Pima Boiler Pressure Board Pressure Piping Inspector
Certification Examination Questions With Answers and
Explanations
Question 1. Why should the nominal inlet connection to a relief valve not be reduced arbitrarily below
the certified device inlet size?
A. Restriction can create excessive inlet pressure loss and prevent the valve from receiving the flow needed for stable
certified performance
B. A reduced inlet changes only the valve tag
C. The certified inlet size is cosmetic
D. A smaller inlet always improves capacity
Correct Answer: A. Restriction can create excessive inlet pressure loss and prevent the valve from receiving
the flow needed for stable certified performance
Explanation: The certified valve inlet and the connecting piping are part of the hydraulic path that supplies relieving flow.
An arbitrary reducer can add friction and dynamic loss immediately where the valve senses pressure. Excessive inlet loss
can cause instability, reduced lift, or inadequate capacity. Any inlet configuration must meet the governing code and device
manufacturer's design requirements.
Question 2. Which quality-control step is most appropriate when performing Time-of-flight diffraction
(TOFD) on pressure piping?
A. Validate focal laws, wedge and probe data, calibration, sensitivity, scan plan, encoded position, coverage, and
data-recording requirements
B. Establish probe separation, calibration, time base, sensitivity, scan coverage, and interpretation rules with awareness
of lateral and back-wall signals
C. Establish adequate field strength and direction, examine with at least the required field orientations, control particle
application and lighting, and demagnetize when specified
D. Define the test boundary and acceptance criteria, use calibrated instruments, control test pressure and temperature,
select a compatible medium, and establish safe exclusion measures
Correct Answer: B. Establish probe separation, calibration, time base, sensitivity, scan coverage, and
interpretation rules with awareness of lateral and back-wall signals
Explanation: The listed controls address the principal variables that determine the validity of Time-of-flight diffraction
(TOFD). They are important because the method uses separated transmitter and receiver probes to detect diffracted energy
from discontinuity tips and estimate through-wall height from signal time of flight. Without those controls, the examiner may
miss or mischaracterize conditions despite the method being nominally appropriate for detection and through-wall sizing of
many weld flaws, especially planar flaws, when used within a qualified weld-examination strategy. Inspection records
should document enough technique information for the result to be understood and, when necessary, repeated.
Page 1
,Pima Pressure Piping Inspector Certification Practice Examination 600 Questions
Question 3. What should an approved pressure-test package establish before pressurization begins?
A. Only the pipe paint color
B. Test boundary, medium, target pressure, temperature limits, instruments, temporary components, safety controls,
acceptance criteria, and responsible personnel
C. Only the start time
D. Only the pump model
Correct Answer: B. Test boundary, medium, target pressure, temperature limits, instruments, temporary
components, safety controls, acceptance criteria, and responsible personnel
Explanation: A pressure test is a controlled loading event and must be planned as an integrated system. The package
identifies what is being tested, how pressure will be applied and measured, and what items require isolation or temporary
restraint. Safety controls and acceptance criteria must be known before stored energy is introduced. An inspector should
walk down the actual field configuration against the approved package.
Question 4. An Arizona boiler suffers a pressure-boundary explosion without a fatality. How soon
must the Division generally be notified?
A. Within 72 hours
B. Within 24 hours
C. Within 10 calendar days
D. Only at the next certificate inspection
Correct Answer: B. Within 24 hours
Explanation: R20-5-410 requires notification to the Division within 24 hours for an explosion, severe overheating, or
personal injury involving covered equipment. Prompt notification preserves evidence and enables a timely jurisdictional
investigation. The duty is not limited to incidents involving fatalities. Waiting until the next scheduled inspection would not
satisfy the reporting requirement.
Question 5. What is a useful application of profile radiography in piping inspection?
A. Determining exact alloy chemistry
B. Calibrating pressure relief valves
C. Measuring pump vibration
D. Screening or measuring wall-loss profile in accessible geometries such as small-bore piping or localized corrosion
areas
Correct Answer: D. Screening or measuring wall-loss profile in accessible geometries such as small-bore
piping or localized corrosion areas
Explanation: Profile radiography can image the projected pipe-wall profile and reveal thinning, deposits, or internal features
in suitable geometries. It can be valuable where UT coupling or direct access is difficult, particularly for small-bore
components. Radiography does not identify alloy chemistry or mechanically calibrate valves. The inspector should
understand geometric magnification, sensitivity, radiation safety, and measurement limitations.
