UA STAR Pipefitter Certification Exam
With Actual Questions & Verified
Answers, Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Updated/Instant Download Pdf
1. What is the primary purpose of a pipefitter in industrial settings?
A. Electrical wiring installation
B. Installing and maintaining piping systems
C. Operating heavy machinery
D. Welding metal structures
B. Installing and maintaining piping systems
Rationale: Pipefitters specialize in the installation, maintenance, and
repair of piping systems that carry liquids, gases, and other materials
in industrial and commercial settings.
2. Which type of pipe is commonly used for high-pressure steam
applications?
A. PVC
B. CPVC
C. Black steel
D. Copper
,C. Black steel
Rationale: Black steel pipe is preferred for high-pressure steam
because of its strength, heat tolerance, and durability under pressure.
3. When measuring pipe for cutting, what should always be
considered?
A. Pipe color
B. Wall thickness and cut length
C. Pipe weight
D. Type of pipe lubricant
B. Wall thickness and cut length
Rationale: Accurate measurement includes considering the wall
thickness and the required cut length to ensure proper fit and weld
integrity.
4. Which fitting is used to change the direction of a pipe by 90
degrees?
A. Coupling
B. Elbow
C. Tee
D. Reducer
B. Elbow
Rationale: Elbows are fittings designed to change the direction of a
pipe, typically available in 45° or 90° angles.
5. What is the purpose of a pipe support?
A. To reduce water flow
B. To prevent sagging and maintain alignment
C. To seal leaks
D. To increase pressure
,B. To prevent sagging and maintain alignment
Rationale: Pipe supports maintain proper alignment and prevent
sagging or movement that can stress joints or connections.
6. When threading a steel pipe, what is applied to the threads to
ensure a proper seal?
A. Oil only
B. Thread sealant or Teflon tape
C. Water
D. Grease
B. Thread sealant or Teflon tape
Rationale: Sealants or tape are used on threaded connections to
prevent leaks while allowing a secure mechanical joint.
7. What is the typical schedule designation for high-pressure steel
pipe?
A. Schedule 10
B. Schedule 40
C. Schedule 80
D. Schedule 160
C. Schedule 80
Rationale: Schedule 80 steel pipe has thicker walls than Schedule 40,
making it suitable for higher-pressure applications.
8. Which welding process is commonly used in pipefitting?
A. MIG welding
B. TIG welding
C. Stick welding
D. All of the above
, D. All of the above
Rationale: Pipefitters may use MIG, TIG, or stick welding depending
on the material, pipe size, and job requirements.
9. In reading blueprints, what does a dashed line typically indicate?
A. Existing pipe
B. Hidden or future pipe
C. Electrical conduit
D. Floor plan
B. Hidden or future pipe
Rationale: Dashed lines often represent pipes that are concealed
behind walls or planned for future installation.
10. What is the function of a flange in a piping system?
A. To join two pipes together
B. To regulate pressure
C. To measure flow
D. To filter debris
A. To join two pipes together
Rationale: Flanges provide a secure method to connect pipes, valves,
or equipment, allowing for disassembly for maintenance.
11. When bending metal pipe, which tool is commonly used?
A. Pipe cutter
B. Pipe bender
C. Welder
D. Threading die
B. Pipe bender
Rationale: A pipe bender allows for precise bending of metal pipe
without kinking or damaging the material.
With Actual Questions & Verified
Answers, Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Updated/Instant Download Pdf
1. What is the primary purpose of a pipefitter in industrial settings?
A. Electrical wiring installation
B. Installing and maintaining piping systems
C. Operating heavy machinery
D. Welding metal structures
B. Installing and maintaining piping systems
Rationale: Pipefitters specialize in the installation, maintenance, and
repair of piping systems that carry liquids, gases, and other materials
in industrial and commercial settings.
2. Which type of pipe is commonly used for high-pressure steam
applications?
A. PVC
B. CPVC
C. Black steel
D. Copper
,C. Black steel
Rationale: Black steel pipe is preferred for high-pressure steam
because of its strength, heat tolerance, and durability under pressure.
3. When measuring pipe for cutting, what should always be
considered?
A. Pipe color
B. Wall thickness and cut length
C. Pipe weight
D. Type of pipe lubricant
B. Wall thickness and cut length
Rationale: Accurate measurement includes considering the wall
thickness and the required cut length to ensure proper fit and weld
integrity.
4. Which fitting is used to change the direction of a pipe by 90
degrees?
A. Coupling
B. Elbow
C. Tee
D. Reducer
B. Elbow
Rationale: Elbows are fittings designed to change the direction of a
pipe, typically available in 45° or 90° angles.
5. What is the purpose of a pipe support?
A. To reduce water flow
B. To prevent sagging and maintain alignment
C. To seal leaks
D. To increase pressure
,B. To prevent sagging and maintain alignment
Rationale: Pipe supports maintain proper alignment and prevent
sagging or movement that can stress joints or connections.
6. When threading a steel pipe, what is applied to the threads to
ensure a proper seal?
A. Oil only
B. Thread sealant or Teflon tape
C. Water
D. Grease
B. Thread sealant or Teflon tape
Rationale: Sealants or tape are used on threaded connections to
prevent leaks while allowing a secure mechanical joint.
7. What is the typical schedule designation for high-pressure steel
pipe?
A. Schedule 10
B. Schedule 40
C. Schedule 80
D. Schedule 160
C. Schedule 80
Rationale: Schedule 80 steel pipe has thicker walls than Schedule 40,
making it suitable for higher-pressure applications.
8. Which welding process is commonly used in pipefitting?
A. MIG welding
B. TIG welding
C. Stick welding
D. All of the above
, D. All of the above
Rationale: Pipefitters may use MIG, TIG, or stick welding depending
on the material, pipe size, and job requirements.
9. In reading blueprints, what does a dashed line typically indicate?
A. Existing pipe
B. Hidden or future pipe
C. Electrical conduit
D. Floor plan
B. Hidden or future pipe
Rationale: Dashed lines often represent pipes that are concealed
behind walls or planned for future installation.
10. What is the function of a flange in a piping system?
A. To join two pipes together
B. To regulate pressure
C. To measure flow
D. To filter debris
A. To join two pipes together
Rationale: Flanges provide a secure method to connect pipes, valves,
or equipment, allowing for disassembly for maintenance.
11. When bending metal pipe, which tool is commonly used?
A. Pipe cutter
B. Pipe bender
C. Welder
D. Threading die
B. Pipe bender
Rationale: A pipe bender allows for precise bending of metal pipe
without kinking or damaging the material.
