Examination Questions And Correct

FDNY C-30: Supervision of Flammable /

Combined Finishing Operations Practice Examination Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary FDNY permit required for spray-painting

operations using flammable liquids?

• FDNY Spray Booth Permit
• LPG Storage Permit
• Place of Assembly Permit
• Fumigation Permit

Rationale: Spray operations producing vapors require a dedicated

spray finishing permit per Fire Code.

• Minimum flash point that classifies a liquid as “flammable” under

FDNY rules?

A. 200°F

B. 141°F 1 / 4

• 100°F or less

D. 500°F

Rationale: Flammable liquids have flash points ≤ 100°F; above 100°F

is combustible.

• Spray booths must maintain a minimum air velocity at the face of the

booth of:

• 25 ft/min
• 50 ft/min
• 100 ft/min
• 300 ft/min

Rationale: NFPA 33 and FDNY standards call for 100 ft/min capture

velocity.

• What type of wiring must be used inside spray areas?
• NM cable
• Explosion-proof electrical wiring
• Armored cable
• Any residential grade

Rationale: Flammable vapors require Class I, Div 1 electrical

equipment.

• Maximum allowable thickness of overspray residue before cleaning?
• 1/16 inch
• 1/8 inch
• 1 inch 2 / 4

• 2 inches

Rationale: NFPA 33 mandates cleaning at 1/8 inch accumulation.

• Spray booth filters must be replaced when?
• Once per year
• When color changes
• When air flow decreases / clogging occurs
• Monthly only

Rationale: Filtration must maintain required airflow; replacement is

performance-based.

• How often must portable fire extinguishers in spray areas be inspected

visually?

• Monthly
• Weekly
• Quarterly
• Annually

Rationale: FDNY and NFPA 10 require monthly visual checks.

• Minimum required rating for extinguishers in spray areas?
• 1A
• 2A

C. 4A:40-B:C

• K class only

Rationale: Finishing operations require multipurpose units with

adequate flammable-liquid capability. 3 / 4

• What type of ventilation is required for dipping operations?
• Recirculated HVAC
• Mechanical exhaust ventilation
• Ceiling fans only
• Natural ventilation

Rationale: Vapors from dip tanks require mechanical exhaust for

hazard control.

• Dip tanks using flammable liquids must be equipped with what

emergency feature?

• Heat lamps
• Automatic covers
• Hose bibbs
• Insulation

Rationale: Covers prevent vapor release and suppress fire spread.

11. Electrical bonding/grounding is required to prevent:

• Rusting
• Corrosion
• Static discharge
• Moisture accumulation

Rationale: Static sparks can ignite vapors; grounding prevents

buildup.

12. Combustible waste from finishing ops must be removed at least:

• Weekly
• / 4