NFPA 13D – Sprinklers for One- & Two-
Family Dwellings Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
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1. Which occupancy type is NFPA 13D primarily intended to cover?
A. High-rise apartments
B. One- and two-family dwellings and manufactured homes
C. Commercial office buildings
D. Industrial warehouses
Rationale: NFPA 13D specifically addresses the design and
installation of sprinkler systems in one- and two-family dwellings and
manufactured homes, not larger commercial or industrial buildings.
2. What is the minimum design density for a NFPA 13D sprinkler system?
A. 0.20 gpm/ft²
, B. 0.15 gpm/ft²
C. 0.10 gpm/ft²
D. 0.05 gpm/ft²
Rationale: NFPA 13D requires a minimum design density of 0.10
gpm/ft² over the most hydraulically demanding area to ensure
adequate protection in residential occupancies.
3. Sprinkler systems in NFPA 13D are typically designed to:
A. Control a fire until the fire department arrives
B. Control a fire long enough to allow safe occupant escape
C. Suppress fire completely without any external assistance
D. Protect only contents, not structure
Rationale: NFPA 13D systems are designed to control fires to allow
occupants to escape safely, rather than fully extinguishing large fires.
4. What is the maximum allowable spacing between sprinklers in a
typical NFPA 13D system?
A. 10 feet
B. 14 feet
C. 16 feet
D. 12 feet
Rationale: The maximum spacing of sprinklers in NFPA 13D systems
is generally 12 feet, ensuring adequate coverage for residential
areas.
,5. How many sprinklers are required in a typical single-family dwelling
with NFPA 13D?
A. At least one per room
B. Sufficient to cover all habitable areas and attached garages
C. Only in bedrooms
D. Only in kitchen and living areas
Rationale: NFPA 13D requires sprinklers to protect all habitable
rooms and attached garages to ensure full residential coverage.
6. NFPA 13D systems can use which type of water supply?
A. Only public water mains
B. Public or private water supply, including storage tanks
C. Only private wells
D. Only gravity-fed systems
Rationale: NFPA 13D allows flexibility in water supply sources, as
long as the system meets minimum pressure and flow requirements.
7. Residential sprinklers are typically:
A. Fast response only
B. Standard response only
C. Either quick response or residential type
D. High-temperature only
Rationale: NFPA 13D allows the use of quick-response or residential-
type sprinklers designed for early fire suppression in homes.
, 8. What is the minimum temperature rating for sprinklers in a kitchen
under NFPA 13D?
A. 135°F
B. 155°F
C. 175°F
D. 200°F
Rationale: Kitchens typically require higher temperature-rated
sprinklers (175°F) due to the likelihood of heat exposure from
cooking appliances.
9. NFPA 13D allows which type of pipe material?
A. Cast iron only
B. Copper only
C. CPVC, steel, or copper
D. PVC only
Rationale: NFPA 13D permits CPVC, steel, and copper piping, as these
materials are compatible with residential sprinkler systems.
10. In NFPA 13D, the minimum system operating pressure is usually
based on:
A. The water meter size
B. The sprinkler manufacturer’s required flow
C. The building height
D. The type of occupancy
Rationale: Minimum operating pressure is determined by the
Family Dwellings Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which occupancy type is NFPA 13D primarily intended to cover?
A. High-rise apartments
B. One- and two-family dwellings and manufactured homes
C. Commercial office buildings
D. Industrial warehouses
Rationale: NFPA 13D specifically addresses the design and
installation of sprinkler systems in one- and two-family dwellings and
manufactured homes, not larger commercial or industrial buildings.
2. What is the minimum design density for a NFPA 13D sprinkler system?
A. 0.20 gpm/ft²
, B. 0.15 gpm/ft²
C. 0.10 gpm/ft²
D. 0.05 gpm/ft²
Rationale: NFPA 13D requires a minimum design density of 0.10
gpm/ft² over the most hydraulically demanding area to ensure
adequate protection in residential occupancies.
3. Sprinkler systems in NFPA 13D are typically designed to:
A. Control a fire until the fire department arrives
B. Control a fire long enough to allow safe occupant escape
C. Suppress fire completely without any external assistance
D. Protect only contents, not structure
Rationale: NFPA 13D systems are designed to control fires to allow
occupants to escape safely, rather than fully extinguishing large fires.
4. What is the maximum allowable spacing between sprinklers in a
typical NFPA 13D system?
A. 10 feet
B. 14 feet
C. 16 feet
D. 12 feet
Rationale: The maximum spacing of sprinklers in NFPA 13D systems
is generally 12 feet, ensuring adequate coverage for residential
areas.
,5. How many sprinklers are required in a typical single-family dwelling
with NFPA 13D?
A. At least one per room
B. Sufficient to cover all habitable areas and attached garages
C. Only in bedrooms
D. Only in kitchen and living areas
Rationale: NFPA 13D requires sprinklers to protect all habitable
rooms and attached garages to ensure full residential coverage.
6. NFPA 13D systems can use which type of water supply?
A. Only public water mains
B. Public or private water supply, including storage tanks
C. Only private wells
D. Only gravity-fed systems
Rationale: NFPA 13D allows flexibility in water supply sources, as
long as the system meets minimum pressure and flow requirements.
7. Residential sprinklers are typically:
A. Fast response only
B. Standard response only
C. Either quick response or residential type
D. High-temperature only
Rationale: NFPA 13D allows the use of quick-response or residential-
type sprinklers designed for early fire suppression in homes.
, 8. What is the minimum temperature rating for sprinklers in a kitchen
under NFPA 13D?
A. 135°F
B. 155°F
C. 175°F
D. 200°F
Rationale: Kitchens typically require higher temperature-rated
sprinklers (175°F) due to the likelihood of heat exposure from
cooking appliances.
9. NFPA 13D allows which type of pipe material?
A. Cast iron only
B. Copper only
C. CPVC, steel, or copper
D. PVC only
Rationale: NFPA 13D permits CPVC, steel, and copper piping, as these
materials are compatible with residential sprinkler systems.
10. In NFPA 13D, the minimum system operating pressure is usually
based on:
A. The water meter size
B. The sprinkler manufacturer’s required flow
C. The building height
D. The type of occupancy
Rationale: Minimum operating pressure is determined by the
