Per NFPA 13 (2019), which occupancy hazard classification applies to typical offices, churches, educational classrooms, and hospital patient rooms?
Fire Sprinkler Systems
Question · Easy
What is the defining feature of a wet-pipe sprinkler system under NFPA 13?
Where piping cannot be reliably kept above freezing, which automatic sprinkler system type is the usual NFPA 13 choice?
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Which formula gives sprinkler discharge in the NFPA 13 hydraulic method?
What is the nominal K-factor of a standard 1/2-inch orifice spray sprinkler?
Unless a listed exception applies, new aboveground sprinkler piping is hydrostatically tested at which acceptance pressure and duration?
What is the ordinary temperature classification range for automatic sprinklers?
For standard spray sprinklers in Light Hazard occupancies, what is the maximum protection area per sprinkler under NFPA 13?
What is the minimum residual operating pressure at a standard spray sprinkler unless the listing requires a higher value?
How must a pendent spray sprinkler be oriented?
A local waterflow alarm is required on a sprinkler system that has more than how many sprinklers?
What combined inside-and-outside hose stream allowance does NFPA 13 assign to Light Hazard occupancies?
Using the NFPA 13 (2019) density/area starting point, Ordinary Hazard Group 1 is designed at which density over 1,500 ft²?
Question · Medium
A mercantile sales floor with a moderate-to-high quantity of combustibles is most often designed as which NFPA 13 occupancy?
A Light Hazard wet system is calculated at 0.10 gpm/ft² over 1,500 ft². What is the sprinkler demand for that remote area before hose stream is added?
An Ordinary Hazard Group 2 occupancy is designed at 0.20 gpm/ft² over 1,500 ft². What is the remote-area sprinkler demand before hose stream?
A K-5.6 sprinkler operates at 16 psi residual at the orifice. What is the discharge?
A K-8.0 (17/32-inch) sprinkler operates at 16 psi residual. What is the discharge?
A K-5.6 sprinkler must deliver 20 gpm. What residual pressure is required at the sprinkler?
A sprinkler is 40 ft above the hydrant residual gauge. About how much pressure is lost to elevation?
During a hydrant flow test, what is residual pressure?
Which statement correctly describes NFPA 13 hanger spacing for steel sprinkler pipe?
What is the maximum distance between hangers on 2 in. steel sprinkler pipe?
For 1 in. steel branch lines, what is the maximum unsupported length between the end sprinkler and the last hanger?
In NFPA 13 hydraulic calculations, which Hazen-Williams C-factors are correct for black steel?
Compared with an otherwise identical wet system, how does NFPA 13 treat the remote design area of a dry-pipe system?
For standard spray sprinklers in Extra Hazard occupancies with a design density of 0.25 gpm/ft² or greater, what are the usual NFPA 13 maximums?
What is the minimum clearance between the top of storage and standard-spray sprinkler deflectors?
How many spare sprinklers must be kept on the premises for a system that has 500 sprinklers?
Under unobstructed construction, how far below the ceiling may a standard upright or pendent spray deflector be placed?
What is the primary reason to use a single-interlock preaction system instead of a wet-pipe system?
What distinguishes a deluge sprinkler system from wet, dry, and preaction systems?
An Extra Hazard Group 1 occupancy is designed at 0.30 gpm/ft² over 2,500 ft². What is the remote-area sprinkler demand before hose stream?
Question · Hard
An Extra Hazard Group 2 occupancy is designed at 0.40 gpm/ft² over 2,500 ft². What total water-supply flow is required if the 500 gpm Extra Hazard hose stream is added at the same residual?
A hydrant test records 72 psi static and 48 psi residual while 1,050 gpm is flowing. Which statement is correct?
What is the maximum floor area on one floor that may be protected by one sprinkler system riser in Light or Ordinary Hazard?
Under NFPA 13 (2019), when must a listed quick-opening device be provided on a dry-pipe system unless water-delivery calculations show compliance without it?
An Ordinary Hazard Group 2 dry-pipe system uses the 0.20 gpm/ft² over 1,500 ft² starting point. After the 30 percent dry-pipe area increase, what is the remote-area sprinkler demand before hose stream?
Which standard on the Mississippi Fire Sprinklers bulletin governs dry chemical extinguishing systems?
Wet And Dry Chemical Systems
Which standard governs wet chemical extinguishing systems for commercial cooking appliances?
Wet chemical restaurant systems are listed primarily for which fire class?
When a listed wet chemical cooking system discharges, what must happen to the fuel or power serving the protected appliances?
Which dry chemical is the common multipurpose ABC agent?
How often must a trained person inspect and maintain a dry chemical or wet chemical system?
Why must a modern commercial fryer line be protected by a listed wet chemical (UL 300) system rather than a dry chemical kitchen system?
In NFPA 17, what is the difference between local-application and total-flooding dry chemical systems?
Where should the manual pull for a commercial cooking wet chemical system be located?
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