NFPA-25 Study Questions and
Answers | Latest Version | 2025/2026 |
Correct & Verified
What is the main purpose of NFPA 25 inspections?
✔✔To ensure fire protection systems are operational and code-compliant.
How often should sprinkler system water flow tests be conducted?
✔✔Annually.
What does a hydrostatic test verify in a fire protection piping system?
✔✔The system can withstand maximum operating pressure without leaking.
What is the minimum water pressure required at a sprinkler system riser?
✔✔7 psi above the sprinkler operating pressure.
Why is it important to inspect sprinkler heads for obstructions?
✔✔Obstructions can prevent proper water distribution during a fire.
1
,What is the primary function of a fire pump in a sprinkler system?
✔✔To provide adequate water flow and pressure to the system.
How often should fire pumps be tested under actual flow conditions?
✔✔Annually.
What is the purpose of a main drain test in a sprinkler system?
✔✔To verify water supply and check for obstructions or leaks.
What is the required minimum inspection frequency for sprinkler system valves?
✔✔Monthly for control valves, quarterly for main valves.
Why must antifreeze solutions in sprinkler systems be inspected?
✔✔To ensure they maintain proper concentration and are not contaminated.
How often should backflow preventers in fire protection systems be tested?
✔✔Annually.
2
, What is the main concern if a fire pump fails during operation?
✔✔Insufficient water supply can result in sprinkler system failure.
How frequently should dry pipe sprinkler systems undergo air or nitrogen pressure tests?
✔✔Quarterly.
What is the maximum allowable leakage from a sprinkler system control valve during
inspection?
✔✔Not more than a few drops per minute (per NFPA 25).
Why is it important to inspect sprinkler system hangers and supports?
✔✔Loose or missing supports can cause pipe movement or failure during activation.
What is the purpose of a trip test on a dry pipe valve?
✔✔To ensure the valve opens quickly and properly during a fire.
How often should fire department connections (FDC) be inspected?
✔✔Quarterly for visual inspection, annually for operational testing.
3
Answers | Latest Version | 2025/2026 |
Correct & Verified
What is the main purpose of NFPA 25 inspections?
✔✔To ensure fire protection systems are operational and code-compliant.
How often should sprinkler system water flow tests be conducted?
✔✔Annually.
What does a hydrostatic test verify in a fire protection piping system?
✔✔The system can withstand maximum operating pressure without leaking.
What is the minimum water pressure required at a sprinkler system riser?
✔✔7 psi above the sprinkler operating pressure.
Why is it important to inspect sprinkler heads for obstructions?
✔✔Obstructions can prevent proper water distribution during a fire.
1
,What is the primary function of a fire pump in a sprinkler system?
✔✔To provide adequate water flow and pressure to the system.
How often should fire pumps be tested under actual flow conditions?
✔✔Annually.
What is the purpose of a main drain test in a sprinkler system?
✔✔To verify water supply and check for obstructions or leaks.
What is the required minimum inspection frequency for sprinkler system valves?
✔✔Monthly for control valves, quarterly for main valves.
Why must antifreeze solutions in sprinkler systems be inspected?
✔✔To ensure they maintain proper concentration and are not contaminated.
How often should backflow preventers in fire protection systems be tested?
✔✔Annually.
2
, What is the main concern if a fire pump fails during operation?
✔✔Insufficient water supply can result in sprinkler system failure.
How frequently should dry pipe sprinkler systems undergo air or nitrogen pressure tests?
✔✔Quarterly.
What is the maximum allowable leakage from a sprinkler system control valve during
inspection?
✔✔Not more than a few drops per minute (per NFPA 25).
Why is it important to inspect sprinkler system hangers and supports?
✔✔Loose or missing supports can cause pipe movement or failure during activation.
What is the purpose of a trip test on a dry pipe valve?
✔✔To ensure the valve opens quickly and properly during a fire.
How often should fire department connections (FDC) be inspected?
✔✔Quarterly for visual inspection, annually for operational testing.
3
