合格させちゃうWater-Based Systems Professional CWBSP試験簡単かつ正確なPDF問題 [2025年03月06日]
CWBSP認証試験問題集解答を提供しています
NFPA CWBSP 認定試験の出題範囲：
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質問 # 49
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?
- A. 225 ft2 (20.9 m2)
- B. 168 ft2 (15.6 m2)
- C. 130 ft2 (12.1 m2)
- D. 200 ft2 (18.6 m2)
正解：C
解説：
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 ft² (12.1 m²), considering the obstructions and distribution challenges posed by the mezzanine structure.
References: NFPA 13 provides guidelines for the design and installation of sprinkler systems, including considerations for obstructions and beam construction that may affect sprinkler coverage.
質問 # 50
What is the pressure at a sprinkler head with a flow of 33 gpm (125 L/min) with a K-factor of 5.6 (80)?
- A. 54.8 psi (3.78 bar)
- B. 34.7 psi (2.4 bar)
- C. 15.2 psi (1.1 bar)
- D. 22.3 psi (1.54 bar)
正解：D
解説：
The pressure at a sprinkler can be calculated using the formula P=Q²/K², where P is the pressure in psi, Q is the flow rate in gpm, and K is the K-factor of the sprinkler. Substituting the given values (Q=33 gpm, K=5.6) yields a pressure of approximately 22.3 psi.
References: Basic hydraulic principles applied in the design and analysis of sprinkler systems as outlined in NFPA 13.
質問 # 51
Which of the following is a mandatory referenced publication in NFPA 13?
- A. NFPA 20
- B. NFPA 10
- C. NFPA 291
- D. NFPA 12
正解：A
解説：
NFPA 20, which covers the installation of stationary pumps for fire protection, is a mandatory reference in NFPA 13. This standard is essential for ensuring that fire pumps, which are critical components of many sprinkler systems, meet the necessary performance and installation criteria.
References: NFPA 13 references NFPA 20 as a key standard for the design and installation of fire pump assemblies, ensuring they provide adequate pressure and flow for sprinkler systems.
質問 # 52
What is the minimum exposed barrel length for a dry sprinkler barrel exposed to 50°F (10#) when the discharge end is in an environment of -30°F (34#)?
- A. 16 in. (400 mm)
- B. 18 in. (450 mm)
- C. 3 in. (75 mm)
- D. 8 in. (200 mm)
正解：B
解説：
For dry sprinklers, the exposed barrel length must be sufficient to prevent freezing. In extreme temperature differentials, such as from 50°F to -30°F, a longer barrel length, such as 18 inches, may be required to ensure the sprinkler remains functional.
References: NFPA 13 guidelines for the installation of dry sprinklers, considering the insulation and barrel length requirements to prevent freezing in cold environments.
質問 # 53
What is the minimum calculated design area for a light hazard sprinkler system protecting an open office space with a noncombustible acoustic ceiling tile installed 6 in. (150 mm) below the bottom of solid wood joists?
- A. 1,950 ft2 (181.1 m2)
- B. 3,000 ft2 (278.7 m2)
- C. 1,500 ft2 (139.35 m2)
- D. 900 ft2 (83.6 m2)
正解：C
解説：
For a light hazard occupancy like an open office space with a noncombustible ceiling, NFPA 13 typically requires a minimum calculated design area of 1,500 ft². This accounts for the lower fireload and the effective coverage of sprinklers in such environments.
References: NFPA 13 design criteria for light hazard occupancies, which specify the minimum design areas for sprinkler systems based on occupancy type and ceiling configuration.
質問 # 54
A sprinkler with a blue glass bulb represents a temperature classification of
- A. high.
- B. intermediate.
- C. ordinary.
- D. extra high.
正解：A
質問 # 55
Which of the following should be considered when choosing an occupancy?
- A. Ceiling height to underside of structural members
- B. Susceptibility for change in fuel characteristics
- C. Access to egress
- D. Size of space
正解：B
解説：
When choosing an occupancy classification, susceptibility for change in fuel characteristics is a crucial factor.
This considers the potential for the stored or used materials in the space to change in a way that might affect the fire risk or required protection level.
References: NFPA 13 categorizes occupancies based on factors such as the type and combustibility of contents, which directly influence the fire protection strategy.
質問 # 56
For an Ordinary Hazard with a design area of 1,500 ft2 (140 m2), what is the minimum number of standard pendent sprinklers required?
