Pipefitter NCCER TEST PRACTICE EXAM
Questions And Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf.
Which of the following plastic pipes is NOT joined by solvent welding ?
A) PVC
B) HDPE
C) CPVC
D) ABS ✔️✔️CORRECT ANSWE✔️RSB
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 ✔️✔️CORRECT ANSWE✔️RSD
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 ✔️✔️CORRECT ANSWE✔️RSC
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
D) After start-up of the system ✔️✔️CORRECT ANSWE✔️RSC
Chain come-alongs are PRIMARILY designed for?
A) Lifting in close quarters
B) Vertical lifting
C) Lifting in any location
D) Horizontal lifting ✔️✔️CORRECT ANSWE✔️RSB
Which of the following types of copper tubing has the thickest wall
A) K
B) L
C) M
D) Acr ✔️✔️CORRECT ANSWE✔️RSA
What is the MINIMUM grade of chain that may be used for rigging
loads overhead?
,A) 5
B) 6
C) 7
D) 8 ✔️✔️CORRECT ANSWE✔️RSD
At and above what norminal pipe size is the O.D. of the pipe the same
as the norminal
size of the pipe.
A) 10''
B) 12''
C) 14''
D) 16'' ✔️✔️CORRECT ANSWE✔️RSC
Which type of field sketch has base lines that are 30 degrees to the
horizontal axis?
A) Orthographic
B) Oblique
C) P & ID
D) Isometric ✔️✔️CORRECT ANSWE✔️RSD
The MINIMUM number of pre-heat holes for liquefied fuel tips is
A) 2 C) 6
, B) 4 D) 8 ✔️✔️CORRECT ANSWE✔️RSC
The first step to changing blades and bits on power tools is to
A) Disassemble tool
B) Disconnect the power
C) Remove the guards
D) Get a new blade or bit ✔️✔️CORRECT ANSWE✔️RSB
What must be done to MOST socket welded valves before being
welded into place?
A) Close the valve completely
B) Close the valve halfway
C) Open the valve completely
D) Cover the end of the valve ✔️✔️CORRECT ANSWE✔️RSC
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
Questions And Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf.
Which of the following plastic pipes is NOT joined by solvent welding ?
A) PVC
B) HDPE
C) CPVC
D) ABS ✔️✔️CORRECT ANSWE✔️RSB
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 ✔️✔️CORRECT ANSWE✔️RSD
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 ✔️✔️CORRECT ANSWE✔️RSC
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
D) After start-up of the system ✔️✔️CORRECT ANSWE✔️RSC
Chain come-alongs are PRIMARILY designed for?
A) Lifting in close quarters
B) Vertical lifting
C) Lifting in any location
D) Horizontal lifting ✔️✔️CORRECT ANSWE✔️RSB
Which of the following types of copper tubing has the thickest wall
A) K
B) L
C) M
D) Acr ✔️✔️CORRECT ANSWE✔️RSA
What is the MINIMUM grade of chain that may be used for rigging
loads overhead?
,A) 5
B) 6
C) 7
D) 8 ✔️✔️CORRECT ANSWE✔️RSD
At and above what norminal pipe size is the O.D. of the pipe the same
as the norminal
size of the pipe.
A) 10''
B) 12''
C) 14''
D) 16'' ✔️✔️CORRECT ANSWE✔️RSC
Which type of field sketch has base lines that are 30 degrees to the
horizontal axis?
A) Orthographic
B) Oblique
C) P & ID
D) Isometric ✔️✔️CORRECT ANSWE✔️RSD
The MINIMUM number of pre-heat holes for liquefied fuel tips is
A) 2 C) 6
, B) 4 D) 8 ✔️✔️CORRECT ANSWE✔️RSC
The first step to changing blades and bits on power tools is to
A) Disassemble tool
B) Disconnect the power
C) Remove the guards
D) Get a new blade or bit ✔️✔️CORRECT ANSWE✔️RSB
What must be done to MOST socket welded valves before being
welded into place?
A) Close the valve completely
B) Close the valve halfway
C) Open the valve completely
D) Cover the end of the valve ✔️✔️CORRECT ANSWE✔️RSC
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
