Pipefitter Star Exam Most Recent exam COMPLETE (2026) EXAM
Page | 1
Questions and Answers (Verified Answers) (Latest Update 2026)
Graded A+
1. A pipe labeled “SCH 80” refers to its:
A. Length
B. Outside diameter
C. Wall thickness schedule
D. Pressure rating
Rationale:
“Schedule” refers to wall thickness; higher schedule = thicker wall.
2. What is the takeoff for a 90° long-radius elbow?
A. Equal to pipe diameter
B. 1 × pipe radius
C. 1.5 × the nominal pipe size
D. 2 × the pipe diameter
Rationale:
LR elbows have a radius of 1.5 × NPS.
3. A socket-weld joint requires what preparation before welding?
A. Beveling
B. Threading
C. 1/16" expansion gap
D. No gap
4. Which tool is used to check pipe slope for drainage?
A. Pipe wrap
B. Feeler gauge
C. Torpedo level
D. Feeler level
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, 5. “NPS” stands for:
A. Nominal pipe section
B. Normal pressure standard
C. Nominal pipe size
Page | 2 D. National pipe schedule
6. Which flange type allows the pipe to be rotated for bolt alignment?
A. Socket weld
B. Slip-on
C. Weld neck
D. Orifice
7. A pipefitter uses a “center-to-end” dimension to:
A. Find pipe weight
B. Layout fittings
C. Cut threads
D. Calibrate levels
8. The purpose of a reducer is to:
A. Support piping
B. Change flow direction
C. Transition between two different diameters
D. Add pressure
9. Victaulic couplings are used for:
A. Welding only
B. Grooved piping systems
C. Solder systems
D. PVC only
10. The most accurate tool for pipe length measurements is the:
A. Folding rule
B. Steel tape
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, C. Cloth tape
D. Tadpole
11. What does “API 5L” refer to?
Page | 3
A. ASME boiler code
B. API fire rules
C. Line pipe specification
D. Pipe threading rules
12. You must NEVER use Teflon tape on:
A. Water lines
B. Steam lines
C. Instrument air fittings
D. Flanged joints
Rationale:
Flanged joints seal with gaskets, not tape.
13. A 45° elbow changes direction by:
A. 30 degrees
B. 45 degrees
C. 60 degrees
D. 90 degrees
14. A pipe thread is designated “NPT.” It means:
A. National pipe thread (tapered)
B. National parallel thread
C. Normal pipe type
D. North pipe taper
15. When installing valves, the arrow on the body indicates:
A. Temperature
B. Flow direction
C. Pressure
D. Seating depth
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, 16. A “hot tap” is used to:
A. Weld directly on stainless steel
B. Tap into a live pressurized line
Page | 4 C. Repair pipe schedules
D. Heat-treat welds
17. Pipe hangers must be spaced based on:
A. Pipe color
B. Pipe weight & diameter
C. Pipe manufacturer
D. Insulation thickness
18. What is the main advantage of a weld-neck flange?
A. Cheaper
B. Easiest to install
C. Best for high pressure & stress
D. Rotates freely
19. A pipefitter uses a “pipe wrap” for:
A. Cutting grooves
B. Making straight marks around pipe
C. Testing pressure
D. Leveling supports
20. Hydrostatic testing uses:
A. Air
B. Steam
C. Water
D. Nitrogen
21. A 2" schedule 40 pipe always has:
A. Same wall thickness as SCH 80
B. Same OD, different wall thickness
EXAMPREPMASTER
Page | 1
Questions and Answers (Verified Answers) (Latest Update 2026)
Graded A+
1. A pipe labeled “SCH 80” refers to its:
A. Length
B. Outside diameter
C. Wall thickness schedule
D. Pressure rating
Rationale:
“Schedule” refers to wall thickness; higher schedule = thicker wall.
2. What is the takeoff for a 90° long-radius elbow?
A. Equal to pipe diameter
B. 1 × pipe radius
C. 1.5 × the nominal pipe size
D. 2 × the pipe diameter
Rationale:
LR elbows have a radius of 1.5 × NPS.
3. A socket-weld joint requires what preparation before welding?
A. Beveling
B. Threading
C. 1/16" expansion gap
D. No gap
4. Which tool is used to check pipe slope for drainage?
A. Pipe wrap
B. Feeler gauge
C. Torpedo level
D. Feeler level
EXAMPREPMASTER
, 5. “NPS” stands for:
A. Nominal pipe section
B. Normal pressure standard
C. Nominal pipe size
Page | 2 D. National pipe schedule
6. Which flange type allows the pipe to be rotated for bolt alignment?
A. Socket weld
B. Slip-on
C. Weld neck
D. Orifice
7. A pipefitter uses a “center-to-end” dimension to:
A. Find pipe weight
B. Layout fittings
C. Cut threads
D. Calibrate levels
8. The purpose of a reducer is to:
A. Support piping
B. Change flow direction
C. Transition between two different diameters
D. Add pressure
9. Victaulic couplings are used for:
A. Welding only
B. Grooved piping systems
C. Solder systems
D. PVC only
10. The most accurate tool for pipe length measurements is the:
A. Folding rule
B. Steel tape
EXAMPREPMASTER
, C. Cloth tape
D. Tadpole
11. What does “API 5L” refer to?
Page | 3
A. ASME boiler code
B. API fire rules
C. Line pipe specification
D. Pipe threading rules
12. You must NEVER use Teflon tape on:
A. Water lines
B. Steam lines
C. Instrument air fittings
D. Flanged joints
Rationale:
Flanged joints seal with gaskets, not tape.
13. A 45° elbow changes direction by:
A. 30 degrees
B. 45 degrees
C. 60 degrees
D. 90 degrees
14. A pipe thread is designated “NPT.” It means:
A. National pipe thread (tapered)
B. National parallel thread
C. Normal pipe type
D. North pipe taper
15. When installing valves, the arrow on the body indicates:
A. Temperature
B. Flow direction
C. Pressure
D. Seating depth
EXAMPREPMASTER
, 16. A “hot tap” is used to:
A. Weld directly on stainless steel
B. Tap into a live pressurized line
Page | 4 C. Repair pipe schedules
D. Heat-treat welds
17. Pipe hangers must be spaced based on:
A. Pipe color
B. Pipe weight & diameter
C. Pipe manufacturer
D. Insulation thickness
18. What is the main advantage of a weld-neck flange?
A. Cheaper
B. Easiest to install
C. Best for high pressure & stress
D. Rotates freely
19. A pipefitter uses a “pipe wrap” for:
A. Cutting grooves
B. Making straight marks around pipe
C. Testing pressure
D. Leveling supports
20. Hydrostatic testing uses:
A. Air
B. Steam
C. Water
D. Nitrogen
21. A 2" schedule 40 pipe always has:
A. Same wall thickness as SCH 80
B. Same OD, different wall thickness
EXAMPREPMASTER
