Practice Exam Questions And Correct

UA Steamfitter Welder Qualification Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• 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.

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• 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.

• 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.

• 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. 2 / 4

• 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.

• What does the number “70” in E7018 represent?

a) Tensile strength of 70,000 psi

b) Yield strength

c) Melting temperature 3 / 4

d) Hardness value

Rationale: The “70” indicates a minimum tensile strength of 70,000 psi.

• 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.

• 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.

• When performing a bend test, what is being evaluated?

a) Bead profile

b) Chemical composition

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