___________________________________________________________________
__ Certified Pressure Vessel Technician
Exam — 100-Question Advanced
Practice Exam 2026 | Questions &
Answers with Detailed Rationales |
Complete Pressure Vessel Technician
Exam Prep & Study Guide
_________________________________________________________________
1. What is the primary purpose of a pressure vessel?
A. To increase fluid velocity
B. To store or contain fluids under pressure
C. To reduce electrical resistance
D. To measure temperature
Answer: B. To store or contain fluids under pressure
Rationale: Pressure vessels are designed to safely contain gases or liquids at
pressures substantially different from atmospheric pressure.
2. Which factor is most important when determining the allowable working
pressure of a pressure vessel?
A. Paint color
B. Shell material, thickness, temperature, and design code
,C. Vessel location only
D. Insulation color
Answer: B. Shell material, thickness, temperature, and design code
Rationale: Allowable pressure depends on material strength, wall thickness,
operating temperature, corrosion allowance, joint efficiency, and applicable
design requirements.
3. What does MAWP stand for?
A. Maximum Applied Water Pressure
B. Minimum Allowable Weld Pressure
C. Maximum Allowable Working Pressure
D. Maximum Atmospheric Working Point
Answer: C. Maximum Allowable Working Pressure
Rationale: MAWP is the maximum pressure permissible at a specified
temperature, considering the weakest pressure-retaining component and
applicable code requirements.
4. Which component normally provides the main cylindrical pressure
boundary of a vessel?
A. Shell
B. Handwheel
C. Sight glass
D. Drain valve
Answer: A. Shell
Rationale: The shell forms the primary cylindrical pressure-retaining boundary
and is commonly reinforced by heads, stiffeners, or other structural components.
5. What is the primary function of a pressure-vessel head?
,A. Increase electrical conductivity
B. Close the ends of the vessel while resisting internal pressure
C. Control fluid chemistry
D. Measure vessel vibration
Answer: B. Close the ends of the vessel while resisting internal pressure
Rationale: Heads form pressure-retaining end closures and are designed to
withstand membrane and bending stresses generated by internal pressure.
6. Which head shape generally provides efficient pressure distribution?
A. Hemispherical
B. Flat unsupported plate
C. Irregular polygon
D. Open-ended plate
Answer: A. Hemispherical
Rationale: A hemispherical head distributes pressure-induced stresses efficiently
and can require less thickness than many other head configurations for the
same conditions.
7. What is the purpose of a corrosion allowance?
A. To compensate for anticipated material loss during service
B. To increase electrical grounding
C. To improve paint adhesion
D. To reduce vessel weight
Answer: A. To compensate for anticipated material loss during service
Rationale: Additional material thickness may be provided so that expected
corrosion or erosion does not reduce the vessel below its required minimum
thickness during the intended service life.
8. Which inspection method is commonly used to detect surface-breaking
cracks in nonporous materials?
, A. Magnetic particle testing
B. Hydrostatic weighing
C. Temperature mapping
D. Pressure recording
Answer: A. Magnetic particle testing
Rationale: Magnetic particle testing can reveal surface and near-surface
discontinuities in ferromagnetic materials by creating magnetic leakage fields.
9. Which NDT method uses high-frequency sound waves?
A. Radiographic testing
B. Ultrasonic testing
C. Visual testing
D. Dye evaporation testing
Answer: B. Ultrasonic testing
Rationale: Ultrasonic testing uses high-frequency sound waves to detect internal
discontinuities and measure material thickness.
10.What is a major advantage of ultrasonic thickness measurement?
A. It normally requires removal of the vessel shell
B. It can measure wall thickness from one accessible surface
C. It permanently modifies the material
D. It only works on painted wood
Answer: B. It can measure wall thickness from one accessible surface
Rationale: Ultrasonic thickness gauges can determine remaining wall thickness
without cutting the vessel open, making them useful for corrosion monitoring.
11.What is the main purpose of a pressure relief valve?
