Texas Boiler Inspector Licensing Exam – 150 Practice Questions and
Answers (Complete Solutions)| 2025/2026
Q1: What is the primary purpose of a boiler inspection?
a) Check fuel efficiency
b) Ensure safe operation and compliance with regulations (correct answer)
c) Evaluate cost of repair
d) Inspect building foundation
Rationale: Boiler inspections focus on safety, code compliance, and prevention of accidents.
Q2: Which organization sets the national standards for boiler construction and inspection?
a) OSHA
b) NFPA
c) ASME (correct answer)
d) API
Rationale: The American Society of Mechanical Engineers (ASME) establishes construction, safety, and
inspection standards.
Q3: The ASME “U” stamp indicates that a boiler:
a) Is used for residential purposes
b) Has passed safety tests
c) Complies with ASME pressure vessel construction standards (correct answer)
d) Is energy efficient
Rationale: The “U” stamp certifies compliance with ASME pressure vessel requirements.
Q4: Which type of boiler uses water-tube construction?
a) Fire-tube boiler
,b) Water-tube boiler (correct answer)
c) Electric boiler
d) Cast-iron sectional boiler
Rationale: In water-tube boilers, water circulates through tubes heated externally by combustion gases.
Q5: What is the maximum allowable working pressure (MAWP) of a boiler?
a) Pressure during installation
b) The highest pressure the boiler is designed to safely operate at (correct answer)
c) Pressure at cold start
d) Ambient atmospheric pressure
Rationale: MAWP is the limit specified by the manufacturer and enforced by inspection codes.
Q6: What is the purpose of a safety relief valve on a boiler?
a) Improve efficiency
b) Maintain water level
c) Prevent overpressure and explosions (correct answer)
d) Control combustion
Rationale: Safety valves automatically release pressure if it exceeds MAWP, preventing catastrophic failure.
Q7: During inspection, what is an inspector primarily checking in a boiler’s fusible plug?
a) Efficiency
b) Color of plug
c) Proper melting temperature for safety (correct answer)
d) Valve alignment
Rationale: Fusible plugs melt at high temperatures to prevent overheating and boiler damage.
Q8: Which component of a fire-tube boiler contains the hot gases?
a) Water drum
b) Tubes (correct answer)
,c) Safety valve
d) Feedwater pump
Rationale: Hot combustion gases pass through the tubes to transfer heat to surrounding water.
Q9: How often must a Texas boiler typically be inspected by a licensed inspector?
a) Every 6 months
b) Every 5 years
c) Annually or as specified by law (correct answer)
d) Only at installation
Rationale: Regular inspections ensure ongoing safety and compliance with state regulations.
Q10: Which of the following is considered a low-pressure boiler?
a) MAWP > 250 psi
b) MAWP ≤ 15 psi for steam or ≤ 160 psi for water (correct answer)
c) MAWP > 500 psi
d) MAWP > 100 psi
Rationale: Low-pressure boilers operate at lower pressures, reducing risk and code requirements.
Q11: A boiler’s water level must be maintained within:
a) The limits marked on the gauge glass (correct answer)
b) Twice the gauge glass range
c) Operator’s estimation
d) Any visible level
Rationale: Maintaining proper water level prevents overheating and exposure of boiler surfaces.
Q12: Which of the following can cause boiler tube failure?
a) Proper maintenance
b) Overheating, corrosion, or scaling (correct answer)
c) Using clean water
, d) Low ambient temperature
Rationale: Excessive heat, corrosion, and scale reduce tube strength and can cause rupture.
Q13: The “hydrostatic test” is performed to:
a) Test fuel efficiency
b) Inspect electrical components
c) Verify strength and leak-tightness of the boiler (correct answer)
d) Check burner alignment
Rationale: Hydrostatic testing fills the boiler with water and applies pressure to detect leaks or weaknesses.
Q14: Which gauge indicates boiler pressure?
a) Flow meter
b) Thermometer
c) Pressure gauge (correct answer)
d) Level indicator
Rationale: Pressure gauges monitor the internal pressure of the boiler for safe operation.
Q15: What is the primary function of a feedwater regulator?
a) Reduce boiler noise
b) Maintain proper water level (correct answer)
c) Increase fuel efficiency
d) Release pressure
Rationale: Feedwater regulators control water supply to maintain safe and adequate levels in the boiler.
