CWB WELDING INSPECTOR PRACTICE
EXAM (LATEST 2026/2027) QUESTIONS
AND ANSWERS
1. According to CSA W47.1, what is the primary difference between a Division 1 and a Division
2 company?
A. Division 1 can perform NDT in-house, whereas Division 2 must outsource all inspection.
B. Division 1 requires a full-time Professional Engineer, while Division 2 requires a part-
time retained Professional Engineer.
C. Division 1 companies are certified for stainless steel only, while Division 2 covers carbon
steel.
D. Division 1 requires a minimum of 50 certified welders, while Division 2 requires at least
10.
Answer: B
Conceptual Explanation: CSA W47.1 classifies companies based on their engineering
personnel. Division 1 requires a full-time employed engineer, while Division 2 allows for a
retained (part-time) engineer.
,2. In the GMAW process, which shielding gas mixture is typically preferred for achieving
‘Spray Transfer’ on carbon steel?
A. 100% Carbon Dioxide (CO2)
B. 75% Argon / 25% CO2
C. 100% Helium
D. 90% Argon / 10% CO2
Answer: D
Conceptual Explanation: Spray transfer generally requires a shielding gas rich in Argon
(typically 85% or higher). 10% CO2 or lower allows the stable axial spray transition that
100% CO2 cannot achieve.
3. Which microstructural constituent is the most susceptible to Hydrogen Induced Cracking
(HIC) in the Heat Affected Zone (HAZ)?
A. Austenite
B. Ferrite
C. Martensite
D. Pearlite
Answer: C
, Conceptual Explanation: Martensite is a hard, brittle phase formed by rapid cooling. Its
high hardness and lattice strain make it highly sensitive to hydrogen embrittlement and
subsequent cracking.
4. A welding symbol has a flag located at the junction of the arrow and the reference line.
What does this signify?
A. The weld must be made in the shop.
B. The weld requires 100% ultrasonic testing.
C. The weld is a melt-through weld.
D. The weld must be made in the field.
Answer: D
Conceptual Explanation: A flag at the junction of the reference line and arrow indicates a
‘Field Weld,’ meaning the weld is not performed in the primary fabrication shop.
5. What is the primary purpose of the ‘Basic’ coating on an E4918 (E7018) electrode?
A. To increase the travel speed.
B. To provide high cellulose content for deep penetration.
C. To minimize the amount of hydrogen introduced into the weld metal.
D. To allow for welding with AC current only.
Answer: C
EXAM (LATEST 2026/2027) QUESTIONS
AND ANSWERS
1. According to CSA W47.1, what is the primary difference between a Division 1 and a Division
2 company?
A. Division 1 can perform NDT in-house, whereas Division 2 must outsource all inspection.
B. Division 1 requires a full-time Professional Engineer, while Division 2 requires a part-
time retained Professional Engineer.
C. Division 1 companies are certified for stainless steel only, while Division 2 covers carbon
steel.
D. Division 1 requires a minimum of 50 certified welders, while Division 2 requires at least
10.
Answer: B
Conceptual Explanation: CSA W47.1 classifies companies based on their engineering
personnel. Division 1 requires a full-time employed engineer, while Division 2 allows for a
retained (part-time) engineer.
,2. In the GMAW process, which shielding gas mixture is typically preferred for achieving
‘Spray Transfer’ on carbon steel?
A. 100% Carbon Dioxide (CO2)
B. 75% Argon / 25% CO2
C. 100% Helium
D. 90% Argon / 10% CO2
Answer: D
Conceptual Explanation: Spray transfer generally requires a shielding gas rich in Argon
(typically 85% or higher). 10% CO2 or lower allows the stable axial spray transition that
100% CO2 cannot achieve.
3. Which microstructural constituent is the most susceptible to Hydrogen Induced Cracking
(HIC) in the Heat Affected Zone (HAZ)?
A. Austenite
B. Ferrite
C. Martensite
D. Pearlite
Answer: C
, Conceptual Explanation: Martensite is a hard, brittle phase formed by rapid cooling. Its
high hardness and lattice strain make it highly sensitive to hydrogen embrittlement and
subsequent cracking.
4. A welding symbol has a flag located at the junction of the arrow and the reference line.
What does this signify?
A. The weld must be made in the shop.
B. The weld requires 100% ultrasonic testing.
C. The weld is a melt-through weld.
D. The weld must be made in the field.
Answer: D
Conceptual Explanation: A flag at the junction of the reference line and arrow indicates a
‘Field Weld,’ meaning the weld is not performed in the primary fabrication shop.
5. What is the primary purpose of the ‘Basic’ coating on an E4918 (E7018) electrode?
A. To increase the travel speed.
B. To provide high cellulose content for deep penetration.
C. To minimize the amount of hydrogen introduced into the weld metal.
D. To allow for welding with AC current only.
Answer: C