Page 2
,Pima Pressure Piping Inspector Certification Practice Examination 600 Questions
Question 6. When Arizona receives an application for a Special Inspector certificate, what initial
completeness-review period is stated in R20-5-420?
A. 24 hours
B. 30 days
C. 120 days
D. 7 days
Correct Answer: D. 7 days
Explanation: R20-5-420 provides a seven-day administrative completeness review for the Special Inspector application. If
information is missing, the Division gives written notice identifying what must be supplied. Administrative completeness is
distinct from substantive qualification for the certificate. The applicant must still hold the required National Board
commission and meet the applicable employment criteria.
Question 7. What is an alteration in pressure-piping integrity practice?
A. A physical change that affects the pressure-containing capability or design basis beyond a simple restoration to the
original condition
B. Routine painting
C. Replacing an identical gasket during maintenance
D. Cleaning dirt from a nameplate
Correct Answer: A. A physical change that affects the pressure-containing capability or design basis beyond a
simple restoration to the original condition
Explanation: An alteration changes the pressure-retaining item in a way that affects its original design configuration,
capacity, or pressure-temperature basis. Alterations typically require engineering, code review, inspection, and
documentation beyond ordinary maintenance. Like-for-like maintenance that does not change the design basis is generally
not treated as an alteration. The inspector should determine whether a proposed change modifies design conditions,
geometry, material, or pressure-retaining capability.
Question 8. Why does Arizona internal-inspection preparation require preventing leakage into a boiler
that is opened for examination?
A. To protect personnel and keep internal surfaces safely inspectable
B. To preserve steam pressure for the inspector
C. To make the boiler cool more slowly
D. To avoid having to isolate connected systems
Correct Answer: A. To protect personnel and keep internal surfaces safely inspectable
Explanation: Leakage of steam, hot water, chemicals, or other fluids into an opened boiler can create severe entry
hazards. Positive isolation and prevention of leakage are therefore fundamental parts of safe internal-inspection
preparation. Dry, accessible surfaces also allow the inspector to see deterioration that active leakage could obscure. The
requirement complements lockout, tagging, draining, cooling, and venting.
Page 3
, Pima Pressure Piping Inspector Certification Practice Examination 600 Questions
Question 9. What is a mixing point in a piping integrity context?
A. A pipe support that carries two lines
B. A location where insulation colors change
C. Any flange used to connect equal services
D. A location where streams of different composition or temperature combine and may create localized damage before
uniform mixing
Correct Answer: D. A location where streams of different composition or temperature combine and may create
localized damage before uniform mixing
Explanation: Mixing points can produce local chemistry, condensation, thermal gradients, turbulence, or phase behavior
different from the fully mixed downstream stream. These conditions may create localized corrosion, thermal fatigue, or other
damage mechanisms. A structural support or visual transition does not by itself define a process mixing point. The inspector
should identify the zone of influence and select methods capable of finding localized attack.
Question 10. An inspector observes the following condition: A small-bore instrument connection on a
reciprocating compressor line cracks repeatedly at the branch weld while wall thickness remains
nominal. Which damage mechanism is the best match?
A. Mechanical fatigue and vibration-induced fatigue
B. Sour-water corrosion
C. Atmospheric corrosion
D. Caustic stress-corrosion cracking
Correct Answer: A. Mechanical fatigue and vibration-induced fatigue
Explanation: The described material, environment, and damage pattern are characteristic of Mechanical fatigue and
vibration-induced fatigue. Repeated cyclic loading drives crack growth even when corrosion and static pressure are modest.
A suitable inspection response is to use close visual examination plus PT or MT for surface cracks and appropriate UT for
crack sizing where geometry permits. Risk reduction should emphasize measures such as reduce the vibration source,
change support or stiffness, remove resonance and stress concentration, and repair cracks under an approved plan.
Question 11. A hot steam flange was assembled with unidentified low-strength bolts because they fit
the holes. What is the proper disposition?
A. Require verification or replacement with bolting qualified for the design service
B. Increase steam pressure gradually to qualify them in service
C. Accept the bolts because dimensional fit proves strength
D. Rely on the gasket to carry the flange load
Correct Answer: A. Require verification or replacement with bolting qualified for the design service
Explanation: Physical fit does not establish the material properties or high-temperature strength required of pressure-joint
bolting. Flange bolting is a structural part of the joint and must have suitable strength, material compatibility, and
temperature capability. Inadequate bolting can relax, yield, or fracture and allow rapid joint leakage. The inspector should
confirm bolting specification, condition, lubrication or assembly procedure, and engagement as applicable.
