve above system air pressure?
• What is the unsupported length on the end of branch lines from the last hanger location for 1¼" pipe?
• For a properly functioning fire pump system, what is a common size for the relief valve on larger pumps?
• How does the air pressure in a dry pipe system typically compare to the system's water pressure?
• What is the minimum diameter of a trip test connection or manifold pipe required?
• What must fire pumps be approved for?
• What is the maximum time allowed for water to reach the inspector's test on a dry pipe system?
• What is the maximum allowable height for sprinkler heads in high ceilings according to standard regulations?
• What is NFPA 13R primarily used for?
• What is the minimum spacing required between an upright sprinkler head and a hanger rod?
• In what situation can the 30-minute rule for air pressure restoration be waived?
• For horizontal piping extending more than 18 inches, what is required?
• How often should dry systems be checked for air leakage?
• Standard horizontal sidewall sprinklers shall be located ______ to 6 inches below the deck.
• According to the Minnesota State Fire Code, how often should dry systems be checked for air leakage?
• Trapped water less than 5 gallons requires what size auxiliary drain?
• How long is the minimum run time for a diesel fire pump during testing?
• What is the required pressure rating for underground components in sprinkler systems?
• What is the maximum size of a pipe that can be hung with toggle bolts in sheetrock?
• A pressure tank for a sprinkler system should be at least how full?
• Which part of a sprinkler system is considered the most remote?
• What is the maximum number of heads you can calculate on an NFPA 13R type system?
• What is the hanger spacing for CPVC pipe 1" in diameter?
• What is the maximum number of heads allowed on branch lines on either side of a cross main in a light hazard area?
• Riser clamps are primarily used to provide support for what component in a building's fire protection system?
• What is the required size of the automatic relief valve for a pump of 2500 gpm or smaller?
• What type of sprinkler heads are required if the water temperature exceeds 100°F?
• What does NFPA 20 govern in terms of fire protection?
• There are three types of fire pump drivers acceptable to NFPA 25 and NFPA 13, which is not an acceptable fire pump driver?
• What is the minimum distance a backflow preventer with butterfly control valves must be installed from the pump suction flange?
• What is the maximum distance allowed from the end of a 1" copper line to the last hanger?
• What is the focus of NFPA 14?
• At what intervals shall anti-freeze systems be tested for the level of freeze protection?
• What is the required minimum connection size for a system pressure gauge in sprinkler systems?
• How many gallons per minute must a fire pump flow to be considered adequate?
• What diameter should a trip test connection or manifold pipe have at minimum?
• An approved relief valve on a dry system must relieve pressure at least how many psi above the system air pressure?
• What is required to be indicated on a sign at the dry pipe or pre-action valve regarding low point drains?
• Tread tire storage piles, regardless of storage method, shall not exceed how many feet in the direction of wheel holes?
• How frequently must mainline strainers be inspected after any flow condition occurs, including 2" main drain testing?
• At what temperature is piping for a dry sprinkler system required to be maintained?
• How many gallons does a dry system typically max out at?
• Where must riser clamps be placed in relation to offsets in the standpipe?
• How frequently should the dry system's full flow trip be tested?
• What is the maximum horizontal spacing for in-rack sprinklers?
• What should tie-in drains be used for when installing dry systems?
• What is the purpose of the contractor's certificate?
• If you see a solder link sprinkler with blue paint on the frame arms from the factory, what temperature is this sprinkler?
• The pressure sensing line connection for each pump must be made where in relation to the pump's discharge check valve?
• What is the minimum clearance between storage and the deflector of large drop sprinkler heads?
• What type of sprinklers are required in a skylight?
• What is the accepted maximum length for copper lines before requiring a hanger?
• According to NFPA 25, sprinklers should be inspected for corrosion and damage at what intervals?
• What is the minimum acceptable capacity for a centrifugal fire pump in relation to the connected fire protection system?
• What is the minimum pipe size that can connect the dry system to the air compressor?
• What is the minimum size pipe allowed for a sensing line on a fire pump to the controller?
• What is the required pitch for dry system main piping per NFPA 13?
• At what height should post indicator valves be set above the final grade?
• If a sample size of dry-type sprinklers were sent off for testing and passed in 2020, what year would they need to be sent off for testing again?
• What is the maximum size pipe that can be supported by drilling holes in the metal pan ceiling?
• When piping passes through warm areas into cold areas on a pre-action system, an obstruction investigation needs to be performed at what intervals?
• What type of tank requires inspection annually, regardless of corrosion protection?
• According to the spare sprinkler head schedule, how many spare heads are needed for a system with 1000 or more heads?
