TFM 10 Exam Study Guide | NFPA 24 – Standard for the Installation of Private Fire Service Mains and Their Appurtenances | Verified Questions and Detailed Rationales | Graded A+

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TFM 10 Exam Study Guide | NFPA 24 – Standard for the
Installation of Private Fire Service Mains and Their
Appurtenances | Verified Questions and Detailed Rationales
| Graded A+


1. According to NFPA 24, what is the primary scope of the standard?


A. It covers the installation of fire pumps and their controllers


B. It covers the minimum requirements for the installation of private fire service mains and


their appurtenances


C. It covers the design and installation of automatic sprinkler systems


D. It covers the maintenance and testing of fire extinguishers



☑ Correct Answer: B


☑ Explanation: NFPA 24 specifically addresses the minimum requirements for the

installation of private fire service mains and their appurtenances, which supply water to private


hydrants and water-based fire protection systems. Option A describes NFPA 20 (Fire Pumps).


Option C describes NFPA 13 (Sprinkler Systems). Option D describes NFPA 10 (Portable Fire


Extinguishers).

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2. NFPA 24 applies to private fire service mains that supply which of the following?


A. Automatic sprinkler systems only


B. Private hydrants only


C. Automatic sprinkler systems, open sprinkler systems, water spray fixed systems, foam


systems, and private hydrants


D. Domestic water systems only



☑ Correct Answer: C


☑ Explanation: NFPA 24 covers private fire service mains supplying automatic sprinkler

systems, open sprinkler systems, water spray fixed systems, foam systems, and private hydrants.


Options A and B are incomplete. Option D is incorrect as domestic water systems are not the


primary focus of NFPA 24.




3. Which of the following is NOT covered by NFPA 24?


A. Private fire service mains


B. Fire hydrants

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C. Fire pumps


D. Valves and appurtenances



☑ Correct Answer: C


☑ Explanation: NFPA 24 covers private fire service mains, fire hydrants, valves, and

appurtenances, but it does not cover fire pumps. Fire pumps are covered under NFPA 20.


Options A, B, and D are all within the scope of NFPA 24.




4. What is the minimum nominal diameter of a private fire service main to which NFPA 24


applies?


A. 2 inches


B. 3 inches


C. 4 inches


D. 6 inches



☑ Correct Answer: C


☑ Explanation: NFPA 24 applies to private fire service mains with a nominal diameter of 4

, 4


inches or larger. Options A and B are below the threshold. Option D is larger but not the


minimum.




5. NFPA 24 does NOT apply to underground fire mains serving sprinkler systems designed and


installed in accordance with NFPA 13D. What is NFPA 13D?


A. Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and


Manufactured Homes


B. Standard for the Installation of Sprinkler Systems in High-Rise Buildings


C. Standard for the Installation of Sprinkler Systems in Warehouses


D. Standard for the Installation of Sprinkler Systems in Hospitals



☑ Correct Answer: A


☑ Explanation: NFPA 13D is the standard for the installation of sprinkler systems in one-

and two-family dwellings and manufactured homes. Options B, C, and D are covered by other


NFPA standards (e.g., NFPA 13 for commercial buildings).




6. What is the definition of a "private fire service main" according to NFPA 24?