Pipefitter Certification Test Bank 2025 With 400 Review Questions
and Correct Answers/ Pipefitter NCCER Test Prep Latest 2025-
2026/ NCCER Pipefitter Practice Exam 2025
What document would a pipefitter use to resolve a conflict with a specification or
standard? - ANSWER-RFI
All of the following types of pipes are thermoplastic EXCEPT.
A) Polyvinyl Chloride (PVC)
B) Fiberglass
C) Polyethylene
D) Acrylonitrile - Butadiene- Styrene - ANSWER-B
Which of the following is a classification of cast iron pipe?
A) Schedule 40
B) Schedule 80
C) XH
D) XS - ANSWER-C
What is the length of pipe required to fabricate a 6''diameter schedule 40 pipe spool
with one class 150# RFWN flange on one end, and one class 300# RFWN flange
on the other end, with a face-to-face measurement of 18 1/2'' (assume a 1/8 welder
gap)
A) 10 11/16
B) 10 7/8
C) 12 5/16
D) 12 1/2 - ANSWER-B
pg. 1
,At what dimension does a pipe begin to be measured by the outside diameter?
A) 8 inches
B) 10 inches
C) 12 inches
D) 14 inches - ANSWER-D
A piping drawing that shows both the side view and the top view of a piping
system is
A) Elevation
B) Isometric
C) Plan
D) Double-line - ANSWER-B
The movement of pipe that is caused by an increase in temperature is called
A) Hot spring
B) Thermal expansion
C) Heat swelling
D) Pipe stretching - ANSWER-B
A cold spring relieves
A) Cavitation
B) Water hammer
C) Thermal expansion
D) Tension - ANSWER-C
pg. 2
,How many feet apart must oxygen and fuel gas cylinders be stored, unless there is
a 5 ft high, 30 minute burn rated wall between them?
A) 5
B) 10
C) 15
D) 20 - ANSWER-D
When performing a line break, first?
A) Break the bolts down & away from you
B) Loosen each bolt a little at a time
C) Break the bolts closest to you
D) Loosen bolts in a cross over pattern - ANSWER-A
A pipe nipple is any length of threaded pipe that is shorter than
A) 12''
B) 13''
C) 14''
D) 15'' - ANSWER-A
What is the reference angle if the hypotenuse of a right triangle is 36'' and its
adjacent side is 14''. ( pipefitters blue book)
A) 79 degrees
B) 67 degrees
C) 23 degrees
D) 21 degrees - ANSWER-B
pg. 3
, In piping systems, ball joints are installed to allow for?
A) Expansion and Contraction
C) Pressure Relief
B) Chemical Absorption
D) Open & Closing - ANSWER-A
All of the following drawing dimensions are used to determine the overall length
of Run of a pipe EXCEPT.
A) Pipe diameter
B) Center-to-center
C) Face-to-face
D) Center-to-face - ANSWER-A
Ground fault circuit interrupters SHOULD be located
A) Closest to the power tool
B) At the source of power
C) On individual extension cords
D) On cords with only 3 prong connections - ANSWER-D
What is the most important hazardous condition in or around an excavation?
A) Falls
B) Water
C) Cave-In
D) Vibration - ANSWER-C
pg. 4
and Correct Answers/ Pipefitter NCCER Test Prep Latest 2025-
2026/ NCCER Pipefitter Practice Exam 2025
What document would a pipefitter use to resolve a conflict with a specification or
standard? - ANSWER-RFI
All of the following types of pipes are thermoplastic EXCEPT.
A) Polyvinyl Chloride (PVC)
B) Fiberglass
C) Polyethylene
D) Acrylonitrile - Butadiene- Styrene - ANSWER-B
Which of the following is a classification of cast iron pipe?
A) Schedule 40
B) Schedule 80
C) XH
D) XS - ANSWER-C
What is the length of pipe required to fabricate a 6''diameter schedule 40 pipe spool
with one class 150# RFWN flange on one end, and one class 300# RFWN flange
on the other end, with a face-to-face measurement of 18 1/2'' (assume a 1/8 welder
gap)
A) 10 11/16
B) 10 7/8
C) 12 5/16
D) 12 1/2 - ANSWER-B
pg. 1
,At what dimension does a pipe begin to be measured by the outside diameter?
A) 8 inches
B) 10 inches
C) 12 inches
D) 14 inches - ANSWER-D
A piping drawing that shows both the side view and the top view of a piping
system is
A) Elevation
B) Isometric
C) Plan
D) Double-line - ANSWER-B
The movement of pipe that is caused by an increase in temperature is called
A) Hot spring
B) Thermal expansion
C) Heat swelling
D) Pipe stretching - ANSWER-B
A cold spring relieves
A) Cavitation
B) Water hammer
C) Thermal expansion
D) Tension - ANSWER-C
pg. 2
,How many feet apart must oxygen and fuel gas cylinders be stored, unless there is
a 5 ft high, 30 minute burn rated wall between them?
A) 5
B) 10
C) 15
D) 20 - ANSWER-D
When performing a line break, first?
A) Break the bolts down & away from you
B) Loosen each bolt a little at a time
C) Break the bolts closest to you
D) Loosen bolts in a cross over pattern - ANSWER-A
A pipe nipple is any length of threaded pipe that is shorter than
A) 12''
B) 13''
C) 14''
D) 15'' - ANSWER-A
What is the reference angle if the hypotenuse of a right triangle is 36'' and its
adjacent side is 14''. ( pipefitters blue book)
A) 79 degrees
B) 67 degrees
C) 23 degrees
D) 21 degrees - ANSWER-B
pg. 3
, In piping systems, ball joints are installed to allow for?
A) Expansion and Contraction
C) Pressure Relief
B) Chemical Absorption
D) Open & Closing - ANSWER-A
All of the following drawing dimensions are used to determine the overall length
of Run of a pipe EXCEPT.
A) Pipe diameter
B) Center-to-center
C) Face-to-face
D) Center-to-face - ANSWER-A
Ground fault circuit interrupters SHOULD be located
A) Closest to the power tool
B) At the source of power
C) On individual extension cords
D) On cords with only 3 prong connections - ANSWER-D
What is the most important hazardous condition in or around an excavation?
A) Falls
B) Water
C) Cave-In
D) Vibration - ANSWER-C
pg. 4
