TEXAS DEPARTMENT OF INSURANCE TFM10 NFPA 24 EXAM –
QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED
ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST
EXAM UPDATE
CORE DOMAINS
*1. Scope and Application of NFPA 24*
2. Underground Piping Materials and Specifications
3. Installation Requirements and Depth of Cover
4. Thrust Blocks and Pipe Restraint Methods
5. Hydrostatic Testing and Flushing Procedures
6. Fire Hydrants and Appurtenances
7. Valves and Fire Department Connections
8. TDI Licensing and Regulatory Compliance
INTRODUCTION
The Texas Department of Insurance TFM10 NFPA 24 Exam assesses
the knowledge and skills required for Responsible Managing
Employee-Underground (RME-U) licensees to install, maintain,
service, and certify underground water supply piping for fire
protection sprinkler systems. The examination covers NFPA 24
standards for private fire service mains, including pipe materials,
depth of cover, thrust blocks, hydrostatic testing, flushing
procedures, and appurtenances. The multiple-choice and scenario-
based structure emphasizes real-world application and decision-
making, ensuring candidates demonstrate competency in
underground fire main installation, regulatory compliance, and
operational safety. This assessment prepares professionals for the
responsibilities of underground sprinkler system leadership in Texas.
SECTION ONE: QUESTIONS 1–100
Question 1
According to NFPA 24-2022, which of the following systems is
,NOT covered by the standard?
A. Automatic sprinkler systems supplied by private fire service
mains
B. Private fire hydrants and monitor nozzles
C. Dry fire hydrants utilized for drafting operations
D. Water spray fixed systems supplied by private mains
🟢 Correct answer:
C. Dry fire hydrants utilized for drafting operations
🔴 RATIONALE:
NFPA 24 Section 1.1.3 explicitly states that the standard does not
apply to dry fire hydrants utilized for drafting or mains connected
to dry fire hydrants utilized for drafting. Options A, B, and D are
systems explicitly listed in Section 1.1.1 as being covered by NFPA
24.
Question 2
NFPA 24-2022 does NOT apply to underground mains serving
sprinkler systems designed per NFPA 13D when the nominal
diameter is less than:
A. 2 inches (50 mm)
B. 3 inches (75 mm)
C. 4 inches (100 mm)
D. 6 inches (150 mm)
🟢 Correct answer:
C. 4 inches (100 mm)
🔴 RATIONALE:
NFPA 24 Section 1.1.4 states the standard does not apply to
,underground mains serving sprinkler systems designed and
installed in accordance with NFPA 13D that are less than 4 inches
(100 mm) in nominal diameter.
Question 3
What is the minimum required depth of cover for private fire
service mains installed in vehicular traffic areas per NFPA 24-2022?
A. 12 inches (305 mm)
B. 18 inches (457 mm)
C. 24 inches (610 mm)
D. 30 inches (762 mm)
🟢 Correct answer:
D. 30 inches (762 mm)
🔴 RATIONALE:
NFPA 24 Section 10.4.3 requires a minimum depth of cover of 30
inches (762 mm) or 2.5 feet in areas subject to vehicular traffic to
protect against mechanical damage.
Question 4
In non-vehicular grass areas where freezing is not a factor, what is
the minimum depth of cover for private fire service mains?
A. 6 inches (152 mm)
B. 12 inches (305 mm)
C. 18 inches (457 mm)
D. 24 inches (610 mm)
, 🟢 Correct answer:
B. 12 inches (305 mm)
🔴 RATIONALE:
NFPA 24 Section 10.4.3 allows a minimum of 12 inches (305 mm)
of cover in non-vehicular areas where freezing is not a concern.
Option D (30 inches) applies to vehicular areas.
Question 5
What is the minimum pipe size allowed for underground fire
service mains per NFPA 24?
A. 2 inches
B. 4 inches
C. 6 inches
D. 8 inches
🟢 Correct answer:
C. 6 inches
🔴 RATIONALE:
NFPA 24 requires a minimum pipe size of 6 inches (150 mm) for
underground fire service mains, ensuring adequate flow capacity
for fire protection systems.
