CWB Welding Inspector Level 3 Exam Prep Actual
2025/2026 with Detailed Rationales | 100% Verified |
Pass Guaranteed – A+ Graded
Q1: In the context of CSA W59, a welder must be re-qualified if they have not welded
for how many months?
A. 3 months
B. 6 months
C. 12 months
D. 24 months
Correct Answer: B
Rationale: Correct because CSA W59 requires requalification after 6 months of
inactivity.
Q2: Which of the following is a discontinuity that is NOT acceptable in a weld?
A. Porosity
B. Undercut
C. Lack of fusion
D. Spatter
Correct Answer: C
Rationale: Correct because lack of fusion is a critical defect that must be rejected.
Q3: A welding procedure qualification record (PQR) is used to:
A. Qualify a welder
B. Document welding variables and test results
C. Inspect a finished weld
D. Determine welding safety requirements
Correct Answer: B
Rationale: Correct because PQR documents the welding variables and results of
procedure qualification testing.
Q4: The tensile test is used to measure:
A. Hardness of the weld metal
B. Ultimate tensile strength and ductility
C. Toughness of the weld metal
D. Corrosion resistance
Correct Answer: B
,Rationale: Correct because tensile testing measures strength and ductility
(elongation).
Q5: What is the most common shielding gas used in GMAW (MIG) welding of carbon
steel?
A. 100% Argon
B. 75% Argon / 25% CO2
C. 100% CO2
D. Helium
Correct Answer: B
Rationale: Correct because 75% Argon / 25% CO2 is the most common shielding gas
for steel GMAW.
Q6: A visual inspection of a weld reveals a depression at the toe of the weld that is
less than the base metal thickness. This defect is called:
A. Undercut
B. Overlap
C. Porosity
D. Incomplete penetration
Correct Answer: A
Rationale: Correct because undercut is a groove melted into the base metal at the
weld toe.
Q7: Which of the following is a non-destructive testing (NDT) method?
A. Charpy V-notch impact test
B. Tensile test
C. Liquid penetrant testing
D. Hardness test
Correct Answer: C
Rationale: Correct because liquid penetrant testing is an NDT method that does not
destroy the part.
Q8: The heat-affected zone (HAZ) in a weld is:
A. The melted weld metal
B. The base metal that has been heated but not melted
C. The area of the weld cap
D. The root pass of the weld
Correct Answer: B
, Rationale: Correct because HAZ is the base metal adjacent to the weld that has
undergone thermal cycling.
Q9: In SMAW welding, the electrode type E7018 indicates:
A. A low-hydrogen electrode with 70,000 psi tensile strength
B. A high-carbon electrode
C. A stainless steel electrode
D. A hardfacing electrode
Correct Answer: A
Rationale: Correct because E7018 is a low-hydrogen electrode with 70,000 psi
minimum tensile strength.
Q10: The essential variable change that requires re-qualification of a welding
procedure is:
A. Change in electrode diameter
B. Change in travel speed
C. Change in base metal thickness exceeding the qualified range
D. Change in welding position
Correct Answer: C
Rationale: Correct because exceeding the qualified thickness range requires
requalification.
Q11: Which of the following is a characteristic of a hydrogen-induced cold crack?
A. Occurs immediately after welding
B. Occurs after the weld has cooled to room temperature
C. Occurs during solidification
D. Is always visible on the weld surface
Correct Answer: B
Rationale: Correct because hydrogen-induced cold cracks occur after cooling (hours
to days after welding).
Q12: The CSA W59 standard is applicable to:
A. Pressure vessels
B. Structural steel welding
C. Pipeline welding
D. Aerospace welding
Correct Answer: B
Rationale: Correct because CSA W59 covers structural steel welding in Canada.
2025/2026 with Detailed Rationales | 100% Verified |
Pass Guaranteed – A+ Graded
Q1: In the context of CSA W59, a welder must be re-qualified if they have not welded
for how many months?
A. 3 months
B. 6 months
C. 12 months
D. 24 months
Correct Answer: B
Rationale: Correct because CSA W59 requires requalification after 6 months of
inactivity.
Q2: Which of the following is a discontinuity that is NOT acceptable in a weld?
A. Porosity
B. Undercut
C. Lack of fusion
D. Spatter
Correct Answer: C
Rationale: Correct because lack of fusion is a critical defect that must be rejected.
Q3: A welding procedure qualification record (PQR) is used to:
A. Qualify a welder
B. Document welding variables and test results
C. Inspect a finished weld
D. Determine welding safety requirements
Correct Answer: B
Rationale: Correct because PQR documents the welding variables and results of
procedure qualification testing.
Q4: The tensile test is used to measure:
A. Hardness of the weld metal
B. Ultimate tensile strength and ductility
C. Toughness of the weld metal
D. Corrosion resistance
Correct Answer: B
,Rationale: Correct because tensile testing measures strength and ductility
(elongation).
Q5: What is the most common shielding gas used in GMAW (MIG) welding of carbon
steel?
A. 100% Argon
B. 75% Argon / 25% CO2
C. 100% CO2
D. Helium
Correct Answer: B
Rationale: Correct because 75% Argon / 25% CO2 is the most common shielding gas
for steel GMAW.
Q6: A visual inspection of a weld reveals a depression at the toe of the weld that is
less than the base metal thickness. This defect is called:
A. Undercut
B. Overlap
C. Porosity
D. Incomplete penetration
Correct Answer: A
Rationale: Correct because undercut is a groove melted into the base metal at the
weld toe.
Q7: Which of the following is a non-destructive testing (NDT) method?
A. Charpy V-notch impact test
B. Tensile test
C. Liquid penetrant testing
D. Hardness test
Correct Answer: C
Rationale: Correct because liquid penetrant testing is an NDT method that does not
destroy the part.
Q8: The heat-affected zone (HAZ) in a weld is:
A. The melted weld metal
B. The base metal that has been heated but not melted
C. The area of the weld cap
D. The root pass of the weld
Correct Answer: B
, Rationale: Correct because HAZ is the base metal adjacent to the weld that has
undergone thermal cycling.
Q9: In SMAW welding, the electrode type E7018 indicates:
A. A low-hydrogen electrode with 70,000 psi tensile strength
B. A high-carbon electrode
C. A stainless steel electrode
D. A hardfacing electrode
Correct Answer: A
Rationale: Correct because E7018 is a low-hydrogen electrode with 70,000 psi
minimum tensile strength.
Q10: The essential variable change that requires re-qualification of a welding
procedure is:
A. Change in electrode diameter
B. Change in travel speed
C. Change in base metal thickness exceeding the qualified range
D. Change in welding position
Correct Answer: C
Rationale: Correct because exceeding the qualified thickness range requires
requalification.
Q11: Which of the following is a characteristic of a hydrogen-induced cold crack?
A. Occurs immediately after welding
B. Occurs after the weld has cooled to room temperature
C. Occurs during solidification
D. Is always visible on the weld surface
Correct Answer: B
Rationale: Correct because hydrogen-induced cold cracks occur after cooling (hours
to days after welding).
Q12: The CSA W59 standard is applicable to:
A. Pressure vessels
B. Structural steel welding
C. Pipeline welding
D. Aerospace welding
Correct Answer: B
Rationale: Correct because CSA W59 covers structural steel welding in Canada.
