Indiana Certified Welder Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which welding process uses a continuously fed wire electrode and
shielding gas to join metals?
A. SMAW
B. GTAW
C. GMAW
D. Oxy-fuel welding
C. GMAW
This process is Gas Metal Arc Welding, which uses a consumable wire
electrode fed through a welding gun along with shielding gas to
protect the weld pool from contamination.
2. What is the primary function of flux in Shielded Metal Arc Welding
(SMAW)?
A. Increase electrical resistance
B. Provide shielding gas and form slag
C. Reduce electrode melting
D. Increase arc voltage
B. SMAW
Flux in SMAW generates shielding gas and forms a protective slag
, layer that prevents atmospheric contamination during solidification
of the weld.
3. Which defect is characterized by a groove melted into the base metal
at the weld toe without being filled?
A. Porosity
B. Undercut
C. Slag inclusion
D. Overlap
B. Undercut
Undercut occurs when the base metal is melted away at the weld toe
and is not properly filled with weld metal, weakening the joint.
4. What is the standard position where a weld is performed on a
horizontal surface with the axis vertical?
A. Flat position
B. Horizontal position
C. Vertical position
D. Overhead position
A. Flat position
The flat position allows welding on the upper side of a horizontal
surface, making it the easiest and most stable welding position.
5. Which process uses a non-consumable tungsten electrode?
A. FCAW
B. GMAW
C. GTAW
D. SMAW
C. GTAW
Gas Tungsten Arc Welding uses a non-consumable tungsten electrode
and an external filler metal when needed, producing high-quality
welds.
, 6. What type of joint is formed when two pieces are placed edge to edge
in the same plane?
A. Lap joint
B. Butt joint
C. T-joint
D. Corner joint
B. Butt joint
A butt joint occurs when two workpieces are aligned in the same
plane and joined at their edges.
7. Which welding defect results from trapped gas in the solidifying weld
metal?
A. Cracking
B. Porosity
C. Lack of fusion
D. Slag inclusion
B. Porosity
Porosity is caused by gas entrapment during solidification, forming
cavities or holes in the weld bead.
8. Which safety equipment is most critical for protecting the welder’s
eyes from arc radiation?
A. Ear plugs
B. Welding helmet
C. Steel-toe boots
D. Respirator
B. Welding helmet
A welding helmet with appropriate shade protects the eyes and face
from ultraviolet and infrared radiation produced by the arc.
9. What does FCAW stand for?
A. Flux Core Arc Welding
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which welding process uses a continuously fed wire electrode and
shielding gas to join metals?
A. SMAW
B. GTAW
C. GMAW
D. Oxy-fuel welding
C. GMAW
This process is Gas Metal Arc Welding, which uses a consumable wire
electrode fed through a welding gun along with shielding gas to
protect the weld pool from contamination.
2. What is the primary function of flux in Shielded Metal Arc Welding
(SMAW)?
A. Increase electrical resistance
B. Provide shielding gas and form slag
C. Reduce electrode melting
D. Increase arc voltage
B. SMAW
Flux in SMAW generates shielding gas and forms a protective slag
, layer that prevents atmospheric contamination during solidification
of the weld.
3. Which defect is characterized by a groove melted into the base metal
at the weld toe without being filled?
A. Porosity
B. Undercut
C. Slag inclusion
D. Overlap
B. Undercut
Undercut occurs when the base metal is melted away at the weld toe
and is not properly filled with weld metal, weakening the joint.
4. What is the standard position where a weld is performed on a
horizontal surface with the axis vertical?
A. Flat position
B. Horizontal position
C. Vertical position
D. Overhead position
A. Flat position
The flat position allows welding on the upper side of a horizontal
surface, making it the easiest and most stable welding position.
5. Which process uses a non-consumable tungsten electrode?
A. FCAW
B. GMAW
C. GTAW
D. SMAW
C. GTAW
Gas Tungsten Arc Welding uses a non-consumable tungsten electrode
and an external filler metal when needed, producing high-quality
welds.
, 6. What type of joint is formed when two pieces are placed edge to edge
in the same plane?
A. Lap joint
B. Butt joint
C. T-joint
D. Corner joint
B. Butt joint
A butt joint occurs when two workpieces are aligned in the same
plane and joined at their edges.
7. Which welding defect results from trapped gas in the solidifying weld
metal?
A. Cracking
B. Porosity
C. Lack of fusion
D. Slag inclusion
B. Porosity
Porosity is caused by gas entrapment during solidification, forming
cavities or holes in the weld bead.
8. Which safety equipment is most critical for protecting the welder’s
eyes from arc radiation?
A. Ear plugs
B. Welding helmet
C. Steel-toe boots
D. Respirator
B. Welding helmet
A welding helmet with appropriate shade protects the eyes and face
from ultraviolet and infrared radiation produced by the arc.
9. What does FCAW stand for?
A. Flux Core Arc Welding
