Fire-Inspector-II 67 - Fire Inspector II Exam Question and Answers

ï‚· Reference to ICC Fire Code Regulations:

According to the International Fire Code (IFC) Section 308.1.5 (2021 Edition), the use of open-flame devices, including candles, is prohibited in dormitories, sleeping rooms, and similar occupancies unless specifically approved by the fire code official.

The regulation exists to prevent fire hazards in areas with high occupant density and potentially limited egress routes.

ï‚· Fire Safety Concerns in Dormitories:

Dormitories typically contain highly combustible materials such as bedding, curtains, and furniture, making them susceptible to rapid fire spread.

The presence of multiple residents in a shared living space increases the risk of fire-related casualties.

Even in sprinklered buildings, candles pose an unnecessary ignition risk that could endanger occupants before the activation of fire suppression systems.

ï‚· Clarification of Incorrect Answer Choices:

B. may be used in a sprinklered dormitory → Incorrect

While fire sprinklers help control fires, they do not prevent ignition, and the prohibition still applies regardless of sprinkler systems.

C. must be kept a minimum of 12 inches from combustibles → Incorrect

This rule applies to general open-flame devices in some circumstances but does not override the outright ban on candles in dormitories.

D. must be kept a minimum of 36 inches from combustibles → Incorrect

Similar to option C, maintaining a distance from combustibles does not exempt candles from being prohibited in dormitory settings.

ï‚· Conclusion:

The correct and verified answer is A (Candles may not be used) based on the International Fire Code (IFC) Section 308.1.5, ensuring fire safety compliance in dormitory settings.

IFC Section 3804.1 classifies aerosol storage as Group H (high-hazard) if flammable, fitting option A. Options B and C are subgroups (H-2, H-3), while D (Group S-1) is for moderate-hazard storage, not applicable. This is consistent with the study guide's occupancy classifications.

References: Fire Inspector II Study Guide, IFC Section 3804.1.

Inspection checklists are valuable tools for fire inspectors, ensuring that key inspection points are consistently reviewed. However, one of their limitations is that they may not cover every potential code violation. This is due to the complexity and variability of fire codes, as well as the uniqueness of each inspection scenario.

Reference to Fire Inspector Documentation:

1. 2021 IFC (International Fire Code) & ICC Fire Inspection Manual

The ICC Fire Inspection Manual (Chapter 4 – Fire Inspection Procedures) emphasizes that while checklists help streamline inspections, they should not be the sole reference. Inspectors must be prepared to identify violations beyond those listed.

2. NFPA 1031 – Standard for Professional Qualifications for Fire Inspector and Plan Examiner

NFPA 1031 (Chapter 4: Fire Inspector I and II Roles & Responsibilities) states that inspectors must apply critical thinking and code knowledge rather than rely solely on pre-prepared lists.

3. 2021 Fire Inspector II Study Guide – ICC

This guide highlights that checklists are helpful but should be supplemented with a thorough knowledge of fire codes to ensure comprehensive inspections.

Detailed Explanation:

Option A (Incorrect): The fact that checklists become a public record is generally not a "problem" but rather a standard practice for transparency and accountability.

Option B (Incorrect): While checklists may take time to complete, this is a minor administrative issue rather than a fundamental problem with their use.

Option C (Correct): The main issue is that no checklist can comprehensively cover all possible violations, requiring inspectors to use judgment and knowledge.

Option D (Incorrect): Although legal appeals may occur, checklists themselves do not typically serve as the direct basis for such challenges.

Thus, the verified and correct answer is: C. They may not address all of the code violations which may be encountered.

The fire-resistance rating requirements for different building elements in Type IV (Heavy Timber) construction are specified in the 2021 International Building Code (IBC), Table 601 – Fire-Resistance Rating Requirements for Building Elements (Hours).

IBC Table 601 – Fire Resistance for Type IV Construction:

Interior nonbearing walls and partitions in Type IV construction require 0 hours of fire resistance.

This is because Type IV construction primarily relies on large, heavy timber elements that provide inherent fire resistance.

Why Other Options Are Incorrect?

B. 1 hour – Incorrect, as nonbearing interior walls in Type IV construction are not required to have a fire-resistance rating.

C. 1-1/2 hours – Not required by code.

D. 2 hours – Only structural elements like exterior walls in some cases may require fire resistance, but nonbearing interior partitions do not.