• What is the maximum time allowed for water flow alarms to sound?
• How far apart must hangers be placed on horizontal piping from a standpipe to a hose valve?
• How many sprinklers must be sent off for testing if a sample size of quick response sprinklers fails the initial testing and are over 20 years old?
• In Minnesota, how often is the seismic bracing and pipe hangers required to be inspected?
• Which type of hazard classification would a restaurant likely fall under for fire sprinkler design?
• What is the NFPA standard for Water Tanks for Private Fire Protection?
• How many hours is a bypass around a check valve on a tank required to fill the tank?
• Which temperature heads should be used for light, ordinary, and extra hazards?
• For which size of CPVC pipe is the recommended hanger spacing 6' 6"?
• A listed device allowed to meet water delivery requirements to the inspector's test connection on a dry system is?
• In designing a bathroom with a fire sprinkler system, what is the required square footage to be covered?
• According to NFPA standards, what is the type of fire pump you generally cannot use?
• Ceiling fans over ______ inches in diameter are required to be considered as an obstruction.
• If a building has a blend of different types of sprinklers including both dry-type and quick response, which type's intervals for testing would generally be shorter?
• What is the main drain size required for risers measuring 2½ inches to 3½ inches?
• How many pipe diameters away from the pump suction flange must check valves be located in the suction pipe?
• What is the smallest orifice size for a head in a rack storage system?
• What is the minimum size pipe allowed in a dwelling unit for sprinkler systems using steel pipe?
• If recalibrating a sprinkler system gauge rather than replacing it, at what percentage off must the gauge be replaced?
• When the suction pipe and pump suction flange are not the same size, what should be used to connect them to avoid air pockets?
• Which NFPA Standard covers standpipes?
• What bulb colors correspond to ordinary temperature ratings for sprinkler systems?
• What type of guards must be used to protect sprinklers subject to mechanical injury?
• What is the required distance between the flanges of the pump suction intake and the elbow and tee for suction requirements to apply?
• What percentage of portable fire extinguishers can be removed if 1½ inch hose lines are capable of reaching all parts of the building?
• What is an acceptable alternative to cellophane bags for covering sprinklers in paint booths?
• What is the permissible distance for head placement from the ceiling in residential applications?
• What is the inspection frequency for kitchen hoods as per regular guidelines?
• If standing behind a fire pump motor and looking toward the fire pump, the suction side of the pump is on the left, what is this pump?
• What is the maximum number of 2" sprinkler heads that can be taken off in scheduled systems?
• What is the maximum water temperature that can flow through the sprinkler portion of the system?
• What is the required size of the drain for a 2½ inch standpipe?
• What is the lag screw size used for a 6" pipe?
• What interval is required for the inspection of the interior of steel tanks with corrosion protection?
• Under what condition should sidewall sprinklers not be used?
• What is the maximum sprinkler spacing for an extra hazard system with a density greater than or equal to .25?
• Which option is a requirement for bonding on a fire sprinkler system?
• What pipe size is required for 1¼" hoses for runs between 20' to 80'?
• What is the maximum square footage that a standard spray sprinkler can be spaced in a light hazard occupancy?
• What is the primary benefit of using a sprinkler system in a building?
• Where do calculations for a sprinkler system typically start?
• How often must dry system branch lines be inspected for leaks according to regulations?
• What is the nominal size of the automatic relief valve on a fire pump with a rated capacity not exceeding 2500 gpm?
• What is the required maximum drop in a smooth flat ceiling before it is considered a wall for sprinkler layout?
• Standard response sprinklers shall be replaced or sent off for testing at what intervals?
• What size rod is needed for hanging 10 inch and 12 inch pipe?
• Which code universally addresses fire protection?
• What is the maximum length of pipe allowed before a larger nominal pipe size must be used in a test header connection?
• What is the maximum distance between hangers for 1" schedule 40 pipe?
• What type of piping is supplied by the riser nipple from the cross main?
• What is the maximum allowable distance between the ceiling and the deflector of a sprinkler below a non-combustible ceiling?
• What piping component is known for supplying a vertical line for sprinkler lines?
• What is the maximum ceiling temperature for intermediate sprinkler heads?
• Is a Fire Department Connection (FDC) required for an NFPA 13D type system?
• What is the minimum system pressure rating for aboveground components in sprinkler systems?
• When should extra heavy pattern fittings be used?
• How often should the interior of a pressure tank be inspected?
• When can sprinklers be installed with a closed valve?
• What is the maximum distance allowed from the last hanger to the end of a 1 1/4-inch line?
• If an obstruction is wider than 4 ft requiring sprinklers to be installed under it, what is the acceptable distance for adding sprinklers next to the obstruction?
