CWB Level 2 Exam Actual 500 Questions
and Answers with Rationales (100%
Verified) 2026– Complete Study Guide
|Welding Inspection Certification Practice |
100% Guaranteed A
Exam Coverage Summary
The CWB Level 2 Welding Inspector certification exam assesses advanced knowledge across
welding processes (SMAW, GMAW, GTAW, FCAW, SAW), power sources and electrical
principles, welding metallurgy and heat treatment, non-destructive testing (NDT) methods,
weld discontinuities and defect identification, welding symbols and blueprint interpretation,
CSA standards (W47.1, W59, W178.2), inspection techniques and quality control, mechanical
testing procedures, and safety standards. The closed-book examination draws from modules
covering these technical areas.
1|P a g e SUCCESS!!!
,MULTIPLE CHOICES
Question 1: A plasma is best described as which of the following?
A) A liquid used to reduce adherence of spatter
B) The main component in an inverter power source
C) A gas made up of positive ions and free electrons
D) Always present in an electrical circuit
Answer: C
Plasma consists of ionized gas with positive ions and free electrons, which is essential for arc welding
processes.
Question 2: To increase the melting rate (burn-off rate) in the shielded metal arc welding (SMAW)
process, which polarity should be used?
A) DCEP
B) ACEP
C) DCEN
D) ACEP
Answer: C
DCEN (direct current electrode negative) directs more heat to the electrode, increasing the melting
rate compared to DCEP.
Question 3: Which type of welding power source provides a constant current (CC) output that is
independent of voltage variations?
A) Inverter
B) Transformer-rectifier
C) Constant voltage inverter
D) Pulsed-GMAW power source
Answer: B
Transformer-rectifier units deliver constant current output, ideal for SMAW and FCAW where current
stability is required.
2|P a g e SUCCESS!!!
,Question 4: In GMAW, what is the primary effect of increasing the shielding gas flow rate beyond the
recommended level?
A) Increased penetration
B) Reduced spatter
C) Dilution of the weld metal
D) Turbulence leading to porosity
Answer: D
Excessive gas flow creates turbulence in the weld pool, drawing atmospheric gases into the weld and
causing porosity.
Question 5: Which GMAW mode uses a high peak current followed by a low background current to
improve bead shape and reduce heat input?
A) Spray transfer
B) Globular transfer
C) Pulsed transfer
D) Short-circuit transfer
Answer: C
Pulsed GMAW alternates between high peak current for metal transfer and low background current
to control heat, producing stable arc and better bead geometry.
Question 6: To measure the strength of a welded joint, what mechanical test would you prescribe?
A) A transverse weld tension test
B) A Charpy test
C) A CTOD test
D) An all-weld metal tension test
Answer: A
The transverse weld tension test directly measures the tensile strength of the welded joint.
Question 7: Select the cutting process that would provide the narrowest heat-affected zone when
cutting 12.5 mm (0.5 in) thick carbon steel.
3|P a g e SUCCESS!!!
, A) Oxy-acetylene cutting
B) Air-carbon arc cutting
C) Oxy-propane cutting
D) Plasma arc cutting
Answer: E (Laser beam cutting)
Laser beam cutting produces the narrowest HAZ due to its highly focused energy and precise control.
Question 8: Which of the following refers to a welder test where a pipe assembly is placed vertically
and the joint welded in the horizontal position without rotating the assembly?
A) 1G
B) 2G
C) 3G
D) 5G
Answer: B
The 2G position involves a vertical pipe with the weld made in the horizontal orientation without
rotation.
Question 9: Which of the following imperfections is normally considered unacceptable regardless of
size or location?
A) Porosity
B) Crack
C) Inadequate penetration
D) Lamination
Answer: B
Cracks are considered the most severe discontinuity and are unacceptable regardless of size due to
their stress-concentrating nature.
Question 10: Select the correct penetrameter thickness for 2% sensitivity when radiographing a
weldment 1.25 inches in thickness.
