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Canadian Welding Bureau (CWB) Level 2 Welding Inspector
Certification ACTUAL EXAM QUESTIONS AND CORRECT
VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR – JUST
RELEASED
Core Knowledge Domains for Level 2
The Level 2 curriculum covers:
Welding Processes & Equipment – SMAW, GMAW, FCAW, GTAW, SAW
Power Sources for Welding – Constant current (CC) vs. constant voltage (CV)
Electrodes & Consumables – Classifications, fluxes, shielding gases
Welding Metallurgy – Steel metallurgy, stainless steels, heat-affected zone (HAZ)
Residual Stress & Distortion – Causes, effects, control methods
Mechanical Testing of Welds – Tensile, bend, impact, hardness testing
Non-Destructive Testing (NDT) – VT, MT, PT, UT, RT
Codes & Standards – CSA W59, W47.1, W178.2
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Practice Questions (1-200)
Domain 1: Welding Processes & Arc Physics (Questions 1-35)
1. An arc plasma consists of:
A) Atoms and gas molecules
B) Free electrons and positive ions
C) Carbon atoms and hydrogen molecules
D) Light of a fixed wavelength
Answer: B
Rationale: The arc plasma is an ionized gas consisting of free electrons and positive ions, which
allows electrical current to flow across the arc gap. The plasma state is created when sufficient
energy is added to a gas to strip electrons from atoms, creating a conductive mixture .
2. Which of the following welding processes is the most commonly used?
A) Resistance Welding
B) Brazing
C) Solid State Welding
D) Arc Welding
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Answer: D
Rationale: Arc welding processes (SMAW, GMAW, FCAW, GTAW, SAW) are the most widely used
in fabrication and construction due to their versatility, efficiency, and ability to join a wide range
of materials and thicknesses .
3. The most arc efficient welding process is the _______ process.
A) GTAW
B) SMAW
C) FCAW
D) SAW
Answer: D
Rationale: Submerged Arc Welding (SAW) has the highest arc efficiency because the arc is
completely buried under a granular flux blanket, which minimizes heat loss to the surrounding
atmosphere and concentrates heat into the workpiece .
4. Which two areas represent the largest voltage drop in a welding arc?
A) Electrode extension and Cathode drop zone
B) Electrode extension and Anode drop zone
C) Arc plasma and electrode extension
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D) Cathode drop zone and Anode drop zone
Answer: D
Rationale: The largest voltage drops occur in the cathode and anode drop zones (sheath regions)
near the electrode and workpiece surfaces. These regions account for the majority of the arc
voltage, with the plasma column contributing less to the total voltage drop .
5. The pinch force that aids in droplet detachment during spray transfer is produced by:
A) A self-induced magnetic field
B) Gravity
C) Surface tension
D) The plasma jet
Answer: A
Rationale: Pinch force (also called electromagnetic force or Lorentz force) is produced by the
self-induced magnetic field around the electrode. As current flows through the electrode, the
magnetic field constricts the molten droplet, helping to detach it from the wire tip .
6. Which of the following welding processes produces the least hydrogen weld metal content?
A) SMAW
B) GTAW
Canadian Welding Bureau (CWB) Level 2 Welding Inspector
Certification ACTUAL EXAM QUESTIONS AND CORRECT
VERIFIED SOLUTIONS LATEST UPDATE THIS YEAR – JUST
RELEASED
Core Knowledge Domains for Level 2
The Level 2 curriculum covers:
Welding Processes & Equipment – SMAW, GMAW, FCAW, GTAW, SAW
Power Sources for Welding – Constant current (CC) vs. constant voltage (CV)
Electrodes & Consumables – Classifications, fluxes, shielding gases
Welding Metallurgy – Steel metallurgy, stainless steels, heat-affected zone (HAZ)
Residual Stress & Distortion – Causes, effects, control methods
Mechanical Testing of Welds – Tensile, bend, impact, hardness testing
Non-Destructive Testing (NDT) – VT, MT, PT, UT, RT
Codes & Standards – CSA W59, W47.1, W178.2
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Practice Questions (1-200)
Domain 1: Welding Processes & Arc Physics (Questions 1-35)
1. An arc plasma consists of:
A) Atoms and gas molecules
B) Free electrons and positive ions
C) Carbon atoms and hydrogen molecules
D) Light of a fixed wavelength
Answer: B
Rationale: The arc plasma is an ionized gas consisting of free electrons and positive ions, which
allows electrical current to flow across the arc gap. The plasma state is created when sufficient
energy is added to a gas to strip electrons from atoms, creating a conductive mixture .
2. Which of the following welding processes is the most commonly used?
A) Resistance Welding
B) Brazing
C) Solid State Welding
D) Arc Welding
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Answer: D
Rationale: Arc welding processes (SMAW, GMAW, FCAW, GTAW, SAW) are the most widely used
in fabrication and construction due to their versatility, efficiency, and ability to join a wide range
of materials and thicknesses .
3. The most arc efficient welding process is the _______ process.
A) GTAW
B) SMAW
C) FCAW
D) SAW
Answer: D
Rationale: Submerged Arc Welding (SAW) has the highest arc efficiency because the arc is
completely buried under a granular flux blanket, which minimizes heat loss to the surrounding
atmosphere and concentrates heat into the workpiece .
4. Which two areas represent the largest voltage drop in a welding arc?
A) Electrode extension and Cathode drop zone
B) Electrode extension and Anode drop zone
C) Arc plasma and electrode extension
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D) Cathode drop zone and Anode drop zone
Answer: D
Rationale: The largest voltage drops occur in the cathode and anode drop zones (sheath regions)
near the electrode and workpiece surfaces. These regions account for the majority of the arc
voltage, with the plasma column contributing less to the total voltage drop .
5. The pinch force that aids in droplet detachment during spray transfer is produced by:
A) A self-induced magnetic field
B) Gravity
C) Surface tension
D) The plasma jet
Answer: A
Rationale: Pinch force (also called electromagnetic force or Lorentz force) is produced by the
self-induced magnetic field around the electrode. As current flows through the electrode, the
magnetic field constricts the molten droplet, helping to detach it from the wire tip .
6. Which of the following welding processes produces the least hydrogen weld metal content?
A) SMAW
B) GTAW
