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Exam CFI-I Topic 2 Question 66 Discussion

Actual exam question for NFPA's CFI-I exam
Question #: 66
Topic #: 2
What is the minimum diameter allowed for piping serving fire hydrants on private fire service mains?

Suggested Answer: B Vote an answer

Comprehensive and Detailed Step-by-Step Explanation:
Fire Hydrant Piping Diameter:
Per NFPA 24 (Standard for the Installation of Private Fire Service Mains and Their Appurtenances), Section 5.2.1, the minimum diameter for piping serving fire hydrants on private fire service mains is 6 inches (152.4 mm).
Why 6 Inches is Required:
A minimum 6-inch pipe ensures sufficient water flow and pressure to meet firefighting demands.
Other Options Explained:
Option A (4 in): Too small; insufficient for hydrant water supply.
Option C (8 in) and Option D (10 in): Acceptable but exceed the minimum requirement.
Summary:
The minimum diameter for piping serving fire hydrants on private fire service mains is 6 inches (152.4 mm).

by Dempsey at Feb 03, 2026, 06:15 AM

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Here are all the actual test exam dumps for IT exams. Most people prepare for the actual exams with our test dumps to pass their exams. So it's critical to choose and actual test pdf to succeed.

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