• Where should the pressure sensing line connection for each pump be located in relation to the discharge check valves?
• For FDC piping of 3 inches or smaller, how many inlets are required?
• What is the purpose of a sprinkler system drain valve?
• What type of sprinkler is specifically designed for dry systems in untreated attics?
• What is the maximum vertical distance above the pipe required for pipe backfill?
• How many gauges are required on a dry pipe system?
• What is the largest pipe size that can have a threaded union installed on it?
• For a wet system with a trapped section of pipe that exceeds 50 gallons of water, what is the minimum size valve and plug that can be used?
• When inspecting a building with quick response sprinklers over 20 years old, how many sprinklers need to be sent off for testing if there are 800 concealed, 300 upright, and 200 pendant sprinklers?
• What is the minimum size of a common drain for sprinkler systems with floor control valves that have 1 1/2" drains?
• Fire Department Connections are required to be a minimum of 18 inches and a maximum of _____ inches off the finished grade.
• What is the minimum distance a sprinkler head can be from the wall?
• The distance required from a backflow preventer to the pump suction flange typically ensures what?
• What material is commonly used for sprinkler system piping?
• Who is credited with inventing pipe calculations?
• How often does an electric fire pump need to be operated at rated speed?
• What is the maximum length a branch line starter piece can be without a hanger?
• How often are standpipes typically flowed for maintenance checks?
• True or False? Powder driven studs or welded studs must have a coupling to attach to the rods.
• Gauge dials on fire pumps should indicate pressure up to at least twice the rated working pressure of the pump, but not less than what psi?
• Do dry type pendant sprinklers need to be installed on goosenecks in a dry sprinkler system?
• What type of valve should be located at a low point between the drain valve and the header in the pipeline?
• What nominal size should the fittings of the pressure sensing lines be?
• How far off the bottom must an anti-vortex plate be installed at a minimum?
• What spacing requirement exists for sprinklers in light hazard classifications?
• What is the maximum size pipe that a lag screw rod can support?
• How long should the water supply be capable of supplying all exposure sprinklers during a fire?
• What is the minimum amount of time that a control valve can be closed?
• What color are the frame arms on extra high temperature sprinkler heads?
• Standpipes shall be supported at which of the following points?
• What is the maximum distance vertically from the peak that sprinkler heads can be positioned in attics?
• What temperature does a solder link sprinkler with blue paint signify?
• A fire pump must be dedicated to what type of service?
• For encapsulated storage, what is the maximum horizontal spacing for sprinklers?
• At what distance should sidewall sprinkler head deflectors be located from the finished ceiling?
• What is required to prevent accidental activation of a dry pipe valve?
• What is the purpose of allowing extra time for air pressure restoration in extreme cold?
• What is the maximum distance allowed from the end of a 1 1/2 inch or larger copper line to the last hanger?
• How frequently does a dry system need a full-flow trip test?
• What type of maintenance is crucial for fire sprinkler systems?
• What is the maximum distance allowed from the end of a regular branch line to the last hanger for a pipe larger than 1"?
• Dry system branch lines shall be pitched at ______ per 10 feet.
• When passing through walls, ceilings, or floors of the fire pump room enclosure, the hole for the pipe must be nominally larger than the pipe by what diameter?
• What is the maximum distance between supports of risers in a sprinkler system?
• How many spare sprinkler heads are required for systems with 300 to 999 heads?
• In light hazard areas, how many heads are allowed off 1½" pipe?
• What is the minimum air pressure required for a pressure tank?
• What nominal size should the fittings for fire pump and jockey pump pressure sensing lines be?
• Fuel tanks for fire pumps should have a capacity equal to what formula?
• What is the recommended auxiliary drain size for water trapped greater than 50 gallons?
• The required air pressure in a dry system should always be monitored for compliance above which pressure?
• What is the maximum distance from a hydrant that a FDC can be located?
• Dry-type sprinklers shall be replaced or sent off for testing at what intervals?
• What is the minimum clearance between deflector and storage for a standard sprinkler head?
• What must be considered if the ceiling drop exceeds 36 inches during sprinkler layout planning?
• When does the license for a journeyman expire each year?
• For a water storage tank, the distance between the floor and any part of the tank shall be at least how many feet?
• What must not exceed 150% of the centrifugal fire pump's rated capacity?
• What is the density maximum for an extra hazard system classified as having a density less than .25?
• How often should private fire hydrants be inspected?
• On a dry pipe valve with a 5 to 1 ratio and system psi of 75, what pressure will the valve trip at?
• What is the maximum size system allowed with a single FDC outlet?