✅ Correct Answer: A. 0 hours

ï‚· Reference to Fire Code Requirements for Clearance Between Combustible Fibers and Sprinklers:

The International Fire Code (IFC 2021), Section 3206.6, states that the minimum clearance between the tops of piles of combustible fibers and sprinkler deflectors shall be no less than 3 feet.

This requirement ensures that the sprinkler system operates efficiently and that water distribution is not obstructed in case of a fire.

ï‚· Fire Safety Concerns:

Combustible fibers pose a high fire risk due to their flammability and tendency to generate large amounts of heat and smoke.

Adequate clearance prevents heat accumulation near the sprinkler heads, ensuring they activate at the correct temperature.

ï‚· Clarification of Incorrect Answer Choices:

A. 2 ft. → Incorrect

Too low and could obstruct sprinkler operation, reducing water distribution effectiveness.

C. 4 ft. → Incorrect

Exceeds the required minimum per the IFC 3206.6 standard, though more clearance is beneficial.

D. 5 ft. → Incorrect

More than the code requirement, but the mandatory clearance is 3 feet.

ï‚· Conclusion:

The correct and verified answer is B (3 feet) based on IFC 3206.6, ensuring proper sprinkler performance and fire safety for combustible fiber storage.

In automobile refinishing spray booths where drying by heat occurs inside the same spray booth, fire codes require interlocks to prevent ignition hazards.

Before activating the drying apparatus, the ventilation system must purge the booth of spray vapors for at least 5 minutes to remove flammable concentrations.

Reference to Fire Inspector Documentation:

1. 2021 International Fire Code (IFC) – Section 2404.7.3 (Drying Operations in Spray Booths)

IFC 2404.7.3 mandates that spray booths must have interlocks to purge vapors for a minimum of 5 minutes before activating the drying process.

This ensures that flammable vapors are removed before heat sources operate, reducing fire risks.

2. NFPA 33 – Standard for Spray Application Using Flammable or Combustible Materials (2021 Edition) – Section 15.4.6

NFPA 33, Section 15.4.6 confirms the requirement for a 5-minute ventilation purge cycle before heat drying.

Detailed Explanation of Answer Choices:

Option A (Incorrect): 2 minutes is insufficient for adequate vapor removal.

Option B (Incorrect): 3 minutes does not meet the minimum safety requirement.

Option C (Incorrect): 4 minutes is slightly below the code-mandated requirement.

Option D (Correct): 5 minutes is the minimum required purge time per IFC 2404.7.3 and NFPA 33.

Thus, the correct and verified answer is: D. 5.

ï‚· Reference to Fire-Flow Requirements for Type IIB Buildings:

The International Fire Code (IFC 2021), Appendix B, Table B105.1(2) establishes the minimum fire-flow requirements for buildings based on construction type, size, and the presence of sprinkler systems.

For a 75,000 sq. ft. Type IIB (non-combustible, unprotected) building without sprinklers, the required fire-flow is 5,500 gpm for 4 hours.

ï‚· Why Fire-Flow Matters:

Fire-flow ensures that sufficient water is available to control and extinguish fires in large buildings.

Type IIB buildings lack built-in fire resistance enhancements, making adequate fire-flow crucial.

ï‚· Clarification of Incorrect Answer Choices:

A. 3,000 gpm for 3 hours → Incorrect

Too low for a building of this size and construction type.

B. 4,000 gpm for 4 hours → Incorrect

Below the required 5,500 gpm per IFC Appendix B.

D. 5,750 gpm for 4 hours → Incorrect

Slightly above the requirement but not the exact minimum mandated by IFC Table B105.1(2).

ï‚· Conclusion:

The correct and verified answer is C (5,500 gpm for 4 hours) as per IFC Appendix B, Table B105.1(2), ensuring compliance with fire-flow standards for Type IIB buildings without sprinklers.

Flammable Liquid Storage Limits in Control Areas

According to the International Fire Code (IFC) 2021, Section 5003.1.1 and Table 5003.1.1(1), the allowable quantity of flammable liquids stored in a control area can be doubled if the building is equipped with an automatic sprinkler system that complies with NFPA 13.

2. Why Automatic Sprinklers Allow Increased Storage

A sprinkler system significantly reduces fire risk by suppressing flames early, thus allowing greater quantities of hazardous materials to be safely stored.

IFC and NFPA 30 (Flammable and Combustible Liquids Code) specify that sprinkler-protected buildings can have up to twice the standard storage limits.