- A. 18 sprinklers
- B. 20 sprinklers
- C. 14 sprinklers
- D. 12 sprinklers
正解：D
解説：
https://www.nfpa.org/news-blogs-and-articles/blogs/2023/01/30/basics-of-fire-sprinkler-calculations-part-1
質問 # 57
What is the required density for a warehouse with 10 ft (3 m) deep multiple-row racks without an in-rack sprinkler system that contains a nonencapsulated storing Class IlI commodity on wooden pallets and has a storage height of
18 ft (5.4 m) and 8 ft (2.4 m) aisles, and is using standard, ordinary temperature sprinkler heads?
- A. 0.33 gpm/ft2 (13 mm/min)
- B. 0.25 gpm/ft2 (10.2 mm/min)
- C. 0.52 gpm/ft2 (20.8 mm/min)
- D. 0.44 gpm/ft2 (17.9 mm/min)
正解：A
解説：
For a warehouse with the described characteristics, a design density of 0.33 gpm/ft² is a common requirement to ensure adequate protection for Class III commodities on wooden pallets, taking into account the storage configuration and commodity type.
References: NFPA 13 guidelines for storage sprinkler system design, which include densityrequirements based on commodity classification and storage arrangement.
質問 # 58
Where must a diesel engine driven fire pump's fuel tank be located for areas subject to temperatures below 32° F (0°#)?
- A. The room below the fire pump.
- B. The same room as the fire pump.
- C. The room next to the fire pump room.
- D. The exterior of the building.
正解：B
解説：
The fuel tank for a diesel engine-driven fire pump must be located in the same room as the fire pump, especially in areas subject to freezing temperatures, to ensure that the diesel fuel remains at a usable temperature and the pump is readily available for operation during an emergency.
References: NFPA 20 provides the standards for the installation of stationary pumps for fire protection, including the requirements for diesel engine-driven pumps and their fuel supply.
質問 # 59
A device for use in applications requiring special water discharge patterns, directional spray, or other unusual discharge characteristics, is known as a
- A. water mist nozzle.
- B. nozzie.
- C. CMSA sprinkler.
- D. special sprinkler.
正解：D
解説：
A special sprinkler is a device for use in applications requiring special water discharge patterns, directional spray, or other unusual discharge characteristics, as defined by NFPA 13. Examples of special sprinklers include residential sprinklers, exposure protection sprinklers, water curtains, and sprinkler-protected glazing.
Special sprinklers have different design and installation requirements than standard spray sprinklers.
References: NFPA 13, 2019 edition, section 3.3.27.1; NFPA 13 Handbook, 2019 edition, page 31.
A special sprinkler is designed for specific applications that require unique water discharge patterns, directional spray, or other specialized discharge characteristics. These sprinklers are tailored for particular fire risks or architectural constraints where standard sprinklers may not provide adequate protection.
References: NFPA 13's definitions and classifications of sprinklers, including special sprinklers for unique fire protection challenges.
質問 # 60
What is the minimum calculated design area for a dry system protecting a light hazard attic space with a roof slope exceeding a rise of 2 units in a run of 12 units and a height at the peak of 10 ft (3 m) above the bottom of the truss using quick response sprinklers?
- A. 1,170 ft2 (108.7 m2)
- B. 1,950 ft2 (181.1 m2)
- C. 1,521 ft2 (141.3 m2)
- D. 2,535 ft2 (235.5 m2)
正解：A
解説：
For a dry system protecting a light hazard attic with the described roof slope and peak height, a minimum calculated design area would typically be around 1,170 ft². This accounts for the attic's geometry and the use of quick response sprinklers, which can effectively cover the area with a smaller design area compared to standard response sprinklers.
References: NFPA 13 guidelines for sprinkler system design criteria, including considerations for attic spaces and the impact of roof slopes on design areas.
質問 # 61
When backflow prevention valves are installed on existing pipe scheduled systems, the friction losses of the device shall be accounted for when determining
- A. static pressure.
- B. system flow requirements.
- C. residual pressure.
- D. system GPM requirements.
正解：C
解説：
When backflow prevention devices are added to a system, their associated friction losses can affect the residual pressure available for the sprinkler system operation. Therefore, it's important to account for these losses to ensure the system maintains the required pressure during operation.
References: NFPA 13 includes considerations for the installation of backflow preventers and their impact on system design, emphasizing the need to account for device-related friction losses to maintain adequate residual pressure in the sprinkler system.
