OKLAHOMA PROCESS PIPING JOURNEYMAN EXAM –
QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE | EXAM
PREP | STUDY GUIDE | PRACTICE TEST
1. A process piping system is being installed to
transport high-pressure steam. Which material is most
commonly required for the pipe wall to handle the
thermal expansion and pressure stresses?
A. PVC
B. Carbon Steel (ASTM A106 Grade B)
C. Copper Type M
D. Polyethylene
════════════════════
Correct Answer: B. Carbon Steel (ASTM A106 Grade
B)
Rationale: Carbon steel, particularly A106 Grade B, is
the standard for high-pressure and high-temperature
steam applications due to its tensile strength and
thermal stability. PVC and polyethylene would melt or
fail under steam conditions, and Type M copper is not
rated for high-pressure steam systems.
2. When preparing a pipe end for a butt-weld
connection, what is the standard included angle for the
bevel?
A. 15 degrees
B. 37.5 degrees
C. 60 degrees
D. 90 degrees
,════════════════════
Correct Answer: B. 37.5 degrees
Rationale: A 37.5-degree bevel (resulting in a 75-
degree included angle) is the industry standard for butt-
weld pipe ends, providing the optimal surface area for
weld penetration while minimizing filler metal
consumption.
3. Which valve type is specifically designed to prevent
backflow in a piping system?
A. Gate valve
B. Globe valve
C. Check valve
D. Butterfly valve
════════════════════
Correct Answer: C. Check valve
Rationale: A check valve is an automatic valve that
allows flow in one direction and mechanically prevents
backflow. Gate, globe, and butterfly valves are primarily
for isolation or throttling and do not provide automatic
backflow protection.
4. You are measuring a piping offset. The travel is 14
inches and the set is 10 inches. What is the run of this
offset?
A. 8.54 inches
B. 9.80 inches
C. 17.20 inches
D. 24.00 inches
════════════════════
Correct Answer: B. 9.80 inches
Rationale: Using the Pythagorean theorem (a² + b² =
c²), where travel is the hypotenuse (c) and set is one leg
,(a): Run = 142 − 102 = 196 − 100 = 96 ≈ 9.797
inches.
5. In a high-purity process environment, what is the
preferred method for joining stainless steel tubing?
A. Soldering
B. Threading
C. Orbital TIG welding
D. Flaring
════════════════════
Correct Answer: C. Orbital TIG welding
Rationale: Orbital TIG welding provides a
consistent, high-quality, crevice-free internal weld
necessary for high-purity or sanitary process systems.
Threading creates crevices where contaminants can
build up, and soldering is insufficient for most high-
pressure process systems.
6. Which component is used to absorb thermal
expansion and contraction in long piping runs?
A. Reducer
B. Expansion loop
C. Blind flange
D. Reducing tee
════════════════════
Correct Answer: B. Expansion loop
Rationale: Expansion loops are specifically
engineered sections of piping that allow for flexibility,
absorbing the mechanical stresses caused by
temperature-induced expansion and contraction to
prevent pipe buckling or joint failure.
, 7. What is the primary purpose of a "spectacle blind" in
a process piping system?
A. To restrict flow at a specific rate
B. To provide a positive shut-off for maintenance
C. To increase pressure in the line
D. To act as a pressure relief valve
════════════════════
Correct Answer: B. To provide a positive shut-off for
maintenance
Rationale: A spectacle blind consists of a solid plate
and an open ring. It is installed between flanges to
provide absolute isolation (positive shut-off) during
maintenance, ensuring no fluids can enter the isolated
section.
8. Which document typically outlines the specific piping
materials, valves, and fittings for a project?
A. Piping and Instrumentation Diagram (P&ID)
B. Piping Material Specification (PMS)
C. Isometric Drawing
D. General Arrangement Drawing
════════════════════
Correct Answer: B. Piping Material Specification
(PMS)
Rationale: The Piping Material Specification (PMS)
acts as the master reference document for a project,
defining the specific codes, classes, and materials (e.g.,
carbon steel, stainless steel) required for various
services.
9. A pipe is designated as "Schedule 40." What does the
schedule number primarily indicate?
