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FDNY S-11 Certificate of Fitness — Residential
Sprinkler System Supervisor Exam | Latest Verified
Questions and Detailed Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple choice questions is designed for the FDNY S-11
Certificate of Fitness — Residential Sprinkler System Supervisor Exam, a computer-based
test administered at FDNY Headquarters. The exam assesses knowledge required to
supervise the inspection, testing, and maintenance of limited-area wet-pipe residential
sprinkler systems and compactor sprinkler systems in R-2 occupancies up to six stories.
Key content areas include system components and operation, sprinkler head temperature
ratings and clearance requirements, water supply integration, scheduled inspection and
testing frequencies, out-of-service and impairment protocols, record keeping in approved
logbooks, and the legal responsibilities of the building owner.
QUESTION 1
Which type of sprinkler system is most commonly required for the R-2 limited-area
applications covered by the S-11 Certificate of Fitness?
A) Dry-pipe system
B) Pre-action system
C) Wet-pipe system
D) Deluge system
CORRECT ANSWER: C
EXPERT RATIONALE: Residential limited-area systems are almost always wet-pipe,
keeping water constantly at the sprinkler heads for immediate discharge upon heat
activation.
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QUESTION 2
What is the maximum number of sprinkler heads permitted in an R-2 limited-area
sprinkler system supervised under an S-11 COF?
A) 20
B) 30
C) 50
D) 100
CORRECT ANSWER: B
EXPERT RATIONALE: The S-11 certificate is issued for residential systems protecting up
to 30 sprinkler heads or a compactor sprinkler system.
QUESTION 3
A dedicated sprinkler system protecting a trash compactor in an R-2 occupancy up to 6
stories high falls under which COF?
A) S-12
B) S-15
C) S-11
D) S-95
CORRECT ANSWER: C
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EXPERT RATIONALE: S-11 covers both limited-area residential sprinkler systems (≤30
heads) and compactor sprinkler systems in eligible R-2 buildings.
QUESTION 4
The glass bulb of a residential sprinkler head that activates at 155°F is what color?
A) Orange
B) Red
C) Yellow
D) Green
CORRECT ANSWER: B
EXPERT RATIONALE: Standard color coding: red bulbs are rated for 155°F, while orange
is 135°F, yellow 175°F, and green 200°F.
QUESTION 5
An orange glass bulb in a residential sprinkler head indicates an activation temperature
of:
A) 135°F
B) 155°F
C) 175°F
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D) 200°F
CORRECT ANSWER: A
EXPERT RATIONALE: Orange corresponds to an ordinary temperature rating of 135°F,
one of the lower standard activation points.
QUESTION 6
What is the minimum clearance that must be maintained between the deflector of a
residential sprinkler and the top of storage or furniture?
A) 12 inches
B) 18 inches
C) 24 inches
D) 36 inches
CORRECT ANSWER: B
EXPERT RATIONALE: NFPA 13D requires an 18-inch vertical clearance below the sprinkler
deflector to allow proper spray pattern development and avoid obstruction.
QUESTION 7
Which component of a wet-pipe residential sprinkler system is specifically designed to
initiate an alarm when water flows through the system?
FDNY S-11 Certificate of Fitness — Residential
Sprinkler System Supervisor Exam | Latest Verified
Questions and Detailed Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple choice questions is designed for the FDNY S-11
Certificate of Fitness — Residential Sprinkler System Supervisor Exam, a computer-based
test administered at FDNY Headquarters. The exam assesses knowledge required to
supervise the inspection, testing, and maintenance of limited-area wet-pipe residential
sprinkler systems and compactor sprinkler systems in R-2 occupancies up to six stories.
Key content areas include system components and operation, sprinkler head temperature
ratings and clearance requirements, water supply integration, scheduled inspection and
testing frequencies, out-of-service and impairment protocols, record keeping in approved
logbooks, and the legal responsibilities of the building owner.
QUESTION 1
Which type of sprinkler system is most commonly required for the R-2 limited-area
applications covered by the S-11 Certificate of Fitness?
A) Dry-pipe system
B) Pre-action system
C) Wet-pipe system
D) Deluge system
CORRECT ANSWER: C
EXPERT RATIONALE: Residential limited-area systems are almost always wet-pipe,
keeping water constantly at the sprinkler heads for immediate discharge upon heat
activation.
,2|Page
QUESTION 2
What is the maximum number of sprinkler heads permitted in an R-2 limited-area
sprinkler system supervised under an S-11 COF?
A) 20
B) 30
C) 50
D) 100
CORRECT ANSWER: B
EXPERT RATIONALE: The S-11 certificate is issued for residential systems protecting up
to 30 sprinkler heads or a compactor sprinkler system.
QUESTION 3
A dedicated sprinkler system protecting a trash compactor in an R-2 occupancy up to 6
stories high falls under which COF?
A) S-12
B) S-15
C) S-11
D) S-95
CORRECT ANSWER: C
,3|Page
EXPERT RATIONALE: S-11 covers both limited-area residential sprinkler systems (≤30
heads) and compactor sprinkler systems in eligible R-2 buildings.
QUESTION 4
The glass bulb of a residential sprinkler head that activates at 155°F is what color?
A) Orange
B) Red
C) Yellow
D) Green
CORRECT ANSWER: B
EXPERT RATIONALE: Standard color coding: red bulbs are rated for 155°F, while orange
is 135°F, yellow 175°F, and green 200°F.
QUESTION 5
An orange glass bulb in a residential sprinkler head indicates an activation temperature
of:
A) 135°F
B) 155°F
C) 175°F
, 4|Page
D) 200°F
CORRECT ANSWER: A
EXPERT RATIONALE: Orange corresponds to an ordinary temperature rating of 135°F,
one of the lower standard activation points.
QUESTION 6
What is the minimum clearance that must be maintained between the deflector of a
residential sprinkler and the top of storage or furniture?
A) 12 inches
B) 18 inches
C) 24 inches
D) 36 inches
CORRECT ANSWER: B
EXPERT RATIONALE: NFPA 13D requires an 18-inch vertical clearance below the sprinkler
deflector to allow proper spray pattern development and avoid obstruction.
QUESTION 7
Which component of a wet-pipe residential sprinkler system is specifically designed to
initiate an alarm when water flows through the system?
