UA Steamfitter Welder Qualification
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. Which welding process uses a continuously fed consumable wire
electrode and a shielding gas?
a) SMAW
b) GMAW
c) GTAW
d) SAW
Rationale: GMAW (Gas Metal Arc Welding) uses a wire feed and shielding
gas to protect the weld pool.
,2. What is the purpose of a root pass in pipe welding?
a) To add reinforcement
b) To fuse the joint from the inside out
c) To clean the metal surface
d) To prevent porosity
Rationale: The root pass establishes full penetration and fuses the base
metals at the joint's root.
3. In GTAW, what type of current is commonly used for welding aluminum?
a) DCEN
b) DCEP
c) AC
d) Pulsed DC
Rationale: Alternating current (AC) provides cleaning action needed to
remove oxide from aluminum.
4. Which AWS code governs the qualification of welders for piping systems?
a) AWS D1.1
b) ASME Section IX
c) API 1104
d) AWS D1.3
Rationale: ASME Section IX covers the qualification of welding procedures
and welders for pressure piping.
,5. What electrode classification is E6010?
a) Cellulosic, deep penetrating, fast freeze rod
b) Low hydrogen, iron powder
c) Rutile, smooth bead
d) Stainless steel electrode
Rationale: E6010 has a cellulosic coating providing deep penetration and
fast freezing characteristics.
6. The “E” in E7018 indicates:
a) Electrode
b) Efficiency
c) Elastic modulus
d) Energy
Rationale: The “E” prefix designates the filler as an electrode used in
welding.
7. What does the number “70” in E7018 represent?
a) Tensile strength of 70,000 psi
b) Yield strength
c) Melting temperature
, d) Hardness value
Rationale: The “70” indicates a minimum tensile strength of 70,000 psi.
8. What type of current is typically used with E7018 electrodes?
a) AC only
b) DCEP or AC
c) DCEN only
d) DCEN or AC
Rationale: E7018 operates best on DCEP but can also be used with AC
current.
9. What defect is caused by trapped gas in a solidified weld metal?
a) Undercut
b) Crater crack
c) Porosity
d) Incomplete fusion
Rationale: Porosity results when gas bubbles become trapped in the weld
metal as it solidifies.
10. When performing a bend test, what is being evaluated?
a) Bead profile
b) Chemical composition
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. Which welding process uses a continuously fed consumable wire
electrode and a shielding gas?
a) SMAW
b) GMAW
c) GTAW
d) SAW
Rationale: GMAW (Gas Metal Arc Welding) uses a wire feed and shielding
gas to protect the weld pool.
,2. What is the purpose of a root pass in pipe welding?
a) To add reinforcement
b) To fuse the joint from the inside out
c) To clean the metal surface
d) To prevent porosity
Rationale: The root pass establishes full penetration and fuses the base
metals at the joint's root.
3. In GTAW, what type of current is commonly used for welding aluminum?
a) DCEN
b) DCEP
c) AC
d) Pulsed DC
Rationale: Alternating current (AC) provides cleaning action needed to
remove oxide from aluminum.
4. Which AWS code governs the qualification of welders for piping systems?
a) AWS D1.1
b) ASME Section IX
c) API 1104
d) AWS D1.3
Rationale: ASME Section IX covers the qualification of welding procedures
and welders for pressure piping.
,5. What electrode classification is E6010?
a) Cellulosic, deep penetrating, fast freeze rod
b) Low hydrogen, iron powder
c) Rutile, smooth bead
d) Stainless steel electrode
Rationale: E6010 has a cellulosic coating providing deep penetration and
fast freezing characteristics.
6. The “E” in E7018 indicates:
a) Electrode
b) Efficiency
c) Elastic modulus
d) Energy
Rationale: The “E” prefix designates the filler as an electrode used in
welding.
7. What does the number “70” in E7018 represent?
a) Tensile strength of 70,000 psi
b) Yield strength
c) Melting temperature
, d) Hardness value
Rationale: The “70” indicates a minimum tensile strength of 70,000 psi.
8. What type of current is typically used with E7018 electrodes?
a) AC only
b) DCEP or AC
c) DCEN only
d) DCEN or AC
Rationale: E7018 operates best on DCEP but can also be used with AC
current.
9. What defect is caused by trapped gas in a solidified weld metal?
a) Undercut
b) Crater crack
c) Porosity
d) Incomplete fusion
Rationale: Porosity results when gas bubbles become trapped in the weld
metal as it solidifies.
10. When performing a bend test, what is being evaluated?
a) Bead profile
b) Chemical composition
