Practice Test For Los Angeles City Welder
Certification Closed Book Section Latest Update
2025-2026 Questions and 100% Verified Correct
Answers with Rationale Guaranteed A+
1/33 Questions
• The minimum length of an intermittent fillet weld
o 1"
o 1 1/4"
o 1 1/2"
o 1 3/4"
Start
About This Quiz
Practice Test for Los Angeles City Welder Certification Closed Book Section
Timed - you have 30 minutes to complete Multiple Choice Questions.
Questions and Answers
• 2.
How many times may a low hydrogen electrode be rebaked?
, o Not limited
o Twice
o Once, only after a 2 hour holding period
o Once
Correct Answer
A. Once
Explanation
A low hydrogen electrode may be rebaked once. This is typically done to remove any
moisture or contaminants that may have been absorbed during storage. However, it is
important to note that rebaking should only be done once, as repeated rebaking can
negatively affect the performance and quality of the electrode.
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1
• 3.
Fillet weld end return lengths have a maximum requirement of ___________ times the
nominal size of the weld
o 1 1/2
o 4
o 2
o 3
Correct Answer
A. 4
Explanation
The correct answer is 4. Fillet weld end return lengths have a maximum requirement of
4 times the nominal size of the weld. This means that the length of the return on the end
of the fillet weld should be at least 4 times the size of the weld itself. This requirement
ensures that the weld is strong and secure, providing sufficient reinforcement and
preventing any potential failure or breakage.
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, • 4.
What is the major function of the coating on an arc welding electrode?
o Acts as a scavenger, removes oxides and impurities
o Influences incomplete penetration
o Liquefies the base metal
o Adds moisture and accelerates the cooling rate
Correct Answer
A. Acts as a scavenger, removes oxides and impurities
Explanation
The coating on an arc welding electrode acts as a scavenger by removing oxides and
impurities. This is an important function because oxides and impurities can weaken the
weld and affect its quality. By removing these substances, the coating helps to ensure a
cleaner and stronger weld.
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1
• 5.
Square wave refers to the ____________.
o shape of the filler metal
o shape of the tungsten electrode
o shape of the output power
o shape of the power source control box
Correct Answer
A. shape of the output power
Explanation
The square wave refers to the shape of the output power. In welding, the output power
is typically in the form of an electrical waveform. A square wave is a type of waveform
that has a constant amplitude and alternates between two levels, typically high and low,
Certification Closed Book Section Latest Update
2025-2026 Questions and 100% Verified Correct
Answers with Rationale Guaranteed A+
1/33 Questions
• The minimum length of an intermittent fillet weld
o 1"
o 1 1/4"
o 1 1/2"
o 1 3/4"
Start
About This Quiz
Practice Test for Los Angeles City Welder Certification Closed Book Section
Timed - you have 30 minutes to complete Multiple Choice Questions.
Questions and Answers
• 2.
How many times may a low hydrogen electrode be rebaked?
, o Not limited
o Twice
o Once, only after a 2 hour holding period
o Once
Correct Answer
A. Once
Explanation
A low hydrogen electrode may be rebaked once. This is typically done to remove any
moisture or contaminants that may have been absorbed during storage. However, it is
important to note that rebaking should only be done once, as repeated rebaking can
negatively affect the performance and quality of the electrode.
Rate this question:
1
• 3.
Fillet weld end return lengths have a maximum requirement of ___________ times the
nominal size of the weld
o 1 1/2
o 4
o 2
o 3
Correct Answer
A. 4
Explanation
The correct answer is 4. Fillet weld end return lengths have a maximum requirement of
4 times the nominal size of the weld. This means that the length of the return on the end
of the fillet weld should be at least 4 times the size of the weld itself. This requirement
ensures that the weld is strong and secure, providing sufficient reinforcement and
preventing any potential failure or breakage.
Rate this question:
, • 4.
What is the major function of the coating on an arc welding electrode?
o Acts as a scavenger, removes oxides and impurities
o Influences incomplete penetration
o Liquefies the base metal
o Adds moisture and accelerates the cooling rate
Correct Answer
A. Acts as a scavenger, removes oxides and impurities
Explanation
The coating on an arc welding electrode acts as a scavenger by removing oxides and
impurities. This is an important function because oxides and impurities can weaken the
weld and affect its quality. By removing these substances, the coating helps to ensure a
cleaner and stronger weld.
Rate this question:
1
• 5.
Square wave refers to the ____________.
o shape of the filler metal
o shape of the tungsten electrode
o shape of the output power
o shape of the power source control box
Correct Answer
A. shape of the output power
Explanation
The square wave refers to the shape of the output power. In welding, the output power
is typically in the form of an electrical waveform. A square wave is a type of waveform
that has a constant amplitude and alternates between two levels, typically high and low,
