UA STAR PIPEFITTER CERTIFICATION
PRACTICE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
| INSTANT DOWNLOAD PDF
1. What is the primary purpose of a pipefitter installing piping systems?
A. To landscape the site
B. To install electrical wiring
C. To install, align and join pipe systems
D. To lay concrete
Rationale: Pipefitters are trained to install, align, and join piping systems for
fluid transport.
2. Which of the following is a standard pipe material used in high-pressure
steam systems?
A. PVC
B. CPVC
C. Carbon Steel
D. Polyethylene
Rationale: Carbon steel is commonly used in high-temperature, high-pressure
steam piping.
,3. Which welding process is most commonly used in pipefitting for structural
integrity?
A. TIG
B. SMAW (Stick Welding)
C. Oxy-acetylene only
D. Brazing
Rationale: SMAW is widely used in pipefitting for its portability and strength.
4. What is the term for the allowable variation in pipe length before fabrication?
A. Alignment tolerance
B. Fit-up tolerance
C. Weld gap
D. Adjustment variance
Rationale: Fit-up tolerance refers to the allowable variation during assembly.
5. What is the purpose of a pipe support?
A. To restrict movement completely
B. To increase heat loss
C. To secure and support piping while allowing thermal expansion
D. To stop flow
Rationale: Supports secure piping and accommodate movements from
temperature changes.
6. What tool is used to cut threads on pipe?
A. Hacksaw only
B. Pipe die
C. Grinder
, D. Tape measure
Rationale: A pipe die cuts external threads on pipe ends.
7. Which schedule represents the wall thickness of a pipe?
A. Grade
B. PSI
C. Schedule number (e.g., SCH 40)
D. Temperature rating
Rationale: Pipe schedule numbers indicate wall thickness.
8. What must be done before welding galvanized pipe?
A. Paint it
B. Increase preheat temperature
C. Remove the zinc coating from the weld area
D. Add flux
Rationale: Zinc coating must be removed to avoid toxic fumes and poor weld
quality.
9. What is the most common layout method for field fabrication?
A. Triangulation
B. Flow charting
C. Ratio method
D. Phase scheduling
Rationale: Triangulation is frequently used to determine exact lengths and
angles in the field.
10. In a piping system drawing, the letters “NPS” stand for:
PRACTICE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
| INSTANT DOWNLOAD PDF
1. What is the primary purpose of a pipefitter installing piping systems?
A. To landscape the site
B. To install electrical wiring
C. To install, align and join pipe systems
D. To lay concrete
Rationale: Pipefitters are trained to install, align, and join piping systems for
fluid transport.
2. Which of the following is a standard pipe material used in high-pressure
steam systems?
A. PVC
B. CPVC
C. Carbon Steel
D. Polyethylene
Rationale: Carbon steel is commonly used in high-temperature, high-pressure
steam piping.
,3. Which welding process is most commonly used in pipefitting for structural
integrity?
A. TIG
B. SMAW (Stick Welding)
C. Oxy-acetylene only
D. Brazing
Rationale: SMAW is widely used in pipefitting for its portability and strength.
4. What is the term for the allowable variation in pipe length before fabrication?
A. Alignment tolerance
B. Fit-up tolerance
C. Weld gap
D. Adjustment variance
Rationale: Fit-up tolerance refers to the allowable variation during assembly.
5. What is the purpose of a pipe support?
A. To restrict movement completely
B. To increase heat loss
C. To secure and support piping while allowing thermal expansion
D. To stop flow
Rationale: Supports secure piping and accommodate movements from
temperature changes.
6. What tool is used to cut threads on pipe?
A. Hacksaw only
B. Pipe die
C. Grinder
, D. Tape measure
Rationale: A pipe die cuts external threads on pipe ends.
7. Which schedule represents the wall thickness of a pipe?
A. Grade
B. PSI
C. Schedule number (e.g., SCH 40)
D. Temperature rating
Rationale: Pipe schedule numbers indicate wall thickness.
8. What must be done before welding galvanized pipe?
A. Paint it
B. Increase preheat temperature
C. Remove the zinc coating from the weld area
D. Add flux
Rationale: Zinc coating must be removed to avoid toxic fumes and poor weld
quality.
9. What is the most common layout method for field fabrication?
A. Triangulation
B. Flow charting
C. Ratio method
D. Phase scheduling
Rationale: Triangulation is frequently used to determine exact lengths and
angles in the field.
10. In a piping system drawing, the letters “NPS” stand for:
