CWB WELDING INSPECTOR PRACTICE
EXAM (MODULES 1-10) QUESTIONS
AND ANSWERS
1. According to CSA W178.2, which of the following is a specific responsibility of a Level 2
Welding Inspector that a Level 1 cannot perform independently?
A. Supervision of Level 1 inspectors and final sign-off on inspection reports.
B. Verification of welder qualifications.
C. Visual inspection of finished welds.
D. Checking welding consumables for compliance.
Answer: A
Conceptual Explanation: A Level 2 inspector has the additional responsibility of
supervising Level 1 personnel and taking final responsibility for the certification of
weldments.
2. In the electrode classification E4918-1-H4, what does the ‘1’ immediately following the
hyphen represent?
A. The welding position.
,B. The chemical composition of the weld metal.
C. The type of coating.
D. Improved toughness and ductility at lower temperatures.
Answer: D
Conceptual Explanation: In CSA W48, the ‘-1’ suffix indicates that the electrode meets
specific requirements for improved toughness (impact energy) at lower temperatures.
3. Under CSA W59, for a statically loaded structure, what is the maximum permissible
undercut for material thickness less than 16mm (5/8 in)?
A. 0.25 mm
B. 2.0 mm
C. 1.0 mm
D. No undercut is allowed.
Answer: C
Conceptual Explanation: CSA W59 specifies that for statically loaded structures, undercut
shall not exceed 1.0 mm for material thicknesses under 16mm.
4. Which metallurgical zone is most susceptible to hydrogen-induced cold cracking (HICC)?
A. The Heat Affected Zone (HAZ).
B. The Fusion Zone.
, C. The Unaffected Base Metal.
D. The Reinforcement.
Answer: A
Conceptual Explanation: The HAZ, particularly the coarse-grained region, is most
susceptible to HICC due to high hardness, residual stresses, and the presence of hydrogen.
5. What is the primary purpose of the Carbon Equivalent (CE) formula in welding?
A. To calculate the exact melting point of the steel.
B. To select the appropriate shielding gas.
C. To measure the depth of penetration.
D. To determine the required preheat temperature to avoid cracking.
Answer: D
Conceptual Explanation: The CE is used to assess the hardenability of steel; higher CE
values indicate a higher risk of cracking, necessitating higher preheat temperatures.
6. In Ultrasonic Testing (UT), which type of wave is most commonly used for detecting
internal flaws in plate material?
A. Longitudinal (compression) waves.
B. Transverse (shear) waves.
C. Surface waves.
EXAM (MODULES 1-10) QUESTIONS
AND ANSWERS
1. According to CSA W178.2, which of the following is a specific responsibility of a Level 2
Welding Inspector that a Level 1 cannot perform independently?
A. Supervision of Level 1 inspectors and final sign-off on inspection reports.
B. Verification of welder qualifications.
C. Visual inspection of finished welds.
D. Checking welding consumables for compliance.
Answer: A
Conceptual Explanation: A Level 2 inspector has the additional responsibility of
supervising Level 1 personnel and taking final responsibility for the certification of
weldments.
2. In the electrode classification E4918-1-H4, what does the ‘1’ immediately following the
hyphen represent?
A. The welding position.
,B. The chemical composition of the weld metal.
C. The type of coating.
D. Improved toughness and ductility at lower temperatures.
Answer: D
Conceptual Explanation: In CSA W48, the ‘-1’ suffix indicates that the electrode meets
specific requirements for improved toughness (impact energy) at lower temperatures.
3. Under CSA W59, for a statically loaded structure, what is the maximum permissible
undercut for material thickness less than 16mm (5/8 in)?
A. 0.25 mm
B. 2.0 mm
C. 1.0 mm
D. No undercut is allowed.
Answer: C
Conceptual Explanation: CSA W59 specifies that for statically loaded structures, undercut
shall not exceed 1.0 mm for material thicknesses under 16mm.
4. Which metallurgical zone is most susceptible to hydrogen-induced cold cracking (HICC)?
A. The Heat Affected Zone (HAZ).
B. The Fusion Zone.
, C. The Unaffected Base Metal.
D. The Reinforcement.
Answer: A
Conceptual Explanation: The HAZ, particularly the coarse-grained region, is most
susceptible to HICC due to high hardness, residual stresses, and the presence of hydrogen.
5. What is the primary purpose of the Carbon Equivalent (CE) formula in welding?
A. To calculate the exact melting point of the steel.
B. To select the appropriate shielding gas.
C. To measure the depth of penetration.
D. To determine the required preheat temperature to avoid cracking.
Answer: D
Conceptual Explanation: The CE is used to assess the hardenability of steel; higher CE
values indicate a higher risk of cracking, necessitating higher preheat temperatures.
6. In Ultrasonic Testing (UT), which type of wave is most commonly used for detecting
internal flaws in plate material?
A. Longitudinal (compression) waves.
B. Transverse (shear) waves.
C. Surface waves.
