Exam Questions And Correct Answers

FDNY S15 – Supervision of Foam-Water Sprinkler Systems (Citywide) Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of a foam-water sprinkler system?
• Provide cooling only
• Provide water mist suppression
• Control flammable-liquid fires using foam solution
• Remove oxygen from all types of fires

Rationale: Foam-water systems are designed for Class B fire hazards where

foam blankets and suppresses flammable-liquid vapors.

• Foam concentrate is typically mixed with water to form: 1 / 4

• Aqueous suppressant powder
• Foam solution
• Dry chemical agent
• Halocarbon mixture

Rationale: The first mixture created is the foam solution before aeration

forms finished foam.

• Which pipe color coding commonly indicates foam concentrate lines?
• Blue
• Green
• Yellow
• Orange

Rationale: Industry practice uses yellow for foam concentrate to

differentiate from normal water piping.

• Which NFPA standard applies to foam-water sprinkler systems?

A. NFPA 10

B. NFPA 12

C. NFPA 16

D. NFPA 24

Rationale: NFPA 16 governs the installation of foam-water sprinkler and

foam-water spray systems. 2 / 4

5. A proportioner’s function is to:

• Agitate finished foam
• Introduce foam concentrate into the water stream at a set ratio
• Remove air from piping
• Provide secondary power

Rationale: The proportioner meters concentrate into the water to create

foam solution.

• Which hazard class most commonly requires foam-water systems?
• Class A solids
• Class B flammable liquids
• Class C energized equipment
• Class K cooking oils

Rationale: Foam suppresses vapor release from flammable-liquid fuels.

7. A bladder tank uses:

• Compressed air to inject concentrate
• Water pressure to force concentrate from a bladder
• Manual pumping
• Mechanical refrigeration 3 / 4

Rationale: System water pressure squeezes the internal bladder to

discharge concentrate.

• Which of the following is a fixed foam-water discharge device?
• Fog nozzle
• Foam-water sprinkler head
• Portable aerator
• Handline eductor

Rationale: Foam-water sprinklers are permanently installed discharge

devices.

9. The minimum supervisor requirement for S-15 is:

• On-site technical engineer
• Master electrician
• Fire and life safety certificate holder
• Licensed plumber

Rationale: FDNY requires a certificate holder to supervise foam-water

systems.

• An S-15 certificate holder must inspect the system:
• / 4