NFPA 24 TEST COMPREHENSIVE STUDY
GUIDE WITH ANSWERS
◉ What is the TFM10 exam reference?
Answer: NFPA 24 is the technical standard used for the Texas
TFM10 underground exam.
◉ What is a private fire service main?
Answer: Private piping and appurtenances supplying water to fire
protection systems.
◉ What does AHJ stand for?
Answer: Authority Having Jurisdiction.
◉ What does it mean if something is approved?
Answer: Acceptable to the Authority Having Jurisdiction.
◉ What does listed mean in this context?
Answer: Equipment or materials included on a list by an
acceptable testing/evaluation organization for a specified use.
◉ What is an appurtenance?
,Answer: An accessory or component associated with the fire
service main, such as a valve, hydrant, or fitting.
◉ What is working pressure?
Answer: The anticipated pressure under normal system
conditions; it affects required hydrostatic test pressure.
◉ What is a hydrostatic test?
Answer: A pressure test used to verify piping and joint integrity.
◉ What is the hydrostatic test pressure?
Answer: 200 psi or 50 psi above system working pressure,
whichever is greater.
◉ What is the duration of a hydrostatic test?
Answer: 2 hours.
◉ What is flushing?
Answer: Flowing water through piping to remove construction
debris and foreign material.
◉ What is the target velocity for flushing?
Answer: 10 ft/sec where the required flow is available.
, ◉ What is the approximate flushing flow for 4-inch pipe?
Answer: Approximately 390 gpm at 10 ft/sec.
◉ What is the approximate flushing flow for 6-inch pipe?
Answer: Approximately 880 gpm at 10 ft/sec.
◉ What is the approximate flushing flow for 8-inch pipe?
Answer: Approximately 1,560 gpm at 10 ft/sec.
◉ What is the approximate flushing flow for 10-inch pipe?
Answer: Approximately 2,440 gpm at 10 ft/sec.
◉ What is the approximate flushing flow for 12-inch pipe?
Answer: Approximately 3,520 gpm at 10 ft/sec.
◉ What is the flushing endpoint?
Answer: Continue until discharged water is verified clear of
debris.
◉ What should be done if full flushing flow is unavailable?
Answer: Use the maximum flow available as permitted by the
applicable NFPA 24 provisions.
◉ What is a debris hazard?
GUIDE WITH ANSWERS
◉ What is the TFM10 exam reference?
Answer: NFPA 24 is the technical standard used for the Texas
TFM10 underground exam.
◉ What is a private fire service main?
Answer: Private piping and appurtenances supplying water to fire
protection systems.
◉ What does AHJ stand for?
Answer: Authority Having Jurisdiction.
◉ What does it mean if something is approved?
Answer: Acceptable to the Authority Having Jurisdiction.
◉ What does listed mean in this context?
Answer: Equipment or materials included on a list by an
acceptable testing/evaluation organization for a specified use.
◉ What is an appurtenance?
,Answer: An accessory or component associated with the fire
service main, such as a valve, hydrant, or fitting.
◉ What is working pressure?
Answer: The anticipated pressure under normal system
conditions; it affects required hydrostatic test pressure.
◉ What is a hydrostatic test?
Answer: A pressure test used to verify piping and joint integrity.
◉ What is the hydrostatic test pressure?
Answer: 200 psi or 50 psi above system working pressure,
whichever is greater.
◉ What is the duration of a hydrostatic test?
Answer: 2 hours.
◉ What is flushing?
Answer: Flowing water through piping to remove construction
debris and foreign material.
◉ What is the target velocity for flushing?
Answer: 10 ft/sec where the required flow is available.
, ◉ What is the approximate flushing flow for 4-inch pipe?
Answer: Approximately 390 gpm at 10 ft/sec.
◉ What is the approximate flushing flow for 6-inch pipe?
Answer: Approximately 880 gpm at 10 ft/sec.
◉ What is the approximate flushing flow for 8-inch pipe?
Answer: Approximately 1,560 gpm at 10 ft/sec.
◉ What is the approximate flushing flow for 10-inch pipe?
Answer: Approximately 2,440 gpm at 10 ft/sec.
◉ What is the approximate flushing flow for 12-inch pipe?
Answer: Approximately 3,520 gpm at 10 ft/sec.
◉ What is the flushing endpoint?
Answer: Continue until discharged water is verified clear of
debris.
◉ What should be done if full flushing flow is unavailable?
Answer: Use the maximum flow available as permitted by the
applicable NFPA 24 provisions.
◉ What is a debris hazard?