3. Verification of Other Options

Option A (permission is granted by the chief) – Incorrect, as storage limits are regulated by the fire code, not discretionary approval from the fire chief.

Option B (the control area exceeds 50,000 sq. ft.) – Incorrect, as floor area does not automatically allow for increased storage unless fire protection systems are in place.

Option D (the control area is provided with exhaust ventilation) – Incorrect, because ventilation is required for hazardous material control but does not impact storage limits like sprinklers do.

Reference Sources:

International Fire Code (IFC) 2021 – Section 5003.1.1 & Table 5003.1.1(1) (Control Area Storage Limits for Flammable Liquids)

NFPA 30: Flammable and Combustible Liquids Code (Sprinkler-Adjusted Storage Quantities)

ICC Fire Inspector II Study Guide (2021)

Thus, the correct and verified answer is: C. the building is protected with automatic sprinklers. ✅

ï‚· Reference to Occupant Load Factor Calculations:

The International Fire Code (IFC 2021), Table 1004.5 provides occupant load factors for different types of occupancies.

For assembly occupancy with tables and chairs, the occupant load factor is 15 square feet per person (net area).

ï‚· Calculation of Occupant Load:

Formula: Occupant Load=Net Square FootageOccupant Load Factor\text{Occupant Load} = \frac{\text{Net Square Footage}}{\text{Occupant Load Factor}}Occupant Load=Occupant Load FactorNet Square Footage​

Given: 2,500 net square feet, with a load factor of 15 sq. ft. per person: 250015=166.67≈167 occupants\frac{2500}{15} = 166.67 \approx 167 \text{ occupants}152500​=166.67≈167 occupants

ï‚· Clarification of Incorrect Answer Choices:

A. 167 → Correct

Matches the exact IFC Table 1004.5 calculation.

B. 227 → Incorrect

Would correspond to a lower load factor (about 11 sq. ft. per occupant), which is not the standard for tables and chairs.

C. 357 → Incorrect

Would correspond to a 7 sq. ft. per occupant factor, used for tighter seating arrangements (e.g., assembly without fixed seats).

D. 500 → Incorrect

Would correspond to a 5 sq. ft. per occupant factor, typically used for standing areas or dense seating arrangements.

ï‚· Conclusion:

The correct and verified answer is A (167 occupants) based on IFC Table 1004.5, using the standard occupant load factor for assembly occupancies with tables and chairs.

Clearance Requirement for Sprinkler Systems Over Flammable Liquid Storage

According to International Fire Code (IFC) 2021, Section 5004.6 and NFPA 30: Flammable and Combustible Liquids Code, Section 16.5.1, there must be a minimum of 18 inches of clearance between the top of flammable liquid storage and the deflector or discharge orifices of a sprinkler system.

This ensures unobstructed sprinkler discharge for effective fire suppression.

2. Why 18 Inches is the Correct Answer

The 18-inch clearance allows sprinklers to operate properly, ensuring water distribution is not blocked by stored materials.

NFPA 13 also mandates an 18-inch minimum clearance for standard storage applications with sprinklers.

3. Verification of Other Options

Option B (24 inches) – Incorrect, as the IFC and NFPA specify 18 inches as the minimum requirement.

Option C (30 inches) – Incorrect, as this exceeds the required minimum clearance.

Option D (36 inches) – Incorrect, as the IFC and NFPA do not require this much clearance.

Reference Sources:

International Fire Code (IFC) 2021 – Section 5004.6 (Sprinkler Clearance Over Flammable Liquid Storage)

NFPA 30: Flammable and Combustible Liquids Code – Section 16.5.1

NFPA 13: Standard for the Installation of Sprinkler Systems – Minimum Clearance Requirements

ICC Fire Inspector II Study Guide (2021)

Thus, the correct and verified answer is: A. 18 inches. ✅

Paint Spray Booth Clearance Requirements

According to the International Fire Code (IFC) 2021, Section 2404.3.2, paint spray booths must have a minimum clearance of 18 inches from unprotected combustible materials.

This clearance requirement helps prevent heat transfer, fire spread, and ignition of nearby combustible materials due to the operation of the spray booth.

2. Why 18 Inches is the Correct Answer

Spray booths generate overspray, vapors, and heat, making clearance essential for fire prevention.

The requirement applies to combustible walls, ceilings, and storage materials surrounding the spray booth.