Page 4
Certification Examination Questions With Answers and
Explanations
Question 1. Why should the nominal inlet connection to a relief valve not be reduced arbitrarily below
the certified device inlet size?
A. Restriction can create excessive inlet pressure loss and prevent the valve from receiving the flow needed for stable
certified performance
B. A reduced inlet changes only the valve tag
C. The certified inlet size is cosmetic
D. A smaller inlet always improves capacity
Correct Answer: A. Restriction can create excessive inlet pressure loss and prevent the valve from receiving
the flow needed for stable certified performance
Explanation: The certified valve inlet and the connecting piping are part of the hydraulic path that supplies relieving flow.
An arbitrary reducer can add friction and dynamic loss immediately where the valve senses pressure. Excessive inlet loss
can cause instability, reduced lift, or inadequate capacity. Any inlet configuration must meet the governing code and device
manufacturer's design requirements.
Question 2. Which quality-control step is most appropriate when performing Time-of-flight diffraction
(TOFD) on pressure piping?
A. Validate focal laws, wedge and probe data, calibration, sensitivity, scan plan, encoded position, coverage, and
data-recording requirements
B. Establish probe separation, calibration, time base, sensitivity, scan coverage, and interpretation rules with awareness
of lateral and back-wall signals
C. Establish adequate field strength and direction, examine with at least the required field orientations, control particle
application and lighting, and demagnetize when specified
D. Define the test boundary and acceptance criteria, use calibrated instruments, control test pressure and temperature,
select a compatible medium, and establish safe exclusion measures
Correct Answer: B. Establish probe separation, calibration, time base, sensitivity, scan coverage, and
interpretation rules with awareness of lateral and back-wall signals
Explanation: The listed controls address the principal variables that determine the validity of Time-of-flight diffraction
(TOFD). They are important because the method uses separated transmitter and receiver probes to detect diffracted energy
from discontinuity tips and estimate through-wall height from signal time of flight. Without those controls, the examiner may
miss or mischaracterize conditions despite the method being nominally appropriate for detection and through-wall sizing of
many weld flaws, especially planar flaws, when used within a qualified weld-examination strategy. Inspection records
should document enough technique information for the result to be understood and, when necessary, repeated.
Page 1
,Pima Pressure Piping Inspector Certification Practice Examination 600 Questions
Question 3. What should an approved pressure-test package establish before pressurization begins?
A. Only the pipe paint color
B. Test boundary, medium, target pressure, temperature limits, instruments, temporary components, safety controls,
acceptance criteria, and responsible personnel
C. Only the start time
D. Only the pump model
Correct Answer: B. Test boundary, medium, target pressure, temperature limits, instruments, temporary
components, safety controls, acceptance criteria, and responsible personnel
Explanation: A pressure test is a controlled loading event and must be planned as an integrated system. The package
identifies what is being tested, how pressure will be applied and measured, and what items require isolation or temporary
restraint. Safety controls and acceptance criteria must be known before stored energy is introduced. An inspector should
walk down the actual field configuration against the approved package.
Question 4. An Arizona boiler suffers a pressure-boundary explosion without a fatality. How soon
must the Division generally be notified?
A. Within 72 hours
B. Within 24 hours
C. Within 10 calendar days
D. Only at the next certificate inspection
Correct Answer: B. Within 24 hours
Explanation: R20-5-410 requires notification to the Division within 24 hours for an explosion, severe overheating, or
personal injury involving covered equipment. Prompt notification preserves evidence and enables a timely jurisdictional
investigation. The duty is not limited to incidents involving fatalities. Waiting until the next scheduled inspection would not
satisfy the reporting requirement.
Question 5. What is a useful application of profile radiography in piping inspection?
A. Determining exact alloy chemistry
B. Calibrating pressure relief valves
C. Measuring pump vibration
D. Screening or measuring wall-loss profile in accessible geometries such as small-bore piping or localized corrosion
areas
Correct Answer: D. Screening or measuring wall-loss profile in accessible geometries such as small-bore
piping or localized corrosion areas
Explanation: Profile radiography can image the projected pipe-wall profile and reveal thinning, deposits, or internal features
in suitable geometries. It can be valuable where UT coupling or direct access is difficult, particularly for small-bore
components. Radiography does not identify alloy chemistry or mechanically calibrate valves. The inspector should
understand geometric magnification, sensitivity, radiation safety, and measurement limitations.