Question 6
Steel pipe used for underground fire service mains must be
minimum Schedule:
A. 10
B. 20
QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED
ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST
EXAM UPDATE
CORE DOMAINS
*1. Scope and Application of NFPA 24*
2. Underground Piping Materials and Specifications
3. Installation Requirements and Depth of Cover
4. Thrust Blocks and Pipe Restraint Methods
5. Hydrostatic Testing and Flushing Procedures
6. Fire Hydrants and Appurtenances
7. Valves and Fire Department Connections
8. TDI Licensing and Regulatory Compliance
INTRODUCTION
The Texas Department of Insurance TFM10 NFPA 24 Exam assesses
the knowledge and skills required for Responsible Managing
Employee-Underground (RME-U) licensees to install, maintain,
service, and certify underground water supply piping for fire
protection sprinkler systems. The examination covers NFPA 24
standards for private fire service mains, including pipe materials,
depth of cover, thrust blocks, hydrostatic testing, flushing
procedures, and appurtenances. The multiple-choice and scenario-
based structure emphasizes real-world application and decision-
making, ensuring candidates demonstrate competency in
underground fire main installation, regulatory compliance, and
operational safety. This assessment prepares professionals for the
responsibilities of underground sprinkler system leadership in Texas.
SECTION ONE: QUESTIONS 1–100
Question 1
According to NFPA 24-2022, which of the following systems is
,NOT covered by the standard?
A. Automatic sprinkler systems supplied by private fire service
mains
B. Private fire hydrants and monitor nozzles
C. Dry fire hydrants utilized for drafting operations
D. Water spray fixed systems supplied by private mains
🟢 Correct answer:
C. Dry fire hydrants utilized for drafting operations
🔴 RATIONALE:
NFPA 24 Section 1.1.3 explicitly states that the standard does not
apply to dry fire hydrants utilized for drafting or mains connected
to dry fire hydrants utilized for drafting. Options A, B, and D are
systems explicitly listed in Section 1.1.1 as being covered by NFPA
24.
Question 2
NFPA 24-2022 does NOT apply to underground mains serving
sprinkler systems designed per NFPA 13D when the nominal
diameter is less than:
A. 2 inches (50 mm)
B. 3 inches (75 mm)
C. 4 inches (100 mm)
D. 6 inches (150 mm)
🟢 Correct answer:
C. 4 inches (100 mm)
🔴 RATIONALE:
NFPA 24 Section 1.1.4 states the standard does not apply to
,underground mains serving sprinkler systems designed and
installed in accordance with NFPA 13D that are less than 4 inches
(100 mm) in nominal diameter.
Question 3
What is the minimum required depth of cover for private fire
service mains installed in vehicular traffic areas per NFPA 24-2022?
A. 12 inches (305 mm)
B. 18 inches (457 mm)
C. 24 inches (610 mm)
D. 30 inches (762 mm)
🟢 Correct answer:
D. 30 inches (762 mm)
🔴 RATIONALE:
NFPA 24 Section 10.4.3 requires a minimum depth of cover of 30
inches (762 mm) or 2.5 feet in areas subject to vehicular traffic to
protect against mechanical damage.
Question 4
In non-vehicular grass areas where freezing is not a factor, what is
the minimum depth of cover for private fire service mains?
A. 6 inches (152 mm)
B. 12 inches (305 mm)
C. 18 inches (457 mm)
D. 24 inches (610 mm)
, 🟢 Correct answer:
B. 12 inches (305 mm)
🔴 RATIONALE:
NFPA 24 Section 10.4.3 allows a minimum of 12 inches (305 mm)
of cover in non-vehicular areas where freezing is not a concern.
Option D (30 inches) applies to vehicular areas.
Question 5
What is the minimum pipe size allowed for underground fire
service mains per NFPA 24?
A. 2 inches
B. 4 inches
C. 6 inches
D. 8 inches
🟢 Correct answer:
C. 6 inches
🔴 RATIONALE:
NFPA 24 requires a minimum pipe size of 6 inches (150 mm) for
underground fire service mains, ensuring adequate flow capacity
for fire protection systems.
Question 6
Steel pipe used for underground fire service mains must be
minimum Schedule:
A. 10
B. 20