If combustibles are within 18 inches, additional fire protection such as fire-rated barriers or sprinkler protection may be required.

3. Verification of Other Options

Option A (12 inches) – Incorrect, as the IFC mandates a minimum 18-inch clearance.

Option C (24 inches) – Exceeds the standard clearance requirement but is not the official minimum. Incorrect.

Option D (36 inches) – Some jurisdictions may require larger clearances, but IFC mandates 18 inches as the minimum. Incorrect.

Reference Sources:

International Fire Code (IFC) 2021 – Section 2404.3.2 (Paint Spray Booth Clearance Requirements)

NFPA 33: Standard for Spray Application Using Flammable or Combustible Materials (Clearance Guidelines)

ICC Fire Inspector II Study Guide (2021)

Thus, the correct and verified answer is: B. 18 inche

ï‚· Reference to Elevator Safety and Firefighter Use:

ASME A17.1 (Safety Code for Elevators and Escalators) establishes the safety requirements for elevators, including those designated for firefighter and emergency personnel use.

The International Fire Code (IFC) and NFPA 101 (Life Safety Code) both reference ASME A17.1 when addressing elevator safety and firefighter access.

ï‚· Firefighter Access and Operation Requirements:

ASME A17.1, Section 2.27 covers Firefighter Emergency Operations (FEO), which includes:

Phase I Operation (Automatic recall of elevators to a designated floor upon activation of fire alarms).

Phase II Operation (Manual override by firefighters for rescue and suppression operations).

IFC 607.1 (2021 Edition) mandates that fire service access elevators comply with ASME A17.1 for firefighter use in high-rise and multi-story buildings.

ï‚· Clarification of Incorrect Answer Choices:

A. UL 803 → Incorrect

UL 803 is not related to elevator fire safety; it pertains to electrical control panels for industrial applications.

B. NFPA 70 (National Electrical Code) → Incorrect

While NFPA 70 covers electrical wiring and circuits, it does not specifically regulate elevator emergency operations.

D. ASME A17.3 → Incorrect

ASME A17.3 is the Safety Code for Existing Elevators and Escalators, which applies to retrofits and upgrades, but ASME A17.1 is the primary code for operational and emergency use elevators.

ï‚· Conclusion:

The correct and verified answer is C (ASME A17.1) because it specifically outlines the requirements for firefighter and emergency personnel elevator use, ensuring compliance with the IFC and NFPA codes.

A fire code official has authority to enter buildings for fire safety inspections, but they must comply with legal entry requirements. The Fourth Amendment of the U.S. Constitution and fire codes restrict entry without permission, an administrative warrant, or legal authority.

Fire code officials do NOT have the right to enter vacant buildings at any time without proper authorization.

Reference to Fire Inspector Documentation:

1. 2021 International Fire Code (IFC) – Section 104.3 (Right of Entry)

IFC 104.3 states that a fire code official may only enter a building at reasonable times to conduct inspections, with consent or a legal warrant.

If entry is refused, the fire code official must obtain an administrative warrant before proceeding.

2. Fourth Amendment of the U.S. Constitution

Protects property owners from unlawful searches and seizures without proper legal authority.

Detailed Explanation of Answer Choices:

Option A (Correct): Fire code officials cannot enter vacant buildings at any time without permission or a warrant.

Option B (Incorrect): Fire code officials can enter a factory floor with permission from the owner/occupant.

Option C (Incorrect): Fire code officials can inspect public areas of malls during business hours since these spaces are open to the public.

Option D (Incorrect): Fire code officials can enter a warehouse’s interior with an administrative warrant, which is legally authorized for inspections.

Thus, the correct and verified answer is: A. Vacant buildings at any time.

For Group I-2 occupancies (such as hospitals, nursing homes, and similar healthcare facilities), horizontal exits are used to improve fire safety by allowing occupants to move to a safer area without using stairs or elevators.

IFC 2021, Section 1026.1 (Horizontal Exits – General Requirements) states that:

Horizontal exits shall not comprise more than one-half (1/2) of the required exits from any floor area in a Group I-2 occupancy.

This ensures that at least 50% of the required exits remain traditional vertical or exterior exits, maintaining a balance between horizontal and traditional egress routes.

✅ Correct Answer: B. 1/2

Refrigeration systems and units are regulated under IFC 2021, Section 605 – Refrigeration Equipment, and the requirement for emergency signs, charts, and labels is tied to the NFPA 704 Hazardous Materials Identification System.

