Examination Questions And Correct

FDNY B-29: Supervision of Battery Systems

and Other Related Equipment Practice Examination Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

1.Which type of battery is most commonly associated with thermal runaway hazards in stationary energy storage systems?

• Flooded lead-acid
• Lithium-ion
• Nickel-cadmium
• Zinc-air

Lithium-ion cells can enter thermal runaway due to exothermic reactions when damaged, overcharged, or overheated.

2. 1 / 4

What is the primary function of ventilation in battery system rooms?

• Reduce noise from inverters
• Prevent accumulation of flammable or toxic gases
• Keep equipment clean
• Provide comfort cooling

Proper ventilation disperses gases such as hydrogen and maintains safe atmospheres.

3.FDNY-approved battery systems must include which safety component?

• Decorative enclosure panels
• Fire-resistive floor tiles
• Integrated Battery Management System (BMS)
• Backup diesel generator

A BMS monitors temperature, voltage, SOC, and fault conditions to ensure safe operation.

4.

In a lithium-ion system, the BMS will typically shut the system down if:

• Voltage is nominal
• Ambient temperature is mild
• Cell temperature rises beyond safe limits
• The fire alarm panel is offline

Overtemperature is a critical condition that triggers automatic protective shutdown. 2 / 4

5.Hydrogen gas is most associated with which battery type?

• Lithium iron phosphate
• Lead-acid types
• Zinc-bromine flow
• Sodium-ion cells

Lead-acid batteries produce hydrogen during charging, requiring ventilation.

6.What is the minimum required portable fire extinguisher rating in battery rooms under FDNY guidelines?

A. 1-A

B. 3-A

C. 4-A:40-B:C

• 10-B only

A 4-A:40-B:C extinguisher provides capability for ordinary combustibles and electrical fires.

7.Which condition requires immediate shutdown and notification to FDNY?

• Low ambient humidity
• End-of-life battery warning
• Evidence of smoke or off-gassing from cells 3 / 4

• Routine cycling of batteries

Smoke or gas release indicates imminent hazard and demands emergency action.

8.What is the primary hazard of off-gassing from lithium-ion batteries?

• Frozen electrolyte
• Flammable and toxic vapors
• Harmless water vapor
• Nitrogen release

Vapors can ignite or be harmful if inhaled.

9.Which signage must be posted at battery system rooms?

• Company logo
• FDNY-approved hazard identification signs
• Occupant load
• Smoking area signs

Compliance signage informs responders of stored energy hazards.

10.

Emergency ventilation override switches must be located:

• Inside locked cabinets
• Outside the battery room and readily accessible
• On the roof
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