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Oklahoma (OK) Process Piping Journeyman
Exam | Latest Verified Questions and
Detailed Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple choice questions is designed for the Oklahoma (OK)
Process Piping Journeyman Exam, a state-approved, open-book test administered by PSI.
The exam evaluates a candidate’s knowledge of industrial piping systems conveying
process fluids (gases, liquids, slurries) across core subjects including ASME B31.3 code
definitions, interpretation of isometric drawings and schematics, selection of pipe
materials based on pressure-temperature ratings, joining methods and installation
practices, hanger and support requirements, valve types and applications, and OSHA
workplace safety standards. Eligibility requires a minimum of three years of verifiable
experience and successful pre-approval by the Oklahoma Construction Industries Board
(CIB) prior to registering for the examination.
QUESTION 1
What does ASME B31.3 govern?
A) Power boiler piping
B) Building services plumbing
C) Process piping in petroleum refineries, chemical plants, and similar facilities
D) Fuel gas piping in residential buildings
CORRECT ANSWER: C
EXPERT RATIONALE: ASME B31.3 is the Process Piping Code, covering piping for fluids
including chemicals, petroleum, and gases in industrial facilities. B31.1 covers power
piping, while B31.9 is for building services.
QUESTION 2
Which of the following is considered process piping?
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A) Domestic hot water piping inside a commercial kitchen
B) High-pressure steam piping in a power plant
C) Slurry transport piping in a mine processing plant
D) Sanitary sewer piping under a public street
CORRECT ANSWER: C
EXPERT RATIONALE: Process piping conveys fluids that are part of an industrial process,
such as slurries in mineral processing. Domestic water and sanitary piping are typically
plumbing, not process piping under B31.3.
QUESTION 3
In isometric drawings, a single line with three 30° offset axes is used to represent:
A) A section view
B) A plan view
C) A three-dimensional piping layout
D) An electrical wiring schematic
CORRECT ANSWER: C
EXPERT RATIONALE: Piping isometric drawings use 30° angles to show all three axes in
one view, aiding fabrication and erection. It is not a section or plan view.
QUESTION 4
A piping specification calls for ASTM A106 Grade B. What type of pipe does this denote?
A) Carbon steel seamless pipe for high-temperature service
B) Stainless steel welded pipe
C) PVC schedule 80 pipe
D) Copper tubing
CORRECT ANSWER: A
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EXPERT RATIONALE: ASTM A106 is the standard specification for seamless carbon steel
pipe for high-temperature service. Grade B is the most common grade with a specified
minimum yield strength.
QUESTION 5
When threading carbon steel pipe, what is the recommended sealant or compound
applied to the threads?
A) Silicone caulk
B) PTFE tape or pipe dope suitable for the service
C) Graphite grease only
D) No sealant is needed on tapered threads
CORRECT ANSWER: B
EXPERT RATIONALE: Threaded joints on carbon steel process piping require a joint
compound such as PTFE tape or approved pipe dope to prevent leakage, compatible
with the process fluid. Tapered threads alone do not guarantee a seal.
QUESTION 6
What is the primary function of a pipe hanger?
A) To reduce noise
B) To provide alignment during welding
C) To carry the weight of the piping and its contents
D) To direct expansion movement
CORRECT ANSWER: C
EXPERT RATIONALE: Pipe hangers and supports carry the dead weight of the pipe,
insulation, and fluid. Alignment is done by temporary clamps, and expansion is
managed by guides and anchors.
, 4|Page
QUESTION 7
A gate valve is best suited for which service?
A) Throttling flow
B) Frequent on/off cycling
C) Full-port on/off isolation with minimal pressure drop
D) Preventing reverse flow
CORRECT ANSWER: C
EXPERT RATIONALE: Gate valves provide straight-through flow with minimal resistance
when fully open and are used for isolation, not throttling. Globe valves are preferred for
throttling.
QUESTION 8
According to OSHA, at what height must a worker be protected from falls when working
on a pipe rack with open sides?
A) 4 feet in general industry
B) 6 feet in all cases
C) 10 feet regardless of industry
D) 15 feet only when near edges
CORRECT ANSWER: A
EXPERT RATIONALE: OSHA 1910 (general industry) requires fall protection at 4 feet.
Construction (1926) requires it at 6 feet, but process piping maintenance often falls
under general industry if not new construction.
QUESTION 9
Which material listed has the highest maximum continuous service temperature?