質問 # 62
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?
- A. 1.5 in. (40 mm)
- B. 3 in. (75 mm)
- C. 2 in. (50 mm)
- D. 2.5 in. (65 mm)
正解：C
解説：
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.
References: Engineering principles and best practices for hanger selection and sizing in sprinkler system installations.
質問 # 63
For a dry sprinkler installed in an insulated freezer box with an internal ambient temperature of -20°F (-29#) where the barrel is exposed to an ambient temperature area of 40°F (4C), what is the minimum exposed barrel length required?
- A. 14 in. (350 mm)
- B. 16 in. (400 mm)
- C. 18 in. (450 mm)
- D. 12 in. (300 mm)
正解：C
解説：
For a dry sprinkler in a freezer with an internal temperature of -20°F and an external ambient temperature of
40°F, a minimum exposed barrel length of 18 in. is typically recommended. This length helps prevent freezing within the barrel while accommodating temperature differentials.
References: Installation guidelines for dry sprinklers in environments with significant temperature variations, ensuring system functionality and freeze protection.
質問 # 64
In a three-story apartment building protected with an NFPA 13R system utilizing quick-response sprinklers, the minimum density/area requirement shall be?
- A. 0.20 gpm/ft2 (8.1 mm/min)
- B. 0.15 gpm/ft2 (6.1 mm/min)
- C. 0.10 gpm/ft2 (4.1 mm/min)
- D. 0.05 gpm/ft2 (2.0 mm/min)
正解：C
解説：
In a three-story apartment building protected with an NFPA 13R system utilizing quick-response sprinklers, the minimum density/area requirement is typically 0.10 gpm/ft². This density ensures adequate coverage for residential occupancies with a moderate level of combustibles.
References: NFPA 13R specifies requirements for the design and installation of sprinkler systems in residential occupancies up to four stories in height, including minimum density requirements.
質問 # 65
How much pressure is lost due to elevation in water flowing in a pipe from 6 ft (1.8 m) high to 15 ft (4.6 m) high?
- A. 3.897 psi (2.6850 bar)
- B. 4.050 psi (2.6850 bar)
- C. 4.5 psi (3.1005 bar)
- D. 3.6 psi (2.4804 bar)
正解：A
解説：
The pressure lost due to elevation in water flowing from 6 ft to 15 ft high is approximately 3.897 psi, calculated based on the height difference and the principle that each foot of elevation change results in a pressure change of 0.433 psi.
References: Basic hydraulic principles applicable in fire protection engineering, which include calculating the impact of elevation changes on water pressure in a piping system.
質問 # 66
When utilizing ordinary temperature CMDA sprinkler protection for a single-row rack storage of an unencapsulated Class I commodity stored 15 ft (4.6 m) high without in-rack sprinklers with 8 ft (2.4 m) aisles, what is the minimum design density required?
- A. 0.20 gpm/ft2 (8.1 mm/min)
- B. 0.86 gpm/ft2 (35 mm/min)
- C. 0.32 gpm/ft2 (13 mm/min)
- D. 0.54 gpm/ft2 (22 mm/min)
正解：A
解説：
For single-row rack storage of an unencapsulated Class I commodity stored up to 15 ft high without in-rack sprinklers and with 8 ft aisles, a design density of 0.20 gpm/ft² is commonly used as a starting point in accordance with NFPA 13 guidelines for ordinary hazard occupancies.
References: NFPA 13's commodity classification and design criteria for sprinkler systems, providing guidance on design densities based on the type of storage and commodity classification.
質問 # 67
An existing sprinkler system in a 25 ft (1.5 m) tall building is found to be designed using K-8.0 (115) high temperature control mode density/area (CMDA) sprinklers with a design criteria of 0.35 gpm/ft2 (13.3 mm/min) over
2000 ft2 (186 m2). What is the maximum storage height permitted for double-row rack storage with 8 ft (2.4 m) aisles of a nonencapsulated Class IV commodity?
- A. 18.5 ft (5.6 m)
- B. 16.5 ft (5.0 m)
- C. 20.5 ft (6.2 m)
- D. 15.5 ft (4.7 m)
正解：B
解説：
The maximum storage height permitted for double-row rack storage of a nonencapsulated Class IV commodity with the specified design criteria would likely be around 16.5 feet. This takes into account the density and area coverage required for protecting Class IV commodities.
References: NFPA 13 provides guidelines for storage arrangements, including maximum storage heights and design criteria based on commodity classifications.
