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NFPA CWBSP Exam Questions
- Topic 1: Project Development: In this topic of the CWBSP exam, Water-Based Fire Protection System Designers will be assessed on their ability to understand project scope, identify occupancy types, and review contract documents. Designers will need to demonstrate proficiency in evaluating plans, specifications, and submittal approval requirements, ensuring their capability to manage the foundational stages of a water-based fire protection system design.
- Topic 2: Survey Existing Systems: This topic tests the designer's skills in reviewing and assessing existing fire protection systems. Designers will be evaluated on their ability to evaluate system components, identify needs, and verify compliance with codes. Additionally, they must demonstrate competence in understanding inspection, testing, and coordinating interfaces between systems to ensure compliance and system adequacy.
- Topic 3: Design System Layouts: In this part of the exam, Water-Based Fire Protection System Designers will be tested on their ability to design appropriate water-based fire protection systems. Designers must determine system types, evaluate water supply, and design layouts, including hangers and bracing. The exam will assess compliance with contracts, codes, and standards, as well as coordination with other systems.
- Topic 4: Hydraulic Calculations: The hydraulic calculations topic evaluates a designer’s understanding of hydraulic formulas and design methods. Designers will be tested on their ability to apply these principles, particularly in evaluating the hydraulically most remote calculation area. This topic is critical to ensuring the efficiency and effectiveness of the fire protection system.
Free NFPA CWBSP Exam Actual Questions
Note: Premium Questions for CWBSP were last updated On Jul. 08, 2025 (see below)
For an existing antifreeze system without a backflow prevention device, what size hole is required in the check valve separating the supply and the antifreeze?
If sprinklers are above the level of the water supply to the antifreeze system, a check valve with a 1/32 in. (0.8 mm) hole in the clapper shall be provided in the U-loop.
A 4 in. (102 mm) nominal diameter Schedule 10 sprinkler main is to be supported from the structure utilizing a trapeze
hanger with a span of 8 ft (2.4 m). Using Schedule 40 pipe for the trapeze hanger, what is the minimum diameter pipe
that should be used?
For supporting a 4 in. Schedule 10 sprinkler main with a trapeze hanger spanning 8 ft, a Schedule 40 pipe of at least 2 in. in diameter is typically recommended. This size provides adequate strength for the span and weight of the sprinkler main.
A sprinkler system has been installed with 100 sprinklers. What is the minimum number of spare sprinklers to be provided?
According to NFPA 13, a supply of at least six spare sprinklers shall be maintained on the premises for facilities having under 300 sprinklers. Since the sprinkler system has been installed with 100 sprinklers, the minimum number of spare sprinklers to be provided is six.
1: https://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and-standards/detail?code=13 2: https://www.nfpa.org/product/nfpa-13-handbook/p0013hb
For a hydraulically calculated light hazard area under a mezzanine constructed of 2 in. (50 mm) x 14 in. (350 mm)
combustible solid wood members spaced 4 ft (1.2 m) on center, what is the maximum protection area for standard
upright spray sprinklers?
For a hydraulically calculated light hazard area under a mezzanine with the given construction and spacing, the maximum protection area per standard upright spray sprinkler is typically around 130 ft (12.1 m), considering the obstructions and distribution challenges posed by the mezzanine structure.
How much pressure is lost to friction as 1,200 gpm (4542 L/min) travels through 200 ft (61 m) of 5 in. (130 mm) schedule 40 steel pipe with a C-factor of 120?
The pressure loss due to friction for 1,200 gpm traveling through 200 ft of 5 in. schedule 40 steel pipe with a C-factor of 120 is approximately 21 psi (1.45 bar). This calculation takes into account the flow rate, pipe length, diameter, and roughness factor.
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