S12 FDNY Exam (Latest
Update) Questions and Verified
Answers | 100% Correct | Grade A
Questions 1–50: FDNY S12 Certificate of Fitness for
Citywide Sprinkler Systems
Sprinkler System Components
1. What is the purpose of a fire department connection (FDC)?
A. Controls water flow to sprinklers
B. Supplies supplemental water to the sprinkler system
C. Drains the sprinkler system
D. Monitors air pressure
Answer: Supplies supplemental water to the sprinkler system
Rationale: The FDC allows FDNY to pump supplemental water into the sprinkler or
standpipe system to enhance fire suppression.
2. Where is the automatic ball drip located?
A. At the main control valve
B. Between the lower check valve and fire department connection
C. At the sprinkler head
D. In the gravity tank
Answer: Between the lower check valve and fire department connection
Rationale: The automatic ball drip is installed at the low point between the lower check
valve and FDC to drain water and prevent freezing.
3. What is the purpose of a ball drip?
A. To increase water pressure
B. To prevent freezing in the line
C. To activate the sprinkler system
D. To measure water flow
Answer: To prevent freezing in the line
Rationale: The ball drip automatically drains water from the FDC piping to prevent
freezing in cold conditions.
, 4. What is the minimum air pressure inside a pressure tank?
A. 50 psi
B. 75 psi
C. 100 psi
D. 125 psi
Answer: 75 psi
Rationale: A minimum of 75 psi ensures adequate pressure for sprinkler system
operation.
5. A sprinkler system with open heads is called a:
A. Wet pipe system
B. Dry pipe system
C. Deluge system
D. Preaction system
Answer: Deluge system
Rationale: Deluge systems have open sprinkler heads, allowing water to flow
immediately when activated, typically for high-hazard areas.
Inspection and Maintenance
6. How often are steel water storage tanks without corrosive protection inspected?
A. Annually
B. Every 3 years
C. Every 5 years
D. Every 10 years
Answer: Every 3 years
Rationale: Steel tanks without corrosion protection require inspection every 3 years to
ensure integrity.
7. How often should gauges be replaced?
A. Every 2 years
B. Every 5 years
C. Every 7 years
D. Every 10 years
Answer: Every 5 years
Rationale: Gauges must be replaced or recalibrated every 5 years to ensure accuracy.
8. How often is the stem of an OS&Y valve lubricated?
A. Monthly
B. Quarterly
C. Annually
D. Every 2 years
Update) Questions and Verified
Answers | 100% Correct | Grade A
Questions 1–50: FDNY S12 Certificate of Fitness for
Citywide Sprinkler Systems
Sprinkler System Components
1. What is the purpose of a fire department connection (FDC)?
A. Controls water flow to sprinklers
B. Supplies supplemental water to the sprinkler system
C. Drains the sprinkler system
D. Monitors air pressure
Answer: Supplies supplemental water to the sprinkler system
Rationale: The FDC allows FDNY to pump supplemental water into the sprinkler or
standpipe system to enhance fire suppression.
2. Where is the automatic ball drip located?
A. At the main control valve
B. Between the lower check valve and fire department connection
C. At the sprinkler head
D. In the gravity tank
Answer: Between the lower check valve and fire department connection
Rationale: The automatic ball drip is installed at the low point between the lower check
valve and FDC to drain water and prevent freezing.
3. What is the purpose of a ball drip?
A. To increase water pressure
B. To prevent freezing in the line
C. To activate the sprinkler system
D. To measure water flow
Answer: To prevent freezing in the line
Rationale: The ball drip automatically drains water from the FDC piping to prevent
freezing in cold conditions.
, 4. What is the minimum air pressure inside a pressure tank?
A. 50 psi
B. 75 psi
C. 100 psi
D. 125 psi
Answer: 75 psi
Rationale: A minimum of 75 psi ensures adequate pressure for sprinkler system
operation.
5. A sprinkler system with open heads is called a:
A. Wet pipe system
B. Dry pipe system
C. Deluge system
D. Preaction system
Answer: Deluge system
Rationale: Deluge systems have open sprinkler heads, allowing water to flow
immediately when activated, typically for high-hazard areas.
Inspection and Maintenance
6. How often are steel water storage tanks without corrosive protection inspected?
A. Annually
B. Every 3 years
C. Every 5 years
D. Every 10 years
Answer: Every 3 years
Rationale: Steel tanks without corrosion protection require inspection every 3 years to
ensure integrity.
7. How often should gauges be replaced?
A. Every 2 years
B. Every 5 years
C. Every 7 years
D. Every 10 years
Answer: Every 5 years
Rationale: Gauges must be replaced or recalibrated every 5 years to ensure accuracy.
8. How often is the stem of an OS&Y valve lubricated?
A. Monthly
B. Quarterly
C. Annually
D. Every 2 years
