Pipefitter NCCER Test Exam Questions
and Answers 100% Solved
Convert 1/4 to its decimal equivalent.
A) .01
B) .25
C) 0.4
D) 0.5 - ✔✔B
Piping that is field-routed to a pump must be supported
A) Off the pump suction
B) Diagonally
C) Independently
D) Off the pump discharge - ✔✔C
What is used when lighting a cutting torch ?
A) Striker
B) Cigarette lighter
C) Match
D) Any open flame - ✔✔A
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,Where is specific information needed to install piping and associated items
found ?
A) Reliability network
B) Owner of the company
C) Material Manufacturer
D) Standards and Specifications - ✔✔D
Damaged and broken tools should be
A) Used if possible
B) Kept for backup
C) Taken out of Service
D) Used for minor tasks - ✔✔C
What is the ID of 10'' schedule 80 piping.
A) 9 3/16
B) 9 5/16
C) 9 9/16
D) 10 1/16 - ✔✔C
The two steps in making up threaded joints are the hand engagement and
A) Machine makeup
B) Wrench makeup
C) Driver makeup - ✔✔B
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,Which of the following actions should be taken before a hydrostatic test is
performed ?
A) Remove pressure relief valves
B) Leave control mechanisms in place
C) Leave orifice flanges in place
D) Remove blinds - ✔✔a
A 4-inch lateral riser is to be fabricated for a 6-inch pipe. How many
ordinate lines will
be needed to lay out this cut ?
A) 32
B) 16
C) 8
D) 4 - ✔✔C
Who is qualified to repair power tools.
A) Journey person
B) Competent Technician
C) Electrician
D) Tool crib attendant - ✔✔B
Which of the following plastic pipes is NOT joined by solvent welding ?
A) PVC
3
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, B) HDPE
C) CPVC
D) ABS - ✔✔B
Material placed in the bottom of the trench under the pipe to provide
support is called.
A) Heave
B) Sub trench
C) Trench load
D) Bedding - ✔✔D
Socket weld joints have a gap between the end of the pipe and the bottom
of the
socket. What is the purpose of this gap ?
A) Makes assembly easier
B) Reduces flexibility at the fitting
C) Prevents weld cracking
D) Provides fit-up adjustment - ✔✔C
When are rupture discs installed into a pipeline?
A) Before flushing and testing of pipeline
B) After installation of the pipeline
C) Before start-up of the system
4
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
and Answers 100% Solved
Convert 1/4 to its decimal equivalent.
A) .01
B) .25
C) 0.4
D) 0.5 - ✔✔B
Piping that is field-routed to a pump must be supported
A) Off the pump suction
B) Diagonally
C) Independently
D) Off the pump discharge - ✔✔C
What is used when lighting a cutting torch ?
A) Striker
B) Cigarette lighter
C) Match
D) Any open flame - ✔✔A
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,Where is specific information needed to install piping and associated items
found ?
A) Reliability network
B) Owner of the company
C) Material Manufacturer
D) Standards and Specifications - ✔✔D
Damaged and broken tools should be
A) Used if possible
B) Kept for backup
C) Taken out of Service
D) Used for minor tasks - ✔✔C
What is the ID of 10'' schedule 80 piping.
A) 9 3/16
B) 9 5/16
C) 9 9/16
D) 10 1/16 - ✔✔C
The two steps in making up threaded joints are the hand engagement and
A) Machine makeup
B) Wrench makeup
C) Driver makeup - ✔✔B
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,Which of the following actions should be taken before a hydrostatic test is
performed ?
A) Remove pressure relief valves
B) Leave control mechanisms in place
C) Leave orifice flanges in place
D) Remove blinds - ✔✔a
A 4-inch lateral riser is to be fabricated for a 6-inch pipe. How many
ordinate lines will
be needed to lay out this cut ?
A) 32
B) 16
C) 8
D) 4 - ✔✔C
Who is qualified to repair power tools.
A) Journey person
B) Competent Technician
C) Electrician
D) Tool crib attendant - ✔✔B
Which of the following plastic pipes is NOT joined by solvent welding ?
A) PVC
3
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, B) HDPE
C) CPVC
D) ABS - ✔✔B
Material placed in the bottom of the trench under the pipe to provide
support is called.
A) Heave
B) Sub trench
C) Trench load
D) Bedding - ✔✔D
Socket weld joints have a gap between the end of the pipe and the bottom
of the
socket. What is the purpose of this gap ?
A) Makes assembly easier
B) Reduces flexibility at the fitting
C) Prevents weld cracking
D) Provides fit-up adjustment - ✔✔C
When are rupture discs installed into a pipeline?
A) Before flushing and testing of pipeline
B) After installation of the pipeline
C) Before start-up of the system
4
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
