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NYC (DOB) Master Fire Suppression Piping Contractor
(Class C) Exam | Latest Verified Questions and Detailed
Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple-choice questions is designed for the NYC Master Fire
Suppression Piping Contractor (Class C) Exam, a closed-book test administered by the NYC
Department of Buildings. The exam assesses knowledge of public safety protocols, NYC
construction codes (with emphasis on Chapter 9 and relevant Plumbing Code sections),
and key NFPA standards such as NFPA 13, NFPA 14, and NFPA 20. Candidates must
demonstrate proficiency in hydraulic calculations, water supply requirements, fire pump
and alarm operations, and the testing, inspection, and maintenance procedures for wet-
pipe, dry-pipe, pre-action, and standpipe systems.
QUESTION 1
Which NYC Construction Code chapter governs the installation of fire protection
systems?
A. Chapter 7
B. Chapter 9
C. Chapter 11
D. Chapter 33
CORRECT ANSWER: B. Chapter 9
EXPERT RATIONALE: NYC Building Code Chapter 9 specifically regulates fire protection
systems, including automatic sprinklers and standpipes. Chapter 33 addresses
safeguards during construction, not system design.
QUESTION 2
According to NFPA 13, the minimum design area for the most remote 5 sprinklers in a
Light Hazard occupancy is how many square feet?
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A. 900
B. 1,500
C. 2,000
D. 1,000
CORRECT ANSWER: B. 1,500
EXPERT RATIONALE: NFPA 13 design area for Light Hazard is 1500 sq ft for hydraulic
calculations. The number of sprinklers in the design area varies, but the area itself is
specified.
QUESTION 3
What is the maximum spacing allowed between sprinklers in a Light Hazard occupancy
under NFPA 13?
A. 12 ft
B. 15 ft
C. 20 ft
D. 10 ft
CORRECT ANSWER: B. 15 ft
EXPERT RATIONALE: NFPA 13 permits a maximum spacing of 15 feet for standard spray
sprinklers in Light Hazard, protecting up to 225 sq ft per sprinkler.
QUESTION 4
A Class I standpipe system requires a minimum flow rate of how many gallons per
minute at the most remote hose connection?
A. 250 gpm
B. 500 gpm
C. 750 gpm
D. 1,000 gpm
CORRECT ANSWER: B. 500 gpm
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EXPERT RATIONALE: NFPA 14 requires Class I standpipes to provide 500 gpm for the
first standpipe plus 250 gpm for each additional standpipe, total not exceeding 1250
gpm.
QUESTION 5
Per NYC Building Code, what is the minimum size of a fire department connection (FDC)
pipe for a sprinkler system?
A. 4 inches
B. 5 inches
C. 6 inches
D. 8 inches
CORRECT ANSWER: C. 6 inches
EXPERT RATIONALE: NYC amendments require a minimum 6-inch pipe from the FDC to
the system riser. NFPA 13 may permit 4-inch, but NYC mandates 6-inch.
QUESTION 6
Which NFPA standard governs the installation of stationary fire pumps?
A. NFPA 13
B. NFPA 14
C. NFPA 20
D. NFPA 25
CORRECT ANSWER: C. NFPA 20
EXPERT RATIONALE: NFPA 20 is the standard for centrifugal fire pump installation. NFPA
25 covers inspection, testing, and maintenance.
QUESTION 7
In a wet-pipe sprinkler system, what is the primary purpose of the alarm check valve?
A. Prevent backflow
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B. Activate a water motor gong
C. Maintain system pressure and initiate alarm
D. Drain the system
CORRECT ANSWER: C. Maintain system pressure and initiate alarm
EXPERT RATIONALE: The alarm check valve keeps the system pressurized, prevents
water from returning to the supply, and triggers a local alarm when water flows.
QUESTION 8
According to NFPA 14, what is the maximum pressure allowed at any hose outlet in a
standpipe system under flow conditions?
A. 80 psi
B. 100 psi
C. 125 psi
D. 175 psi
CORRECT ANSWER: B. 100 psi
EXPERT RATIONALE: NFPA 14 limits outlet pressure to 100 psi to prevent excessive
nozzle reaction. Pressure-regulating devices may be required.
QUESTION 9
What is the minimum clearance required around a fire pump controller per NFPA 20?
A. 24 inches in front
B. 36 inches in front
C. 48 inches in front
D. 30 inches all around
CORRECT ANSWER: B. 36 inches in front
EXPERT RATIONALE: NFPA 20 requires a minimum of 36 inches of clear working space in
front of the fire pump controller for safe operation and maintenance.