IFC 2021, Section 605.12.3 – Signage for Refrigeration Systems:

States that approved emergency signs, charts, and labels must be provided when the refrigerant quantity exceeds 220 pounds for Group A1 refrigerants.

Definition of Group A1 Refrigerants (Low Toxicity, Low Flammability):

Examples include R-134a, R-410A, and R-22, which are commonly used in commercial and industrial HVAC systems.

Why Other Options Are Incorrect?

A. 30 lb. – Too low; labeling requirements do not apply at this threshold.

B. 100 lb. – Incorrect; the IFC requirement specifies 220 lb.

C. 200 lb. – Close, but still below the 220 lb. threshold.

To determine the occupant load of a 50,000 gross square foot airport terminal concourse, we use the occupant load factor from 2021 IBC Table 1004.5.

Step 1: Identify the Occupant Load Factor for an Airport Concourse

According to IBC Table 1004.5, the occupant load factor for an airport terminal concourse is 20 sq. ft. per person (gross).

Step 2: Calculate the Occupant Load

50,00020=2,500 occupants\frac{50,000}{20} = 2,500 \text{ occupants}2050,000​=2,500 occupants

Reference to Fire Inspector Documentation:

1. 2021 International Building Code (IBC) – Table 1004.5 (Occupant Load Factor for Airport Concourses)

20 sq. ft. per person is assigned for airport concourses.

2. 2021 International Fire Code (IFC) – Section 1004.1.2 (Occupant Load Determination)

Gross area calculations must follow the correct occupant load factor per IBC Table 1004.5.

Detailed Explanation of Answer Choices:

Option A (Incorrect): 200 is too low based on proper calculations.

Option B (Incorrect): 500 is also too low.

Option C (Incorrect): 1,000 is below the required calculation.

Option D (Correct): 2,500 is the correct calculation based on IBC Table 1004.5.

Thus, the correct and verified answer is: D. 2,500.

The storage of flammable liquids in control areas within an S Occupancy (Storage Occupancy) is governed by the 2021 International Fire Code (IFC), Section 5003 – Hazardous Materials, and Table 5003.1.1(1).

IFC Section 5003.1.1(1) – Maximum Allowable Quantity (MAQ) Adjustments:

The maximum allowable quantity (MAQ) of flammable liquids in a control area may be doubled if an approved automatic sprinkler system is installed throughout the building.

Why Other Options Are Incorrect?

A. Permission is granted by the chief.

Fire officials can enforce code requirements but do not have the authority to override MAQ limits unless explicitly allowed in the code.

B. The control area exceeds 50,000 sq. ft.

The code does not specify an increase based solely on size; the sprinkler system is the determining factor.

D. The control area is provided with exhaust ventilation in accordance with fire code requirements.

While ventilation is important for hazardous material safety, it does not allow for an increase in the maximum storage quantity.

✅ Correct Answer: C. The building is protected with automatic sprinklers.

Storage of fine magnesium scrap is regulated under 2021 IFC Chapter 59 – Magnesium and specifically IFC Section 5904.3.2.5 – Separation Distances for Magnesium Scrap Storage.

IFC 5904.3.2.5 – Minimum Separation Distances:

Fine magnesium scrap in quantities greater than 1,000 cubic feet must be separated from all buildings (except those used for magnesium scrap recovery) by at least 250 feet.

Why Other Options Are Incorrect?

A. 30 feet – Too close; insufficient for high-risk metal fires.

B. 50 feet – Does not meet the minimum required separation for magnesium scrap.

C. 100 feet – While larger, it still does not meet the 250-ft. requirement

Smoking Restrictions Near LP-Gas Transfer Points

According to the International Fire Code (IFC) 2021, Section 3807.2, smoking is not permitted within 25 feet of an LP-gas transfer point while filling operations are in progress.

This prevents ignition hazards, as LP-gas is highly flammable and can ignite from cigarettes, matches, or lighters.

2. Why 25 Feet is the Correct Answer

LP-gas vapors are heavier than air and can travel significant distances before igniting.

The 25-foot clearance requirement is set to prevent accidental ignition due to an undetected vapor leak.

3. Verification of Other Options

Option A (10 feet) – Incorrect, as this is the requirement for smaller propane cylinder storage areas, not transfer points.

Option B (15 feet) – Incorrect, as IFC mandates a 25-foot minimum clearance.

