S12 FDNY FINAL EXAM (LATEST
2026/2027) QUESTIONS AND ANSWERS
1. Which NFPA standard is primarily used for the inspection, testing, and maintenance of
water-based fire protection systems?
A. NFPA 13
B. NFPA 101
C. NFPA 72
D. NFPA 25
Answer: D
Conceptual Explanation: NFPA 25 is the standard for the inspection, testing, and
maintenance of water-based fire protection systems, which is the basis for the S-12
Certificate of Fitness.
2. A pressure tank must be maintained at what ratio of water to air?
A. 1/3 water and 2/3 air
B. 1/2 water and 1/2 air
C. 2/3 water and 1/3 air
,D. 3/4 water and 1/4 air
Answer: C
Conceptual Explanation: A pressure tank should generally be kept two-thirds full of water
and one-third full of pressurized air to provide the necessary force to move the water.
3. What color should the Siamese connection be for a non-automatic sprinkler system?
A. Green
B. Red
C. Silver
D. Yellow
Answer: C
Conceptual Explanation: In New York City, Siamese connections for non-automatic
sprinkler systems must be painted silver.
4. At what temperature must a gravity tank be maintained to prevent freezing?
A. 40 degrees F
B. 32 degrees F
C. 50 degrees F
D. 60 degrees F
Answer: A
, Conceptual Explanation: Water in gravity tanks must be maintained at a minimum of 40
degrees Fahrenheit to prevent the water from freezing.
5. How often must a main drain test be conducted on a sprinkler system?
A. Quarterly
B. Monthly
C. Weekly
D. Annually
Answer: A
Conceptual Explanation: A main drain test is required quarterly to ensure there is no
obstruction in the water supply piping.
6. Which type of valve is used to prevent the backflow of water from the sprinkler system
into the city water main?
A. Check Valve
B. OS&Y Valve
C. Butterfly Valve
D. Post Indicator Valve
Answer: A
Conceptual Explanation: Check valves allow water to flow in only one direction,
preventing backflow into the source.
2026/2027) QUESTIONS AND ANSWERS
1. Which NFPA standard is primarily used for the inspection, testing, and maintenance of
water-based fire protection systems?
A. NFPA 13
B. NFPA 101
C. NFPA 72
D. NFPA 25
Answer: D
Conceptual Explanation: NFPA 25 is the standard for the inspection, testing, and
maintenance of water-based fire protection systems, which is the basis for the S-12
Certificate of Fitness.
2. A pressure tank must be maintained at what ratio of water to air?
A. 1/3 water and 2/3 air
B. 1/2 water and 1/2 air
C. 2/3 water and 1/3 air
,D. 3/4 water and 1/4 air
Answer: C
Conceptual Explanation: A pressure tank should generally be kept two-thirds full of water
and one-third full of pressurized air to provide the necessary force to move the water.
3. What color should the Siamese connection be for a non-automatic sprinkler system?
A. Green
B. Red
C. Silver
D. Yellow
Answer: C
Conceptual Explanation: In New York City, Siamese connections for non-automatic
sprinkler systems must be painted silver.
4. At what temperature must a gravity tank be maintained to prevent freezing?
A. 40 degrees F
B. 32 degrees F
C. 50 degrees F
D. 60 degrees F
Answer: A
, Conceptual Explanation: Water in gravity tanks must be maintained at a minimum of 40
degrees Fahrenheit to prevent the water from freezing.
5. How often must a main drain test be conducted on a sprinkler system?
A. Quarterly
B. Monthly
C. Weekly
D. Annually
Answer: A
Conceptual Explanation: A main drain test is required quarterly to ensure there is no
obstruction in the water supply piping.
6. Which type of valve is used to prevent the backflow of water from the sprinkler system
into the city water main?
A. Check Valve
B. OS&Y Valve
C. Butterfly Valve
D. Post Indicator Valve
Answer: A
Conceptual Explanation: Check valves allow water to flow in only one direction,
preventing backflow into the source.
