Practice Examination Questions And

FDNY C-15 Flame-Retardant Treatment Practice Examination Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of flame-retardant treatment under the C-

15 Certificate of Fitness?

• Improve fabric durability
• Reduce flame spread characteristics
• Increase fabric colorfastness
• Prevent all combustion

Rationale: Flame-retardant treatment is mandated to limit flame spread

and reduce fire hazards in treated materials.

• A Certificate of Fitness holder may perform flame-retardant treatment

on which of the following materials? 1 / 4

• Metal panels
• Concrete board
• Fabrics, decorations, scenery, and similar combustible materials
• Fire-rated gypsum board

Rationale: The C-15 covers treatment of combustible decorative materials

susceptible to flame spread.

• What NYC agency issues the C-15 Certificate of Fitness?

A. NYPD

B. OEM

C. FDNY

D. DOB

Rationale: All Certificates of Fitness for fire-related duties are issued by

FDNY.

4. Certificates of Fitness must be:

• Left in a company vehicle
• Sent to headquarters weekly
• Readily available for inspection during operations
• Posted on social media 2 / 4

Rationale: FDNY requires the certificate to be accessible anytime work is

being performed.

• How long is a C-15 Certificate of Fitness typically valid?
• 1 year
• 3 years
• 5 years
• 10 years

Rationale: Most FDNY Certificates of Fitness, including the C-15, have a

standard 3-year validity.

• Flame-retardant treatments must comply with which standard?

A. ASTM E814

B. UL 217

C. NFPA 701

D. NFPA 72

Rationale: NFPA 701 outlines acceptable flame-propagation performance

for treated materials.

• When applying flame-retardant chemicals, the C-15 holder must ensure: 3 / 4

• The treated area is air-conditioned
• Adequate ventilation is maintained
• All doors remain closed
• The public is present

Rationale: Proper ventilation ensures safe dispersion of vapors and

prevents chemical overexposure.

8. Treated materials must be re-treated:

• Monthly
• Whenever laundering, cleaning, or wear reduces effectiveness
• Only every five years
• Only after FDNY inspection

Rationale: Flame-retardant effectiveness diminishes with cleaning or

deterioration.

• What documentation must be issued after treatment?
• Medical clearance
• Plumbing permit
• Certificate of Flame-Retardant Treatment
• Insurance policy
• / 4