A. The outside diameter
QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE | EXAM
PREP | STUDY GUIDE | PRACTICE TEST
1. A process piping system is being installed to
transport high-pressure steam. Which material is most
commonly required for the pipe wall to handle the
thermal expansion and pressure stresses?
A. PVC
B. Carbon Steel (ASTM A106 Grade B)
C. Copper Type M
D. Polyethylene
════════════════════
Correct Answer: B. Carbon Steel (ASTM A106 Grade
B)
Rationale: Carbon steel, particularly A106 Grade B, is
the standard for high-pressure and high-temperature
steam applications due to its tensile strength and
thermal stability. PVC and polyethylene would melt or
fail under steam conditions, and Type M copper is not
rated for high-pressure steam systems.
2. When preparing a pipe end for a butt-weld
connection, what is the standard included angle for the
bevel?
A. 15 degrees
B. 37.5 degrees
C. 60 degrees
D. 90 degrees
,════════════════════
Correct Answer: B. 37.5 degrees
Rationale: A 37.5-degree bevel (resulting in a 75-
degree included angle) is the industry standard for butt-
weld pipe ends, providing the optimal surface area for
weld penetration while minimizing filler metal
consumption.
3. Which valve type is specifically designed to prevent
backflow in a piping system?
A. Gate valve
B. Globe valve
C. Check valve
D. Butterfly valve
════════════════════
Correct Answer: C. Check valve
Rationale: A check valve is an automatic valve that
allows flow in one direction and mechanically prevents
backflow. Gate, globe, and butterfly valves are primarily
for isolation or throttling and do not provide automatic
backflow protection.
4. You are measuring a piping offset. The travel is 14
inches and the set is 10 inches. What is the run of this
offset?
A. 8.54 inches
B. 9.80 inches
C. 17.20 inches
D. 24.00 inches
════════════════════
Correct Answer: B. 9.80 inches
Rationale: Using the Pythagorean theorem (a² + b² =
c²), where travel is the hypotenuse (c) and set is one leg
,(a): Run = 142 − 102 = 196 − 100 = 96 ≈ 9.797
inches.
5. In a high-purity process environment, what is the
preferred method for joining stainless steel tubing?
A. Soldering
B. Threading
C. Orbital TIG welding
D. Flaring
════════════════════
Correct Answer: C. Orbital TIG welding
Rationale: Orbital TIG welding provides a
consistent, high-quality, crevice-free internal weld
necessary for high-purity or sanitary process systems.
Threading creates crevices where contaminants can
build up, and soldering is insufficient for most high-
pressure process systems.
6. Which component is used to absorb thermal
expansion and contraction in long piping runs?
A. Reducer
B. Expansion loop
C. Blind flange
D. Reducing tee
════════════════════
Correct Answer: B. Expansion loop
Rationale: Expansion loops are specifically
engineered sections of piping that allow for flexibility,
absorbing the mechanical stresses caused by
temperature-induced expansion and contraction to
prevent pipe buckling or joint failure.
, 7. What is the primary purpose of a "spectacle blind" in
a process piping system?
A. To restrict flow at a specific rate
B. To provide a positive shut-off for maintenance
C. To increase pressure in the line
D. To act as a pressure relief valve
════════════════════
Correct Answer: B. To provide a positive shut-off for
maintenance
Rationale: A spectacle blind consists of a solid plate
and an open ring. It is installed between flanges to
provide absolute isolation (positive shut-off) during
maintenance, ensuring no fluids can enter the isolated
section.
8. Which document typically outlines the specific piping
materials, valves, and fittings for a project?
A. Piping and Instrumentation Diagram (P&ID)
B. Piping Material Specification (PMS)
C. Isometric Drawing
D. General Arrangement Drawing
════════════════════
Correct Answer: B. Piping Material Specification
(PMS)
Rationale: The Piping Material Specification (PMS)
acts as the master reference document for a project,
defining the specific codes, classes, and materials (e.g.,
carbon steel, stainless steel) required for various
services.
9. A pipe is designated as "Schedule 40." What does the
schedule number primarily indicate?
A. The outside diameter
