NOCTI WELDING PRACTICE EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2025

NOCTI WELDING PRACTICE EXAM
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES
2025



1. What is the primary gas used in Gas Metal Arc Welding (GMAW)?

A) Oxygen
B) Nitrogen
C) Argon
D) Helium

Argon is commonly used as a shielding gas in GMAW to protect the weld
pool from atmospheric contamination.



2. What does SMAW stand for?

A) Shielded Metal Arc Welding
B) Submerged Metal Arc Welding
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,C) Shielded Metal Arc Welding
D) Semi-Metal Arc Welding

Shielded Metal Arc Welding uses a consumable electrode coated in flux.



3. What type of welding process uses a non-consumable tungsten
electrode?

A) GMAW
B) GTAW
C) SMAW
D) FCAW

GTAW (TIG welding) uses a non-consumable tungsten electrode.



4. Which welding process typically uses flux-cored wire?

A) SMAW
B) GTAW
C) FCAW
D) OAW

Flux-Cored Arc Welding (FCAW) uses a tubular wire filled with flux.



5. What is the primary purpose of the flux coating on SMAW electrodes?


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, A) To cool the weld
B) To shield the weld pool from contamination
C) To increase arc length
D) To speed up welding

Flux decomposes to form a shielding gas protecting the molten weld from
oxygen and nitrogen.



6. Which metal is commonly used as a base metal in welding practice?

A) Copper
B) Brass
C) Steel
D) Aluminum

Steel is the most common base metal in welding.



7. What is the ideal welding current for thin metals?

A) High AC current
B) Low current
C) High DC current
D) No current

Lower current helps prevent burn-through in thin metals.


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