Page 2
,Pima Pressure Piping Inspector Certification Practice Examination 600 Questions
Question 6. When Arizona receives an application for a Special Inspector certificate, what initial
completeness-review period is stated in R20-5-420?
A. 24 hours
B. 30 days
C. 120 days
D. 7 days
Correct Answer: D. 7 days
Explanation: R20-5-420 provides a seven-day administrative completeness review for the Special Inspector application. If
information is missing, the Division gives written notice identifying what must be supplied. Administrative completeness is
distinct from substantive qualification for the certificate. The applicant must still hold the required National Board
commission and meet the applicable employment criteria.
Question 7. What is an alteration in pressure-piping integrity practice?
A. A physical change that affects the pressure-containing capability or design basis beyond a simple restoration to the
original condition
B. Routine painting
C. Replacing an identical gasket during maintenance
D. Cleaning dirt from a nameplate
Correct Answer: A. A physical change that affects the pressure-containing capability or design basis beyond a
simple restoration to the original condition
Explanation: An alteration changes the pressure-retaining item in a way that affects its original design configuration,
capacity, or pressure-temperature basis. Alterations typically require engineering, code review, inspection, and
documentation beyond ordinary maintenance. Like-for-like maintenance that does not change the design basis is generally
not treated as an alteration. The inspector should determine whether a proposed change modifies design conditions,
geometry, material, or pressure-retaining capability.
Question 8. Why does Arizona internal-inspection preparation require preventing leakage into a boiler
that is opened for examination?
A. To protect personnel and keep internal surfaces safely inspectable
B. To preserve steam pressure for the inspector
C. To make the boiler cool more slowly
D. To avoid having to isolate connected systems
Correct Answer: A. To protect personnel and keep internal surfaces safely inspectable
Explanation: Leakage of steam, hot water, chemicals, or other fluids into an opened boiler can create severe entry
hazards. Positive isolation and prevention of leakage are therefore fundamental parts of safe internal-inspection
preparation. Dry, accessible surfaces also allow the inspector to see deterioration that active leakage could obscure. The
requirement complements lockout, tagging, draining, cooling, and venting.
Page 3
, Pima Pressure Piping Inspector Certification Practice Examination 600 Questions
Question 9. What is a mixing point in a piping integrity context?
A. A pipe support that carries two lines
B. A location where insulation colors change
C. Any flange used to connect equal services
D. A location where streams of different composition or temperature combine and may create localized damage before
uniform mixing
Correct Answer: D. A location where streams of different composition or temperature combine and may create
localized damage before uniform mixing
Explanation: Mixing points can produce local chemistry, condensation, thermal gradients, turbulence, or phase behavior
different from the fully mixed downstream stream. These conditions may create localized corrosion, thermal fatigue, or other
damage mechanisms. A structural support or visual transition does not by itself define a process mixing point. The inspector
should identify the zone of influence and select methods capable of finding localized attack.
Question 10. An inspector observes the following condition: A small-bore instrument connection on a
reciprocating compressor line cracks repeatedly at the branch weld while wall thickness remains
nominal. Which damage mechanism is the best match?
A. Mechanical fatigue and vibration-induced fatigue
B. Sour-water corrosion
C. Atmospheric corrosion
D. Caustic stress-corrosion cracking
Correct Answer: A. Mechanical fatigue and vibration-induced fatigue
Explanation: The described material, environment, and damage pattern are characteristic of Mechanical fatigue and
vibration-induced fatigue. Repeated cyclic loading drives crack growth even when corrosion and static pressure are modest.
A suitable inspection response is to use close visual examination plus PT or MT for surface cracks and appropriate UT for
crack sizing where geometry permits. Risk reduction should emphasize measures such as reduce the vibration source,
change support or stiffness, remove resonance and stress concentration, and repair cracks under an approved plan.
Question 11. A hot steam flange was assembled with unidentified low-strength bolts because they fit
the holes. What is the proper disposition?
A. Require verification or replacement with bolting qualified for the design service
B. Increase steam pressure gradually to qualify them in service
C. Accept the bolts because dimensional fit proves strength
D. Rely on the gasket to carry the flange load
Correct Answer: A. Require verification or replacement with bolting qualified for the design service
Explanation: Physical fit does not establish the material properties or high-temperature strength required of pressure-joint
bolting. Flange bolting is a structural part of the joint and must have suitable strength, material compatibility, and
temperature capability. Inadequate bolting can relax, yield, or fracture and allow rapid joint leakage. The inspector should
confirm bolting specification, condition, lubrication or assembly procedure, and engagement as applicable.
Page 4
