Practice Test GeeksCFPS (Certfied Fire Protection Specialist) Practice Test
← All CFPS Flashcard Decks

Water-Based Suppression Systems Flashcards

7 cards from real CFPS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Water-Based Suppression Systems flashcards as text

  1. In hydraulic calculations for sprinkler systems, what does the Hazen-Williams formula calculate?

    Answer: Friction loss per foot of pipe

    The Hazen-Williams formula (p = 4.52 × Q^1.85 / (C^1.85 × d^4.87)) calculates friction loss per unit length of pipe based on flow, diameter, and pipe material coefficient.

  2. A sprinkler has a K-factor of 5.6 and is discharging at 25 psi. What is the approximate flow rate using Q = K × √P?

    Answer: 28 gpm

    Using Q = K × √P: 5.6 × √25 = 5.6 × 5 = 28 gpm — the fundamental sprinkler discharge formula.

  3. What is the Hazen-Williams C-factor assigned to new black steel (Schedule 40) pipe per NFPA 13?

    Answer: 120

    NFPA 13 assigns a Hazen-Williams C-factor of 120 to new black steel pipe, reflecting its moderate interior smoothness.

  4. In a hydraulically designed sprinkler system, what does the term 'remote area' refer to?

    Answer: The hydraulically most demanding zone that must receive the full design density

    The remote area is the hydraulically most demanding design area; proving adequate density there confirms the entire system is adequately supplied.

  5. Per NFPA 15, water spray fixed systems are designed to provide:

    Answer: Both direct fire suppression on specific hazards and exposure protection of adjacent equipment or structures

    NFPA 15 water spray systems serve dual roles: suppressing fires on specific hazard targets and protecting adjacent equipment or structures from heat exposure.

  6. What is the primary purpose of a pressure-reducing valve (PRV) installed at a standpipe hose valve outlet?

    Answer: Limit outlet pressure to safe levels for hose line handling and nozzle operation

    PRVs on standpipe outlets limit pressure to safe levels, protecting firefighters from dangerously high nozzle reaction forces caused by excessive supply pressure.

  7. Per NFPA 13, what design density and remote area size apply to an Ordinary Hazard Group 2 occupancy?

    Answer: 0.20 gpm/ft² over 1,500 sq ft

    NFPA 13 prescribes 0.20 gpm/ft² over a 1,500 sq ft remote area as the minimum design criteria for Ordinary Hazard Group 2 occupancies.