Self-Contained Breathing Apparatus (SCBA)
Technician Level III Certification Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of a Level III SCBA technician?
A. Conduct basic annual flow tests
B. Perform user-level inspections
C. Conduct advanced diagnostics and overhaul repairs
D. Train entry-level SCBA users
Answer: C
Rationale: Level III certification focuses on advanced repairs,
troubleshooting, and high-level diagnostics beyond Level I and II scope.
,2. Which component is most critical to evaluate during a full SCBA pressure
integrity test?
A. Facepiece straps
B. Cylinder valve handle
C. High-pressure hose and connections
D. PASS device battery
Rationale: High-pressure lines and connections are the most likely failure
points for leaks under pressure.
3. The first step in diagnosing intermittent airflow restriction is to check
the:
A. PASS device
B. First-stage pressure reducer
C. HUD display
D. Cylinder gauge
Rationale: Airflow restriction typically starts at the pressure reducer
affecting downstream regulators.
4. Hydrostatic testing for composite cylinders is typically required every:
A. 1 year
B. 3 years
C. 5 years
,D. 10 years
Rationale: Composite cylinders follow a 5-year hydrostatic test interval
under DOT regulations.
5. Excessive vibration in the regulator during inhalation usually indicates a
problem with:
A. Battery pack
B. PASS alarm module
C. Demand valve balancing mechanism
D. Cylinder threads
Rationale: Vibrations are signs of instability in the demand valve or
balancing system.
6. During an advanced leak test, soap solution bubbles on the reducer
indicate:
A. Pressure imbalance
B. Faulty HUD
C. A leak requiring disassembly and resealing
D. Low battery
Rationale: Soap bubbles confirm an external leak that requires repair, not
internal diagnostics.
, 7. When replacing an O-ring on a high-pressure fitting, the technician must
ensure:
A. The O-ring is lubricated with petroleum grease
B. Only manufacturer-approved O-rings are used
C. The O-ring is replaced with any matching size
D. The O-ring is left dry
Rationale: SCBA manufacturers require specific materials to prevent
chemical incompatibility or failure.
8. A failing first-stage regulator will commonly show:
A. Slow HUD light blinking
B. Inconsistent intermediate pressure
C. PASS device locking
D. No change in cylinder weight
Rationale: Intermediate pressure instability is the primary indicator of first-
stage regulator issues.
9. NFPA 1981 dictates performance requirements for:
A. Training drills
B. SCBA storage
C. SCBA design and certification standards
D. PASS device use
Technician Level III Certification Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of a Level III SCBA technician?
A. Conduct basic annual flow tests
B. Perform user-level inspections
C. Conduct advanced diagnostics and overhaul repairs
D. Train entry-level SCBA users
Answer: C
Rationale: Level III certification focuses on advanced repairs,
troubleshooting, and high-level diagnostics beyond Level I and II scope.
,2. Which component is most critical to evaluate during a full SCBA pressure
integrity test?
A. Facepiece straps
B. Cylinder valve handle
C. High-pressure hose and connections
D. PASS device battery
Rationale: High-pressure lines and connections are the most likely failure
points for leaks under pressure.
3. The first step in diagnosing intermittent airflow restriction is to check
the:
A. PASS device
B. First-stage pressure reducer
C. HUD display
D. Cylinder gauge
Rationale: Airflow restriction typically starts at the pressure reducer
affecting downstream regulators.
4. Hydrostatic testing for composite cylinders is typically required every:
A. 1 year
B. 3 years
C. 5 years
,D. 10 years
Rationale: Composite cylinders follow a 5-year hydrostatic test interval
under DOT regulations.
5. Excessive vibration in the regulator during inhalation usually indicates a
problem with:
A. Battery pack
B. PASS alarm module
C. Demand valve balancing mechanism
D. Cylinder threads
Rationale: Vibrations are signs of instability in the demand valve or
balancing system.
6. During an advanced leak test, soap solution bubbles on the reducer
indicate:
A. Pressure imbalance
B. Faulty HUD
C. A leak requiring disassembly and resealing
D. Low battery
Rationale: Soap bubbles confirm an external leak that requires repair, not
internal diagnostics.
, 7. When replacing an O-ring on a high-pressure fitting, the technician must
ensure:
A. The O-ring is lubricated with petroleum grease
B. Only manufacturer-approved O-rings are used
C. The O-ring is replaced with any matching size
D. The O-ring is left dry
Rationale: SCBA manufacturers require specific materials to prevent
chemical incompatibility or failure.
8. A failing first-stage regulator will commonly show:
A. Slow HUD light blinking
B. Inconsistent intermediate pressure
C. PASS device locking
D. No change in cylinder weight
Rationale: Intermediate pressure instability is the primary indicator of first-
stage regulator issues.
9. NFPA 1981 dictates performance requirements for:
A. Training drills
B. SCBA storage
C. SCBA design and certification standards
D. PASS device use