A) PVC
B) CPVC
Oklahoma (OK) Process Piping Journeyman
Exam | Latest Verified Questions and
Detailed Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple choice questions is designed for the Oklahoma (OK)
Process Piping Journeyman Exam, a state-approved, open-book test administered by PSI.
The exam evaluates a candidate’s knowledge of industrial piping systems conveying
process fluids (gases, liquids, slurries) across core subjects including ASME B31.3 code
definitions, interpretation of isometric drawings and schematics, selection of pipe
materials based on pressure-temperature ratings, joining methods and installation
practices, hanger and support requirements, valve types and applications, and OSHA
workplace safety standards. Eligibility requires a minimum of three years of verifiable
experience and successful pre-approval by the Oklahoma Construction Industries Board
(CIB) prior to registering for the examination.
QUESTION 1
What does ASME B31.3 govern?
A) Power boiler piping
B) Building services plumbing
C) Process piping in petroleum refineries, chemical plants, and similar facilities
D) Fuel gas piping in residential buildings
CORRECT ANSWER: C
EXPERT RATIONALE: ASME B31.3 is the Process Piping Code, covering piping for fluids
including chemicals, petroleum, and gases in industrial facilities. B31.1 covers power
piping, while B31.9 is for building services.
QUESTION 2
Which of the following is considered process piping?
,2|Page
A) Domestic hot water piping inside a commercial kitchen
B) High-pressure steam piping in a power plant
C) Slurry transport piping in a mine processing plant
D) Sanitary sewer piping under a public street
CORRECT ANSWER: C
EXPERT RATIONALE: Process piping conveys fluids that are part of an industrial process,
such as slurries in mineral processing. Domestic water and sanitary piping are typically
plumbing, not process piping under B31.3.
QUESTION 3
In isometric drawings, a single line with three 30° offset axes is used to represent:
A) A section view
B) A plan view
C) A three-dimensional piping layout
D) An electrical wiring schematic
CORRECT ANSWER: C
EXPERT RATIONALE: Piping isometric drawings use 30° angles to show all three axes in
one view, aiding fabrication and erection. It is not a section or plan view.
QUESTION 4
A piping specification calls for ASTM A106 Grade B. What type of pipe does this denote?
A) Carbon steel seamless pipe for high-temperature service
B) Stainless steel welded pipe
C) PVC schedule 80 pipe
D) Copper tubing
CORRECT ANSWER: A
,3|Page
EXPERT RATIONALE: ASTM A106 is the standard specification for seamless carbon steel
pipe for high-temperature service. Grade B is the most common grade with a specified
minimum yield strength.
QUESTION 5
When threading carbon steel pipe, what is the recommended sealant or compound
applied to the threads?
A) Silicone caulk
B) PTFE tape or pipe dope suitable for the service
C) Graphite grease only
D) No sealant is needed on tapered threads
CORRECT ANSWER: B
EXPERT RATIONALE: Threaded joints on carbon steel process piping require a joint
compound such as PTFE tape or approved pipe dope to prevent leakage, compatible
with the process fluid. Tapered threads alone do not guarantee a seal.
QUESTION 6
What is the primary function of a pipe hanger?
A) To reduce noise
B) To provide alignment during welding
C) To carry the weight of the piping and its contents
D) To direct expansion movement
CORRECT ANSWER: C
EXPERT RATIONALE: Pipe hangers and supports carry the dead weight of the pipe,
insulation, and fluid. Alignment is done by temporary clamps, and expansion is
managed by guides and anchors.
, 4|Page
QUESTION 7
A gate valve is best suited for which service?
A) Throttling flow
B) Frequent on/off cycling
C) Full-port on/off isolation with minimal pressure drop
D) Preventing reverse flow
CORRECT ANSWER: C
EXPERT RATIONALE: Gate valves provide straight-through flow with minimal resistance
when fully open and are used for isolation, not throttling. Globe valves are preferred for
throttling.
QUESTION 8
According to OSHA, at what height must a worker be protected from falls when working
on a pipe rack with open sides?
A) 4 feet in general industry
B) 6 feet in all cases
C) 10 feet regardless of industry
D) 15 feet only when near edges
CORRECT ANSWER: A
EXPERT RATIONALE: OSHA 1910 (general industry) requires fall protection at 4 feet.
Construction (1926) requires it at 6 feet, but process piping maintenance often falls
under general industry if not new construction.
QUESTION 9
Which material listed has the highest maximum continuous service temperature?
A) PVC
B) CPVC
