CWB Level 1 Exam Prep (Latest 2025
/ 2026 Update) Questions and Verified
Answers | 100% Correct | Grade A
Questions 1–50: CWB Level 1 Exam
Weld Imperfections
1. Which weld imperfection is normally considered unacceptable regardless of size or
location?
A. Porosity
B. Crack
C. Inadequate penetration
D. Burn-through
Answer: Crack
Rationale: Cracks are critical defects that compromise weld integrity and are
unacceptable in all cases due to their potential to propagate.
2. What is a common cause of insufficient throat in a fillet weld?
A. Improper electrode angle
B. Loss of shielding gas
C. Incorrect consumable
D. Excessive travel speed
Answer: Improper electrode angle
Rationale: An improper electrode angle can reduce the throat thickness, weakening the
weld.
3. Which weld imperfection is most likely missed by radiography?
A. Porosity
B. Slag inclusions
C. Cracking
D. Burn-through
Answer: Cracking
Rationale: Radiography may miss fine cracks, especially if not aligned with the X-ray
beam, unlike porosity or slag inclusions.
, 4. What are common weld imperfections? (Select all that apply)
A. Porosity
B. Undercutting
C. Overlap
D. Perfect alignment
E. Lack of fusion
Answer: Porosity, Undercutting, Overlap, Lack of fusion
Rationale: These are common weld imperfections. Perfect alignment is not an
imperfection.
5. What is undercutting in a weld?
A. Excess weld metal
B. Groove at the weld toe
C. Incomplete fusion
D. Gas pockets
Answer: Groove at the weld toe
Rationale: Undercutting is a groove melted into the base metal at the weld toe, reducing
strength.
Welding Processes
6. Which welding process uses a non-consumable electrode?
A. GMAW
B. GTAW
C. SMAW
D. FCAW
Answer: GTAW
Rationale: Gas Tungsten Arc Welding (GTAW) uses a non-consumable tungsten
electrode.
7. What current/polarity is used for welding aluminum with GTAW?
A. DCEN
B. DCEP
C. AC
D. CC
Answer: AC
Rationale: Alternating Current (AC) is used for GTAW on aluminum to remove oxides
and ensure proper penetration.
8. True or False: All plasma arc cutting equipment is operated using DCEN.
A. True
B. False
/ 2026 Update) Questions and Verified
Answers | 100% Correct | Grade A
Questions 1–50: CWB Level 1 Exam
Weld Imperfections
1. Which weld imperfection is normally considered unacceptable regardless of size or
location?
A. Porosity
B. Crack
C. Inadequate penetration
D. Burn-through
Answer: Crack
Rationale: Cracks are critical defects that compromise weld integrity and are
unacceptable in all cases due to their potential to propagate.
2. What is a common cause of insufficient throat in a fillet weld?
A. Improper electrode angle
B. Loss of shielding gas
C. Incorrect consumable
D. Excessive travel speed
Answer: Improper electrode angle
Rationale: An improper electrode angle can reduce the throat thickness, weakening the
weld.
3. Which weld imperfection is most likely missed by radiography?
A. Porosity
B. Slag inclusions
C. Cracking
D. Burn-through
Answer: Cracking
Rationale: Radiography may miss fine cracks, especially if not aligned with the X-ray
beam, unlike porosity or slag inclusions.
, 4. What are common weld imperfections? (Select all that apply)
A. Porosity
B. Undercutting
C. Overlap
D. Perfect alignment
E. Lack of fusion
Answer: Porosity, Undercutting, Overlap, Lack of fusion
Rationale: These are common weld imperfections. Perfect alignment is not an
imperfection.
5. What is undercutting in a weld?
A. Excess weld metal
B. Groove at the weld toe
C. Incomplete fusion
D. Gas pockets
Answer: Groove at the weld toe
Rationale: Undercutting is a groove melted into the base metal at the weld toe, reducing
strength.
Welding Processes
6. Which welding process uses a non-consumable electrode?
A. GMAW
B. GTAW
C. SMAW
D. FCAW
Answer: GTAW
Rationale: Gas Tungsten Arc Welding (GTAW) uses a non-consumable tungsten
electrode.
7. What current/polarity is used for welding aluminum with GTAW?
A. DCEN
B. DCEP
C. AC
D. CC
Answer: AC
Rationale: Alternating Current (AC) is used for GTAW on aluminum to remove oxides
and ensure proper penetration.
8. True or False: All plasma arc cutting equipment is operated using DCEN.
A. True
B. False
