NFPA 24 TEST PRACTICE QUESTIONS
WITH COMPLETE SOLUTIONS
◉ What is a check valve?
Answer: Permits flow in one direction and prevents reverse flow.
◉ What is a water supply in this context?
Answer: The source of water serving the private fire service main.
◉ What is bedding?
Answer: Suitable material/preparation supporting and protecting
underground pipe.
◉ What is backfill?
Answer: Material placed around and above underground piping
after installation.
◉ What is suitable backfill?
Answer: Material that supports and protects pipe without
damaging point loads, corrosion, or harmful settlement.
◉ What is unsuitable backfill?
Answer: Frozen earth, refuse, corrosive material, ashes, cinders,
organic matter, or other damaging material.
, ◉ What is a soft trench bottom?
Answer: Provide suitable bedding or another means of adequate
pipe support.
◉ What should be checked during pipe inspection before
installation?
Answer: Check pipe and fittings for cracks, damage, defects, and
contamination.
◉ What is physical damage protection?
Answer: Protect piping, hydrants, valves, and appurtenances from
impact and other damage.
◉ What is freeze protection?
Answer: Protect piping and appurtenances where freezing
conditions are possible.
◉ What is acceptance testing?
Answer: Required testing and inspection demonstrating the
installed system is ready for service.
◉ What is the Contractor's Material and Test Certificate?
Answer: Documents underground materials, flushing, hydrostatic
testing, and acceptance information.
WITH COMPLETE SOLUTIONS
◉ What is a check valve?
Answer: Permits flow in one direction and prevents reverse flow.
◉ What is a water supply in this context?
Answer: The source of water serving the private fire service main.
◉ What is bedding?
Answer: Suitable material/preparation supporting and protecting
underground pipe.
◉ What is backfill?
Answer: Material placed around and above underground piping
after installation.
◉ What is suitable backfill?
Answer: Material that supports and protects pipe without
damaging point loads, corrosion, or harmful settlement.
◉ What is unsuitable backfill?
Answer: Frozen earth, refuse, corrosive material, ashes, cinders,
organic matter, or other damaging material.
, ◉ What is a soft trench bottom?
Answer: Provide suitable bedding or another means of adequate
pipe support.
◉ What should be checked during pipe inspection before
installation?
Answer: Check pipe and fittings for cracks, damage, defects, and
contamination.
◉ What is physical damage protection?
Answer: Protect piping, hydrants, valves, and appurtenances from
impact and other damage.
◉ What is freeze protection?
Answer: Protect piping and appurtenances where freezing
conditions are possible.
◉ What is acceptance testing?
Answer: Required testing and inspection demonstrating the
installed system is ready for service.
◉ What is the Contractor's Material and Test Certificate?
Answer: Documents underground materials, flushing, hydrostatic
testing, and acceptance information.