A. Prevent excessive pressure from damaging the vessel
B. Increase operating pressure
__ Certified Pressure Vessel Technician
Exam — 100-Question Advanced
Practice Exam 2026 | Questions &
Answers with Detailed Rationales |
Complete Pressure Vessel Technician
Exam Prep & Study Guide
_________________________________________________________________
1. What is the primary purpose of a pressure vessel?
A. To increase fluid velocity
B. To store or contain fluids under pressure
C. To reduce electrical resistance
D. To measure temperature
Answer: B. To store or contain fluids under pressure
Rationale: Pressure vessels are designed to safely contain gases or liquids at
pressures substantially different from atmospheric pressure.
2. Which factor is most important when determining the allowable working
pressure of a pressure vessel?
A. Paint color
B. Shell material, thickness, temperature, and design code
,C. Vessel location only
D. Insulation color
Answer: B. Shell material, thickness, temperature, and design code
Rationale: Allowable pressure depends on material strength, wall thickness,
operating temperature, corrosion allowance, joint efficiency, and applicable
design requirements.
3. What does MAWP stand for?
A. Maximum Applied Water Pressure
B. Minimum Allowable Weld Pressure
C. Maximum Allowable Working Pressure
D. Maximum Atmospheric Working Point
Answer: C. Maximum Allowable Working Pressure
Rationale: MAWP is the maximum pressure permissible at a specified
temperature, considering the weakest pressure-retaining component and
applicable code requirements.
4. Which component normally provides the main cylindrical pressure
boundary of a vessel?
A. Shell
B. Handwheel
C. Sight glass
D. Drain valve
Answer: A. Shell
Rationale: The shell forms the primary cylindrical pressure-retaining boundary
and is commonly reinforced by heads, stiffeners, or other structural components.
5. What is the primary function of a pressure-vessel head?
,A. Increase electrical conductivity
B. Close the ends of the vessel while resisting internal pressure
C. Control fluid chemistry
D. Measure vessel vibration
Answer: B. Close the ends of the vessel while resisting internal pressure
Rationale: Heads form pressure-retaining end closures and are designed to
withstand membrane and bending stresses generated by internal pressure.
6. Which head shape generally provides efficient pressure distribution?
A. Hemispherical
B. Flat unsupported plate
C. Irregular polygon
D. Open-ended plate
Answer: A. Hemispherical
Rationale: A hemispherical head distributes pressure-induced stresses efficiently
and can require less thickness than many other head configurations for the
same conditions.
7. What is the purpose of a corrosion allowance?
A. To compensate for anticipated material loss during service
B. To increase electrical grounding
C. To improve paint adhesion
D. To reduce vessel weight
Answer: A. To compensate for anticipated material loss during service
Rationale: Additional material thickness may be provided so that expected
corrosion or erosion does not reduce the vessel below its required minimum
thickness during the intended service life.
8. Which inspection method is commonly used to detect surface-breaking
cracks in nonporous materials?
, A. Magnetic particle testing
B. Hydrostatic weighing
C. Temperature mapping
D. Pressure recording
Answer: A. Magnetic particle testing
Rationale: Magnetic particle testing can reveal surface and near-surface
discontinuities in ferromagnetic materials by creating magnetic leakage fields.
9. Which NDT method uses high-frequency sound waves?
A. Radiographic testing
B. Ultrasonic testing
C. Visual testing
D. Dye evaporation testing
Answer: B. Ultrasonic testing
Rationale: Ultrasonic testing uses high-frequency sound waves to detect internal
discontinuities and measure material thickness.
10.What is a major advantage of ultrasonic thickness measurement?
A. It normally requires removal of the vessel shell
B. It can measure wall thickness from one accessible surface
C. It permanently modifies the material
D. It only works on painted wood
Answer: B. It can measure wall thickness from one accessible surface
Rationale: Ultrasonic thickness gauges can determine remaining wall thickness
without cutting the vessel open, making them useful for corrosion monitoring.
11.What is the main purpose of a pressure relief valve?
A. Prevent excessive pressure from damaging the vessel
B. Increase operating pressure