A) 0.012 in
4|P a g e SUCCESS!!!
and Answers with Rationales (100%
Verified) 2026– Complete Study Guide
|Welding Inspection Certification Practice |
100% Guaranteed A
Exam Coverage Summary
The CWB Level 2 Welding Inspector certification exam assesses advanced knowledge across
welding processes (SMAW, GMAW, GTAW, FCAW, SAW), power sources and electrical
principles, welding metallurgy and heat treatment, non-destructive testing (NDT) methods,
weld discontinuities and defect identification, welding symbols and blueprint interpretation,
CSA standards (W47.1, W59, W178.2), inspection techniques and quality control, mechanical
testing procedures, and safety standards. The closed-book examination draws from modules
covering these technical areas.
1|P a g e SUCCESS!!!
,MULTIPLE CHOICES
Question 1: A plasma is best described as which of the following?
A) A liquid used to reduce adherence of spatter
B) The main component in an inverter power source
C) A gas made up of positive ions and free electrons
D) Always present in an electrical circuit
Answer: C
Plasma consists of ionized gas with positive ions and free electrons, which is essential for arc welding
processes.
Question 2: To increase the melting rate (burn-off rate) in the shielded metal arc welding (SMAW)
process, which polarity should be used?
A) DCEP
B) ACEP
C) DCEN
D) ACEP
Answer: C
DCEN (direct current electrode negative) directs more heat to the electrode, increasing the melting
rate compared to DCEP.
Question 3: Which type of welding power source provides a constant current (CC) output that is
independent of voltage variations?
A) Inverter
B) Transformer-rectifier
C) Constant voltage inverter
D) Pulsed-GMAW power source
Answer: B
Transformer-rectifier units deliver constant current output, ideal for SMAW and FCAW where current
stability is required.
2|P a g e SUCCESS!!!
,Question 4: In GMAW, what is the primary effect of increasing the shielding gas flow rate beyond the
recommended level?
A) Increased penetration
B) Reduced spatter
C) Dilution of the weld metal
D) Turbulence leading to porosity
Answer: D
Excessive gas flow creates turbulence in the weld pool, drawing atmospheric gases into the weld and
causing porosity.
Question 5: Which GMAW mode uses a high peak current followed by a low background current to
improve bead shape and reduce heat input?
A) Spray transfer
B) Globular transfer
C) Pulsed transfer
D) Short-circuit transfer
Answer: C
Pulsed GMAW alternates between high peak current for metal transfer and low background current
to control heat, producing stable arc and better bead geometry.
Question 6: To measure the strength of a welded joint, what mechanical test would you prescribe?
A) A transverse weld tension test
B) A Charpy test
C) A CTOD test
D) An all-weld metal tension test
Answer: A
The transverse weld tension test directly measures the tensile strength of the welded joint.
Question 7: Select the cutting process that would provide the narrowest heat-affected zone when
cutting 12.5 mm (0.5 in) thick carbon steel.
3|P a g e SUCCESS!!!
, A) Oxy-acetylene cutting
B) Air-carbon arc cutting
C) Oxy-propane cutting
D) Plasma arc cutting
Answer: E (Laser beam cutting)
Laser beam cutting produces the narrowest HAZ due to its highly focused energy and precise control.
Question 8: Which of the following refers to a welder test where a pipe assembly is placed vertically
and the joint welded in the horizontal position without rotating the assembly?
A) 1G
B) 2G
C) 3G
D) 5G
Answer: B
The 2G position involves a vertical pipe with the weld made in the horizontal orientation without
rotation.
Question 9: Which of the following imperfections is normally considered unacceptable regardless of
size or location?
A) Porosity
B) Crack
C) Inadequate penetration
D) Lamination
Answer: B
Cracks are considered the most severe discontinuity and are unacceptable regardless of size due to
their stress-concentrating nature.
Question 10: Select the correct penetrameter thickness for 2% sensitivity when radiographing a
weldment 1.25 inches in thickness.
A) 0.012 in
4|P a g e SUCCESS!!!
