Texas Welding Certification Exam Verified Questions,
Correct Answers, and Detailed Explanations for
Science Students||Already Graded A+
1. What is the primary purpose of a welding helmet?
A. Protect from sparks only
B. Protect eyes and face from arc radiation
C. Improve visibility
D. Reduce heat exposure
Answer: B
The welding arc produces intense UV and IR radiation that can
damage eyes and skin.
2. Arc eye is caused by exposure to:
A. Heat
B. Noise
C. Ultraviolet radiation
D. Fumes
Answer: C
UV radiation from the arc burns the cornea, causing “flash burn.”
3. Which gas is most dangerous in confined welding spaces?
A. Oxygen
B. Argon
C. Nitrogen
D. Carbon dioxide
Answer: B
Argon is inert and displaces oxygen, creating an asphyxiation hazard.
,4. The best way to prevent electric shock is to:
A. Wear cotton clothing
B. Keep equipment dry and grounded
C. Increase voltage
D. Weld faster
Answer: B
Moisture and poor grounding increase shock risk.
5. Which fire extinguisher is used for electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
Answer: C
Class C extinguishers are designed for energized electrical equipment.
Welding Fundamentals
6. Welding is defined as:
A. Melting metal only
B. Joining metals by heat and/or pressure
C. Cutting metal
D. Grinding metal
Answer: B
Welding joins materials using heat, pressure, or both.
7. What polarity provides deeper penetration in SMAW?
A. AC
B. DCEN
C. DCEP
D. No polarity
, Answer: C
DCEP (reverse polarity) concentrates more heat at the electrode.
8. What does SMAW stand for?
A. Shielded Metal Arc Welding
B. Semi Metal Arc Welding
C. Shielded Mechanical Arc Welding
D. Standard Metal Arc Welding
Answer: A
Also known as stick welding.
9. The coating on SMAW electrodes provides:
A. Decoration
B. Electrical insulation only
C. Shielding gas and slag
D. Faster cooling
Answer: C
Flux protects the weld pool from contamination.
10. What happens if amperage is too high?
A. Poor fusion
B. Excess spatter and undercut
C. Electrode sticking
D. No arc
Answer: B
High current overheats the puddle and causes defects.
GMAW (MIG)
Correct Answers, and Detailed Explanations for
Science Students||Already Graded A+
1. What is the primary purpose of a welding helmet?
A. Protect from sparks only
B. Protect eyes and face from arc radiation
C. Improve visibility
D. Reduce heat exposure
Answer: B
The welding arc produces intense UV and IR radiation that can
damage eyes and skin.
2. Arc eye is caused by exposure to:
A. Heat
B. Noise
C. Ultraviolet radiation
D. Fumes
Answer: C
UV radiation from the arc burns the cornea, causing “flash burn.”
3. Which gas is most dangerous in confined welding spaces?
A. Oxygen
B. Argon
C. Nitrogen
D. Carbon dioxide
Answer: B
Argon is inert and displaces oxygen, creating an asphyxiation hazard.
,4. The best way to prevent electric shock is to:
A. Wear cotton clothing
B. Keep equipment dry and grounded
C. Increase voltage
D. Weld faster
Answer: B
Moisture and poor grounding increase shock risk.
5. Which fire extinguisher is used for electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
Answer: C
Class C extinguishers are designed for energized electrical equipment.
Welding Fundamentals
6. Welding is defined as:
A. Melting metal only
B. Joining metals by heat and/or pressure
C. Cutting metal
D. Grinding metal
Answer: B
Welding joins materials using heat, pressure, or both.
7. What polarity provides deeper penetration in SMAW?
A. AC
B. DCEN
C. DCEP
D. No polarity
, Answer: C
DCEP (reverse polarity) concentrates more heat at the electrode.
8. What does SMAW stand for?
A. Shielded Metal Arc Welding
B. Semi Metal Arc Welding
C. Shielded Mechanical Arc Welding
D. Standard Metal Arc Welding
Answer: A
Also known as stick welding.
9. The coating on SMAW electrodes provides:
A. Decoration
B. Electrical insulation only
C. Shielding gas and slag
D. Faster cooling
Answer: C
Flux protects the weld pool from contamination.
10. What happens if amperage is too high?
A. Poor fusion
B. Excess spatter and undercut
C. Electrode sticking
D. No arc
Answer: B
High current overheats the puddle and causes defects.
GMAW (MIG)
