CWB WELDING INSPECTOR LEVEL 3
EXAM PREP QUESTIONS AND
ANSWERS
1. Under CSA W178.2, which of the following is a specific responsibility unique to a Level 3
Welding Inspector that Level 1 and 2 inspectors generally do not perform?
A. Developing and interpreting quality control programs and supervising lower-level
inspectors
B. Verifying that welding procedures are approved and current
C. Performing visual inspection of completed welds
D. Checking the calibration of measuring equipment
Answer: A
Conceptual Explanation: Level 3 inspectors are expected to provide supervision, develop
QC programs, and handle complex interpretations beyond the scope of Level 1 and 2.
2. When calculating the Carbon Equivalent (CE) using the IIW formula, which element has the
same weighting as Manganese (Mn)?
A. Copper (Cu)
,B. Chromium (Cr)
C. Nickel (Ni)
D. Silicon (Si)
Answer: A
Conceptual Explanation: The IIW formula is CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15.
Therefore, Cu and Ni share the same divisor.
3. In Ultrasonic Testing (UT), which law is used to calculate the angle of refraction when a
sound beam passes from one medium to another?
A. Ohm’s Law
B. Snell’s Law
C. Hooke’s Law
D. Newton’s Third Law
Answer: B
Conceptual Explanation: Snell’s Law relates the angles of incidence and refraction to the
wave velocities of the two media.
4. Which microstructure is characterized by a needle-like appearance and is formed during
rapid cooling of austenite, increasing hardness but reducing ductility?
A. Pearlite
B. Ferrite
, C. Cementite
D. Martensite
Answer: D
Conceptual Explanation: Martensite is a hard, brittle, needle-like structure formed by the
rapid quenching of austenite.
5. According to CSA W59, what is the maximum depth of undercut permitted for a primary
member subject to cyclic tensile stress?
A. 0.5 mm (0.02 in)
B. 0.25 mm (0.01 in)
C. 1.0 mm (0.04 in)
D. No undercut permitted
Answer: B
Conceptual Explanation: CSA W59 specifies stricter undercut limits (0.25mm) for
members subject to cyclic tensile stress compared to static loading.
6. A ‘Type A’ Image Quality Indicator (IQI) in Radiographic Testing is also known as what?
A. Wire type
B. Hole type
C. Step wedge type
EXAM PREP QUESTIONS AND
ANSWERS
1. Under CSA W178.2, which of the following is a specific responsibility unique to a Level 3
Welding Inspector that Level 1 and 2 inspectors generally do not perform?
A. Developing and interpreting quality control programs and supervising lower-level
inspectors
B. Verifying that welding procedures are approved and current
C. Performing visual inspection of completed welds
D. Checking the calibration of measuring equipment
Answer: A
Conceptual Explanation: Level 3 inspectors are expected to provide supervision, develop
QC programs, and handle complex interpretations beyond the scope of Level 1 and 2.
2. When calculating the Carbon Equivalent (CE) using the IIW formula, which element has the
same weighting as Manganese (Mn)?
A. Copper (Cu)
,B. Chromium (Cr)
C. Nickel (Ni)
D. Silicon (Si)
Answer: A
Conceptual Explanation: The IIW formula is CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15.
Therefore, Cu and Ni share the same divisor.
3. In Ultrasonic Testing (UT), which law is used to calculate the angle of refraction when a
sound beam passes from one medium to another?
A. Ohm’s Law
B. Snell’s Law
C. Hooke’s Law
D. Newton’s Third Law
Answer: B
Conceptual Explanation: Snell’s Law relates the angles of incidence and refraction to the
wave velocities of the two media.
4. Which microstructure is characterized by a needle-like appearance and is formed during
rapid cooling of austenite, increasing hardness but reducing ductility?
A. Pearlite
B. Ferrite
, C. Cementite
D. Martensite
Answer: D
Conceptual Explanation: Martensite is a hard, brittle, needle-like structure formed by the
rapid quenching of austenite.
5. According to CSA W59, what is the maximum depth of undercut permitted for a primary
member subject to cyclic tensile stress?
A. 0.5 mm (0.02 in)
B. 0.25 mm (0.01 in)
C. 1.0 mm (0.04 in)
D. No undercut permitted
Answer: B
Conceptual Explanation: CSA W59 specifies stricter undercut limits (0.25mm) for
members subject to cyclic tensile stress compared to static loading.
6. A ‘Type A’ Image Quality Indicator (IQI) in Radiographic Testing is also known as what?
A. Wire type
B. Hole type
C. Step wedge type