Option D (50 feet) – Incorrect, as the IFC requirement is specifically 25 feet, not 50.

Reference Sources:

International Fire Code (IFC) 2021 – Section 3807.2 (Smoking Prohibitions Near LP-Gas Transfer Points)

NFPA 58: Liquefied Petroleum Gas Code (Safe Handling and Transfer Requirements)

ICC Fire Inspector II Study Guide (2021)

Thus, the correct and verified answer is: C. 25 feet. ✅

ï‚· Reference to ICC Fire Code and Legal Authority:

The International Fire Code (IFC) and Standard Inspection Procedures establish that fire inspectors must either obtain consent from the occupant or acquire an inspection warrant if entry is denied.

IFC Section 104.3 (Right of Entry) states that inspectors have the authority to enter a building at reasonable times to conduct an inspection, but if entry is refused, a warrant must be obtained.

ï‚· Legal and Ethical Considerations:

Fourth Amendment Rights protect against unlawful searches, requiring inspectors to either:

Gain voluntary consent from the occupant, OR

Obtain an inspection warrant if the occupant refuses entry.

Prior notice is not always required, but if the occupant is unavailable or uncooperative, legal measures must be taken.

ï‚· Clarification of Incorrect Answer Choices:

A. must give prior notice to the occupant → Incorrect

While prior notice is sometimes given as a courtesy, it is not legally required for routine inspections unless mandated by local ordinances.

B. need not give prior notice of the inspection to the occupant → Incorrect

While prior notice may not be required, entry still requires consent or a warrant. This answer does not fully address the legal requirement for an inspection warrant if entry is denied.

C. must provide the occupant with at least 24 hours of advance notice → Incorrect

No universal 24-hour notice rule exists under the IFC unless specified by local regulations.

ï‚· Conclusion:

The correct and verified answer is D because fire inspectors must either give prior notice to the occupant or obtain an inspection warrant if entry is refused (IFC Section 104.3).

IFC Section 2303.7 classifies ABS (acrylonitrile butadiene styrene) plastics as Group A (high-hazard) due to their flammability and smoke production, per NFPA 13. Options B and C are less hazardous, D is a commodity class, not a plastic group. Thus, A is correct.

The maximum travel distance allowed in a one-story Group F-2 (Factory Industrial - Low Hazard) occupancy with automatic sprinklers and automatic smoke and heat vents is regulated by 2021 International Fire Code (IFC) Table 1017.2 – Exit Access Travel Distance.

IFC Table 1017.2 – Maximum Travel Distance:

For a Group F-2 occupancy equipped with an automatic sprinkler system, the maximum allowable exit access travel distance is 400 feet.

However, when automatic smoke and heat vents are installed, the travel distance is limited to 350 feet.

This is because while the sprinklers control fire spread, smoke and heat vents help with smoke control, allowing for extended egress distances but not as much as without them.

Why Other Options Are Incorrect?

A. 250 ft. – Too restrictive; the IFC allows a longer travel distance in this scenario.

B. 300 ft. – Less than the allowed 350 ft.

D. 400 ft. – Only applicable without smoke and heat vents.

A container in a clean-agent extinguishing system must be refilled or replaced if it experiences a loss of more than 5% of its original weight or a loss in original pressure of more than 3%. This requirement ensures the system maintains sufficient agent concentration for fire suppression.

Reference to Fire Inspector Documentation:

1. NFPA 2001 – Standard on Clean Agent Fire Extinguishing Systems (2022 Edition)

NFPA 2001, Section 7.3.2.1 states that a container must be refilled or replaced if the weight loss exceeds 5% or the pressure loss exceeds 3% from the original fill pressure.

These limits are set to maintain system effectiveness and ensure that a clean-agent system can properly discharge in case of a fire.

2. 2021 International Fire Code (IFC) – Chapter 9 (Fire Protection Systems)

IFC 904.10 requires that clean-agent systems be maintained per NFPA 2001 to ensure reliability.

Detailed Explanation of Answer Choices:

Option A (Correct): 3% pressure loss is the correct threshold beyond which a container must be replaced or refilled.

Option B (Incorrect): While 5% is correct for weight loss, it is not the correct value for pressure loss.

Option C (Incorrect): A 10% pressure loss is too high and would compromise system performance before reaching the replacement threshold.

Option D (Incorrect): 12% is well beyond the acceptable loss limit and would pose a significant safety risk.

Thus, the correct and verified answer is: A. 3