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Exam CFI-I Topic 2 Question 76 Discussion

Actual exam question for NFPA's CFI-I exam
Question #: 76
Topic #: 2
Which system piping contains air or nitrogen under pressure at all times?

Suggested Answer: A Vote an answer

The various sprinkler systems are differentiated by the type of fluid or gas in the piping and how they operate:
Standard dry-pipe system (A): Contains air or nitrogen under pressure in the piping at all times. When a sprinkler activates, the pressure is released, allowing water to flow into the pipes and out of the sprinkler heads.
Wet-piping system (B): Contains water in the piping at all times.
Preaction system (C): Contains air or nitrogen under pressure, but water is introduced only when specific detection systems activate.
Deluge system (D): Piping is normally dry, and all sprinklers open simultaneously when a detection system triggers water flow.
Reference:
NFPA 13, Chapter 7: Types and operation of sprinkler systems.

by Elmer at Apr 06, 2025, 03:16 AM

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