Practice Exam Questions And Correct Answers

FDNY B-28 Certificate of Fitness Supervision of Stationary Energy Storage Systems (ESS) Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary FDNY rule that governs stationary energy storage

systems in New York City?

• Rule 3 RCNY 401
• Rule 3 RCNY 404
• Rule 3 RCNY 608
• Rule 3 RCNY 510

Rationale: 3 RCNY 608 provides requirements for installation, operation,

and supervision of ESS in NYC.

• Which certificate of fitness authorizes supervision of stationary ESS

installations?

A. S-95

B. S-98 1 / 4

C. R-02

D. B-28

Rationale: The B-28 is specifically created for ESS supervision.

• Which of the following best describes an ESS?
• System designed to provide HVAC support
• System that stores energy for later use
• System intended only for fire suppression
• System for high-voltage transmission

Rationale: ESS store electrical energy for later discharge.

• Which standard evaluates fire propagation hazards of battery systems?

A. UL 9540

B. UL 9540A

C. UL 1778

D. UL 486A

Rationale: UL 9540A assesses thermal runaway and fire propagation.

• Which document is required on-site for FDNY inspection?
• Tenant lease agreement
• Employee contact list only
• Approved FDNY permit and design documents
• Insurance policy

Rationale: FDNY inspectors verify permits and approved plans are present. 2 / 4

• For most outdoor ESS > 600 kWh, which fire protection feature is

required?

• No fire protection is required
• Only manual extinguishers
• Fire detection and remote monitoring
• Gas suppression only

Rationale: Large-scale ESS require automatic detection and monitoring.

• What is the major hazard of lithium-ion ESS?
• Overcooling
• Electrical impedance
• Thermal runaway
• Dust accumulation

Rationale: Lithium-ion cells risk cascading thermal runaway when

overheated.

• What must be done if the BMS indicates a critical fault?
• Tape over warning indicators
• Ignore temporary alarms
• Follow emergency shutdown procedures
• Continue normal operation

Rationale: Critical BMS faults require immediate safe shutdown.

• What is required for ESS installations exceeding threshold quantities in

NYC? 3 / 4

• Routine exemption
• Self-certification
• FDNY permit
• Verbal notification

Rationale: FDNY permitting applies above certain capacities.

10. Acceptable extinguishers for lithium-ion fires include:

• Class A only
• Class C extinguishers
• Water extinguishers only
• Foam only

Rationale: Class C is appropriate for energized electrical equipment.

• Who is authorized to supervise an ESS in NYC?
• Any employee
• The janitorial staff
• A B-28 Certificate of Fitness holder
• Delivery personnel

Rationale: Only B-28 C of F holders may supervise ESS.

• What is the function of the BMS?
• HVAC only
• Radio communication
• Monitoring and controlling battery conditions
• / 4