NYC (DOB) Master Fire Suppression Piping Contractor
(Class C) Exam | Latest Verified Questions and Detailed
Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple-choice questions is designed for the NYC Master Fire
Suppression Piping Contractor (Class C) Exam, a closed-book test administered by the NYC
Department of Buildings. The exam assesses knowledge of public safety protocols, NYC
construction codes (with emphasis on Chapter 9 and relevant Plumbing Code sections),
and key NFPA standards such as NFPA 13, NFPA 14, and NFPA 20. Candidates must
demonstrate proficiency in hydraulic calculations, water supply requirements, fire pump
and alarm operations, and the testing, inspection, and maintenance procedures for wet-
pipe, dry-pipe, pre-action, and standpipe systems.
QUESTION 1
Which NYC Construction Code chapter governs the installation of fire protection
systems?
A. Chapter 7
B. Chapter 9
C. Chapter 11
D. Chapter 33
CORRECT ANSWER: B. Chapter 9
EXPERT RATIONALE: NYC Building Code Chapter 9 specifically regulates fire protection
systems, including automatic sprinklers and standpipes. Chapter 33 addresses
safeguards during construction, not system design.
QUESTION 2
According to NFPA 13, the minimum design area for the most remote 5 sprinklers in a
Light Hazard occupancy is how many square feet?
,2|Page
A. 900
B. 1,500
C. 2,000
D. 1,000
CORRECT ANSWER: B. 1,500
EXPERT RATIONALE: NFPA 13 design area for Light Hazard is 1500 sq ft for hydraulic
calculations. The number of sprinklers in the design area varies, but the area itself is
specified.
QUESTION 3
What is the maximum spacing allowed between sprinklers in a Light Hazard occupancy
under NFPA 13?
A. 12 ft
B. 15 ft
C. 20 ft
D. 10 ft
CORRECT ANSWER: B. 15 ft
EXPERT RATIONALE: NFPA 13 permits a maximum spacing of 15 feet for standard spray
sprinklers in Light Hazard, protecting up to 225 sq ft per sprinkler.
QUESTION 4
A Class I standpipe system requires a minimum flow rate of how many gallons per
minute at the most remote hose connection?
A. 250 gpm
B. 500 gpm
C. 750 gpm
D. 1,000 gpm
CORRECT ANSWER: B. 500 gpm
,3|Page
EXPERT RATIONALE: NFPA 14 requires Class I standpipes to provide 500 gpm for the
first standpipe plus 250 gpm for each additional standpipe, total not exceeding 1250
gpm.
QUESTION 5
Per NYC Building Code, what is the minimum size of a fire department connection (FDC)
pipe for a sprinkler system?
A. 4 inches
B. 5 inches
C. 6 inches
D. 8 inches
CORRECT ANSWER: C. 6 inches
EXPERT RATIONALE: NYC amendments require a minimum 6-inch pipe from the FDC to
the system riser. NFPA 13 may permit 4-inch, but NYC mandates 6-inch.
QUESTION 6
Which NFPA standard governs the installation of stationary fire pumps?
A. NFPA 13
B. NFPA 14
C. NFPA 20
D. NFPA 25
CORRECT ANSWER: C. NFPA 20
EXPERT RATIONALE: NFPA 20 is the standard for centrifugal fire pump installation. NFPA
25 covers inspection, testing, and maintenance.
QUESTION 7
In a wet-pipe sprinkler system, what is the primary purpose of the alarm check valve?
A. Prevent backflow
, 4|Page
B. Activate a water motor gong
C. Maintain system pressure and initiate alarm
D. Drain the system
CORRECT ANSWER: C. Maintain system pressure and initiate alarm
EXPERT RATIONALE: The alarm check valve keeps the system pressurized, prevents
water from returning to the supply, and triggers a local alarm when water flows.
QUESTION 8
According to NFPA 14, what is the maximum pressure allowed at any hose outlet in a
standpipe system under flow conditions?
A. 80 psi
B. 100 psi
C. 125 psi
D. 175 psi
CORRECT ANSWER: B. 100 psi
EXPERT RATIONALE: NFPA 14 limits outlet pressure to 100 psi to prevent excessive
nozzle reaction. Pressure-regulating devices may be required.
QUESTION 9
What is the minimum clearance required around a fire pump controller per NFPA 20?
A. 24 inches in front
B. 36 inches in front
C. 48 inches in front
D. 30 inches all around
CORRECT ANSWER: B. 36 inches in front
EXPERT RATIONALE: NFPA 20 requires a minimum of 36 inches of clear working space in
front of the fire pump controller for safe operation and maintenance.