質問 # 68
A warehouse has palletized storage of empty wood crates on wood pallets to a height of 11 ft (3.4 m). What is the minimum design density?
- A. 0.20 gpm/ft2 (8.1 mm/min)
- B. 0.23 gpm/ft2 (9.2 mm/min)
- C. 0.25 gpm/ft2 (10.2 mm/min)
- D. 0.15 gpm/ft2 (6.1 mm/min)
正解：A
解説：
The minimum design density for protecting palletized storage of empty wood crates on wood pallets up to a certain height is determined by considering the combustibility of the materials and the configuration of the storage. A design density of 0.20 gpm/ft² is often recommended for such light hazard commodities to provide adequate water distribution over the fire area.
References: NFPA 13 guidelines for calculating design densities based on the type of commodity, storage arrangement, and height of storage.
質問 # 69
What is the required minimum design density/area for protection of floor stacked, idle wood pallets to a height of
8 ft (2.4 m) under a 30 ft (9.1 m) roof deck using high expansion foam with a K11.2 (160) CMDA sprinkler?
- A. 0.225 gpm/ft2 (9.15 mm/min) over 2,500 ft2 (230 m2)
- B. 0.225 gpm/ft2 (9.15 mm/min) over 1,250 ft2 (115 m2)
- C. 0.45 gpm/ft2 (18.3 mm/min) over 1,250 ft2 (115 m2)
- D. 0.45 gpm/ft2 (18.3 mm/min) over 2,500 ft2 (230 m2)
正解：A
解説：
For floor-stacked idle wood pallets, a design density of 0.225 gpm/ft² over a minimum design area is typically used for calculating water supply requirements. The larger area option (2,500 ft²) provides a more conservative approach to ensuring adequate protection.
References: Fire protection strategies for storage using NFPA 13 guidelines, considering the specific challenges posed by combustible commodities like wood pallets.
質問 # 70
What is the maximum pressure rating when using standard weight pattern malleable iron fittings that are 6 in.
(150 mm) in size and smaller?
- A. 175 psi (12 bar)
- B. 200 psi (14 bar)
- C. 300 psi (21 bar)
- D. 400 psi (28 bar)
正解：C
解説：
Standard weight pattern malleable iron fittings that are 6 inches in size and smaller typically have a maximum pressure rating of 300 psi (21 bar). This rating ensures that the fittings can withstand the pressure demands of most fire sprinkler systems without failure.
References: Fitting manufacturers provide specifications for malleable iron fittings, including their pressure ratings, which must comply with standards such as those set forth by ASTM and ANSI.
質問 # 71
A five story building is proposed, with the ground floor being used for retail space and the upper four floors for apartments. There is no 3-hour rated building separation between the retail and residential spaces. Which standard is applicable for the design of the fire sprinkler system?
- A. NFPA 13
- B. NFPA 13D
- C. NFPA 13R
- D. NFPA 20
正解：A
解説：
NFPA 13 is the applicable standard for the design of the fire sprinkler system in a mixed-use building with retail space and residential apartments without a 3-hour rated separation. NFPA 13 provides comprehensive coverage for commercial and residential spaces in multi-use buildings.
References: NFPA 13 outlines requirements for the installation of sprinkler systems in various occupancies, including mixed-use buildings, to ensure adequate fire protection.
質問 # 72
A sprinkler system employing automatic sprinklers that are attached to a piping system that contains air that might or might not be under pressure, with a supplemental detection system installed in the same areas as the sprinklers, is known as a:
- A. Dry System
- B. Preaction System
- C. Wet System
- D. Deluge System
正解：B
解説：
A preaction system is a sprinkler system employing automatic sprinklers that are attached to a piping system that contains air that might or might not be under pressure, with a supplemental detection system installed in the same areas as the sprinklers. The operation of the detection system opens a valve that permits water to flow into the piping system and to be discharged from any sprinklers that have operated. Preaction systems are used to protect areas where accidental activation is undesired, such as museums, libraries, or data centers.
References: NFPA 13, 2019 edition, section 3.3.22.1; NFPA 13 Handbook, 2019 edition, page 30; Types of Sprinkler Systems.
質問 # 73
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検証済みで更新されたCWBSP問題集と解答で100%一発合格保証の問題集：https://drive.google.com/open?id=1azD6TzxFiVS8zW9LTOTNeCfKLHiT9qVj
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