Q16: Which type of boiler is commonly used in industrial plants for high-pressure steam?
a) Electric boiler
b) Water-tube boiler (correct answer)
c) Fire-tube boiler
Answers (Complete Solutions)| 2025/2026
Q1: What is the primary purpose of a boiler inspection?
a) Check fuel efficiency
b) Ensure safe operation and compliance with regulations (correct answer)
c) Evaluate cost of repair
d) Inspect building foundation
Rationale: Boiler inspections focus on safety, code compliance, and prevention of accidents.
Q2: Which organization sets the national standards for boiler construction and inspection?
a) OSHA
b) NFPA
c) ASME (correct answer)
d) API
Rationale: The American Society of Mechanical Engineers (ASME) establishes construction, safety, and
inspection standards.
Q3: The ASME “U” stamp indicates that a boiler:
a) Is used for residential purposes
b) Has passed safety tests
c) Complies with ASME pressure vessel construction standards (correct answer)
d) Is energy efficient
Rationale: The “U” stamp certifies compliance with ASME pressure vessel requirements.
Q4: Which type of boiler uses water-tube construction?
a) Fire-tube boiler
,b) Water-tube boiler (correct answer)
c) Electric boiler
d) Cast-iron sectional boiler
Rationale: In water-tube boilers, water circulates through tubes heated externally by combustion gases.
Q5: What is the maximum allowable working pressure (MAWP) of a boiler?
a) Pressure during installation
b) The highest pressure the boiler is designed to safely operate at (correct answer)
c) Pressure at cold start
d) Ambient atmospheric pressure
Rationale: MAWP is the limit specified by the manufacturer and enforced by inspection codes.
Q6: What is the purpose of a safety relief valve on a boiler?
a) Improve efficiency
b) Maintain water level
c) Prevent overpressure and explosions (correct answer)
d) Control combustion
Rationale: Safety valves automatically release pressure if it exceeds MAWP, preventing catastrophic failure.
Q7: During inspection, what is an inspector primarily checking in a boiler’s fusible plug?
a) Efficiency
b) Color of plug
c) Proper melting temperature for safety (correct answer)
d) Valve alignment
Rationale: Fusible plugs melt at high temperatures to prevent overheating and boiler damage.
Q8: Which component of a fire-tube boiler contains the hot gases?
a) Water drum
b) Tubes (correct answer)
,c) Safety valve
d) Feedwater pump
Rationale: Hot combustion gases pass through the tubes to transfer heat to surrounding water.
Q9: How often must a Texas boiler typically be inspected by a licensed inspector?
a) Every 6 months
b) Every 5 years
c) Annually or as specified by law (correct answer)
d) Only at installation
Rationale: Regular inspections ensure ongoing safety and compliance with state regulations.
Q10: Which of the following is considered a low-pressure boiler?
a) MAWP > 250 psi
b) MAWP ≤ 15 psi for steam or ≤ 160 psi for water (correct answer)
c) MAWP > 500 psi
d) MAWP > 100 psi
Rationale: Low-pressure boilers operate at lower pressures, reducing risk and code requirements.
Q11: A boiler’s water level must be maintained within:
a) The limits marked on the gauge glass (correct answer)
b) Twice the gauge glass range
c) Operator’s estimation
d) Any visible level
Rationale: Maintaining proper water level prevents overheating and exposure of boiler surfaces.
Q12: Which of the following can cause boiler tube failure?
a) Proper maintenance
b) Overheating, corrosion, or scaling (correct answer)
c) Using clean water
, d) Low ambient temperature
Rationale: Excessive heat, corrosion, and scale reduce tube strength and can cause rupture.
Q13: The “hydrostatic test” is performed to:
a) Test fuel efficiency
b) Inspect electrical components
c) Verify strength and leak-tightness of the boiler (correct answer)
d) Check burner alignment
Rationale: Hydrostatic testing fills the boiler with water and applies pressure to detect leaks or weaknesses.
Q14: Which gauge indicates boiler pressure?
a) Flow meter
b) Thermometer
c) Pressure gauge (correct answer)
d) Level indicator
Rationale: Pressure gauges monitor the internal pressure of the boiler for safe operation.
Q15: What is the primary function of a feedwater regulator?
a) Reduce boiler noise
b) Maintain proper water level (correct answer)
c) Increase fuel efficiency
d) Release pressure
Rationale: Feedwater regulators control water supply to maintain safe and adequate levels in the boiler.
Q16: Which type of boiler is commonly used in industrial plants for high-pressure steam?
a) Electric boiler
b) Water-tube boiler (correct answer)
c) Fire-tube boiler
