NEWEST INSPECTION AND TESTING OF
WATER-BASED SYSTEMS III CERTIFICATION
EXAM OFFERED BY NATIONAL INSTITUTE FOR
CERTIFICATION IN ENGINEERING
TECHNOLOGIES | COMPLETE EXAM Q&A WITH
RATIONALES
1. You are evaluating a deluge system that has been
in service for 12 years. The 5-year valve internal
inspection report is missing. What is your immediate
action?
A) Assume the system is acceptable and continue
routine testing
B) Schedule an internal inspection of the deluge valve
immediately
C) Accept verbal confirmation from the building
owner that the inspection was performed
D) Do nothing; internal inspections are not required
for deluge valves
Correct answer: B
Rationale: NFPA 25 requires internal inspection of
deluge valves every 5 years; missing documentation
means the inspection must be performed.
,2. A dry pipe system has an air compressor that runs
every 30 minutes. The low air pressure switch is set
at 30 psi, and the system is maintained at 40 psi. You
suspect a leak. The most effective method to locate
the leak is:
A) Check for air bubbles using soapy water on all
visible fittings and valves
B) Isolate sections of the system and monitor
pressure drop
C) Increase compressor pressure to 60 psi and listen
for hissing sounds
D) Add dye to the air line to detect escaping air
Correct answer: B
Rationale: Systematic section isolation and pressure
monitoring is the most reliable method for pinpointing
leak location.
3. During the 5-year internal inspection of a dry pipe
valve, you find significant pitting on the clapper
seating surface. What is the required action?
A) Note the corrosion and reinstall the clapper
B) Record the condition and recommend valve
replacement
C) Clean the surface with a wire brush and reinstall
,D) Apply a sealant to the pitted surface
Correct answer: B
Rationale: Pitting on the seating surface can prevent
proper sealing; NFPA 25 requires that damaged
components be repaired or replaced.
4. A check valve on a fire pump discharge line is
chattering when the pump runs at churn. What is the
most likely cause?
A) The check valve is installed backwards
B) The spring tension is too strong
C) The pump is cavitating due to low suction pressure
D) The check valve is the incorrect type for low flow
conditions
Correct answer: D
Rationale: Chattering often occurs when a swing
check valve is used in low flow or churn conditions; a
spring-assisted silent check valve is typically
required.
5. You are performing a forward flow test on a
backflow preventer serving a fire sprinkler system.
The pressure loss across the device at the required
flow is 25 psi. The design documents specified a
, maximum loss of 15 psi. What is the appropriate
conclusion?
A) The test is successful because the device opened
B) The backflow preventer fails to meet the hydraulic
design requirements
C) The pressure gauges are likely inaccurate; repeat
the test with calibrated gauges
D) The test pressure is acceptable because fire
pumps can overcome higher losses
Correct answer: B
Rationale: NFPA 25 requires verification of adequate
water supply; excessive pressure loss indicates a
deficiency.
6. A 5-year hydrostatic test of a standpipe system is
being conducted. The system must be tested at 200
psi for 2 hours. After 30 minutes, a small leak is
discovered at a threaded fitting. What is the proper
action?
A) Tighten the fitting immediately and continue the
test
B) Record the leak and recommend repair; the test
fails
C) Ignore the leak because it is minor
WATER-BASED SYSTEMS III CERTIFICATION
EXAM OFFERED BY NATIONAL INSTITUTE FOR
CERTIFICATION IN ENGINEERING
TECHNOLOGIES | COMPLETE EXAM Q&A WITH
RATIONALES
1. You are evaluating a deluge system that has been
in service for 12 years. The 5-year valve internal
inspection report is missing. What is your immediate
action?
A) Assume the system is acceptable and continue
routine testing
B) Schedule an internal inspection of the deluge valve
immediately
C) Accept verbal confirmation from the building
owner that the inspection was performed
D) Do nothing; internal inspections are not required
for deluge valves
Correct answer: B
Rationale: NFPA 25 requires internal inspection of
deluge valves every 5 years; missing documentation
means the inspection must be performed.
,2. A dry pipe system has an air compressor that runs
every 30 minutes. The low air pressure switch is set
at 30 psi, and the system is maintained at 40 psi. You
suspect a leak. The most effective method to locate
the leak is:
A) Check for air bubbles using soapy water on all
visible fittings and valves
B) Isolate sections of the system and monitor
pressure drop
C) Increase compressor pressure to 60 psi and listen
for hissing sounds
D) Add dye to the air line to detect escaping air
Correct answer: B
Rationale: Systematic section isolation and pressure
monitoring is the most reliable method for pinpointing
leak location.
3. During the 5-year internal inspection of a dry pipe
valve, you find significant pitting on the clapper
seating surface. What is the required action?
A) Note the corrosion and reinstall the clapper
B) Record the condition and recommend valve
replacement
C) Clean the surface with a wire brush and reinstall
,D) Apply a sealant to the pitted surface
Correct answer: B
Rationale: Pitting on the seating surface can prevent
proper sealing; NFPA 25 requires that damaged
components be repaired or replaced.
4. A check valve on a fire pump discharge line is
chattering when the pump runs at churn. What is the
most likely cause?
A) The check valve is installed backwards
B) The spring tension is too strong
C) The pump is cavitating due to low suction pressure
D) The check valve is the incorrect type for low flow
conditions
Correct answer: D
Rationale: Chattering often occurs when a swing
check valve is used in low flow or churn conditions; a
spring-assisted silent check valve is typically
required.
5. You are performing a forward flow test on a
backflow preventer serving a fire sprinkler system.
The pressure loss across the device at the required
flow is 25 psi. The design documents specified a
, maximum loss of 15 psi. What is the appropriate
conclusion?
A) The test is successful because the device opened
B) The backflow preventer fails to meet the hydraulic
design requirements
C) The pressure gauges are likely inaccurate; repeat
the test with calibrated gauges
D) The test pressure is acceptable because fire
pumps can overcome higher losses
Correct answer: B
Rationale: NFPA 25 requires verification of adequate
water supply; excessive pressure loss indicates a
deficiency.
6. A 5-year hydrostatic test of a standpipe system is
being conducted. The system must be tested at 200
psi for 2 hours. After 30 minutes, a small leak is
discovered at a threaded fitting. What is the proper
action?
A) Tighten the fitting immediately and continue the
test
B) Record the leak and recommend repair; the test
fails
C) Ignore the leak because it is minor
