ASME B31.3 Process Piping Exam 2026 | Practice Questions &
Verified Answers | Process Piping Code Certification Prep
1. What is the minimum wall schedule that can be used in a male threaded joint
in normal fluid service, carbon steel (notch-sensitive) and NPS 1.5 and smaller?
a. Sch 10
b. Sch 40
c. Sch 80
d. Sch 160
2. What is an example of a straight-threaded joint?
a. threads (male) of threaded piping
b. threads (female) on a threaded valve
c. an union comprising male and female ends joined with a threaded union nut
d. a joint used in instrument tubing
3. Determine the linear expansion (in/100ft) of a carbon steel pipe between 70
degrees F. and 450 degrees F.
a. 3.04” per 100 ft
b. 3.39” per 100 ft
c. 2.93” per 100 ft
d. 3.16” per 100 ft
4. A 20’ long carbon steel pipe is heated uniformly to 450 degrees F . from 70 degrees F.
Determine its length after heating.
a. 20.052’
b. 20.263’
c. 20.210’
d. 20.250’
5. If 4 materials, carbon steel, 18Chr-8Ni, Monel, Aluminium are heated from 70 degrees F.
to 550 degrees F., which one will
expand more?
a. 18 Chr-8Ni
b. Monel
c. Aluminium
d. Carbon Steel
6. What is the modulus of elasticity of carbon steel material (carbon content 0.3) at 700
degrees F.
a. 25,500,000 psi
b. 25,300,000 psi
c. 26,700,000 psi
d. 29,500,000 psi
7. Poisson’s ratio may be taken as at all temperatures for all metals.
a. 0.30
b. 0.31
, c. 0.32
d. 0.33
8. Stop valves are allowed on the inlet and outlet side of a pressure-relieving device,
provided:
a. the valves are approved by the jurisdiction
b. they are approved by the inspector
c. they can be locked or sealed in both the open and closed position
d. the valves are non-rising stem valves
9. For a liquid thermal expansion relief device which protects only a blocked-in portion of a
piping system, the set pressure shall
not exceed the lesser of the system test pressure or % of design pressure.
a. 105
b. 110
c. 115
d. 120
10. An ASTM A53 Grade B pipe with a maximum wall thickness of 0.75” is being
considered for use in a cold service. What
minimum temperature can it be used and not have an impact test?
a. a.+20 degrees F
b. b.+15 degrees F
c. c.+10 degrees F
d. 0 degrees F
11. Each set of impact test specimens shall consist of specimen bars.
a. 2
b. 3
c. 4
d. 5
12. A carbon steel ASTM A 53 Grade B material is being impact tested. What is the
minimum energy requirement for this material (average for 3 specimens-fully deoxidized
steel)?
a. 7 ft-lbs
b. 10 ft-lbs
c. 13 ft-lbs
d. 15 ft-lbs
13. A thicker wall pipe is joined to a thinner wall pipe. The thicker pipe is taper bored to
facilitate the fit up. What is the maximum slope of the taper bore?
a. 15 degrees
b. 20 degrees
c. 25 degrees
d. 30 degrees
Verified Answers | Process Piping Code Certification Prep
1. What is the minimum wall schedule that can be used in a male threaded joint
in normal fluid service, carbon steel (notch-sensitive) and NPS 1.5 and smaller?
a. Sch 10
b. Sch 40
c. Sch 80
d. Sch 160
2. What is an example of a straight-threaded joint?
a. threads (male) of threaded piping
b. threads (female) on a threaded valve
c. an union comprising male and female ends joined with a threaded union nut
d. a joint used in instrument tubing
3. Determine the linear expansion (in/100ft) of a carbon steel pipe between 70
degrees F. and 450 degrees F.
a. 3.04” per 100 ft
b. 3.39” per 100 ft
c. 2.93” per 100 ft
d. 3.16” per 100 ft
4. A 20’ long carbon steel pipe is heated uniformly to 450 degrees F . from 70 degrees F.
Determine its length after heating.
a. 20.052’
b. 20.263’
c. 20.210’
d. 20.250’
5. If 4 materials, carbon steel, 18Chr-8Ni, Monel, Aluminium are heated from 70 degrees F.
to 550 degrees F., which one will
expand more?
a. 18 Chr-8Ni
b. Monel
c. Aluminium
d. Carbon Steel
6. What is the modulus of elasticity of carbon steel material (carbon content 0.3) at 700
degrees F.
a. 25,500,000 psi
b. 25,300,000 psi
c. 26,700,000 psi
d. 29,500,000 psi
7. Poisson’s ratio may be taken as at all temperatures for all metals.
a. 0.30
b. 0.31
, c. 0.32
d. 0.33
8. Stop valves are allowed on the inlet and outlet side of a pressure-relieving device,
provided:
a. the valves are approved by the jurisdiction
b. they are approved by the inspector
c. they can be locked or sealed in both the open and closed position
d. the valves are non-rising stem valves
9. For a liquid thermal expansion relief device which protects only a blocked-in portion of a
piping system, the set pressure shall
not exceed the lesser of the system test pressure or % of design pressure.
a. 105
b. 110
c. 115
d. 120
10. An ASTM A53 Grade B pipe with a maximum wall thickness of 0.75” is being
considered for use in a cold service. What
minimum temperature can it be used and not have an impact test?
a. a.+20 degrees F
b. b.+15 degrees F
c. c.+10 degrees F
d. 0 degrees F
11. Each set of impact test specimens shall consist of specimen bars.
a. 2
b. 3
c. 4
d. 5
12. A carbon steel ASTM A 53 Grade B material is being impact tested. What is the
minimum energy requirement for this material (average for 3 specimens-fully deoxidized
steel)?
a. 7 ft-lbs
b. 10 ft-lbs
c. 13 ft-lbs
d. 15 ft-lbs
13. A thicker wall pipe is joined to a thinner wall pipe. The thicker pipe is taper bored to
facilitate the fit up. What is the maximum slope of the taper bore?
a. 15 degrees
b. 20 degrees
c. 25 degrees
d. 30 degrees
