Alberta Welding Second Year AIT Final Exam
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1. What is the primary purpose of preheating before welding carbon
steel?
a) To increase welding speed
b) To prevent hydrogen-induced cracking
c) To improve appearance of weld
d) To reduce filler material usage
b) To prevent hydrogen-induced cracking
Preheating slows the cooling rate, reducing the risk of hydrogen
cracking in carbon steel.
2. Which welding process uses a non-consumable tungsten
electrode?
a) SMAW
b) GMAW
c) GTAW
d) FCAW
c) GTAW
GTAW (TIG) uses a tungsten electrode that does not melt during
welding.
3. What is the typical shielding gas used in GMAW for mild steel?
a) Argon
, b) Carbon dioxide
c) Helium
d) Oxygen
b) Carbon dioxide
CO₂ is commonly used because it provides good arc stability and
penetration for mild steel.
4. Which joint configuration is considered a groove weld?
a) Lap joint
b) Tee joint
c) Butt joint
d) Corner joint
c) Butt joint
A groove weld is made in a prepared groove between two
members, typical in butt joints.
5. What is the main disadvantage of using 100% CO₂ as a shielding
gas in GMAW?
a) Produces weak welds
b) High spatter
c) Slow deposition rate
d) Arc instability
b) High spatter
100% CO₂ produces deeper penetration but causes increased
spatter compared to argon mixes.
6. Which of the following defects is caused by rapid cooling of a
weld?
a) Porosity
b) Undercut
, c) Cracking
d) Overlap
c) Cracking
Rapid cooling can lead to residual stresses and cracks in the weld.
7. What does “duty cycle” refer to in welding machines?
a) Maximum amperage output
b) Percentage of time machine can weld at rated output without
overheating
c) Welding speed
d) Voltage range
b) Percentage of time machine can weld at rated output without
overheating
Duty cycle indicates how long a welder can operate continuously
before needing to cool down.
8. In SMAW, what does “DCEN” mean?
a) Direct current electrode negative
b) Direct current electrode neutral
c) Direct current electrode north
d) Direct current electrode nominal
a) Direct current electrode negative
DCEN means the electrode is negative and the workpiece is
positive, providing deeper penetration.
9. What is the function of flux in SMAW electrodes?
a) Conduct electricity
b) Shield the weld from atmospheric contamination
c) Increase current
d) Decrease penetration
, b) Shield the weld from atmospheric contamination
Flux melts during welding to create a protective gas and slag over
the molten weld.
10. Which welding defect is caused by improper electrode
manipulation?
a) Porosity
b) Incomplete fusion
c) Crater crack
d) All of the above
d) All of the above
Poor technique can lead to porosity, incomplete fusion, and crater
cracks.
11. When welding aluminum with GTAW, which type of current
is typically used?
a) AC
b) DCEN
c) DCEP
d) Pulsed DC
a) AC
AC allows cleaning action on aluminum, removing the oxide layer
during welding.
12. What is the typical bevel angle for a single V-groove weld in
10 mm plate?
a) 30°
b) 45°
c) 60°
d) 90°
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of preheating before welding carbon
steel?
a) To increase welding speed
b) To prevent hydrogen-induced cracking
c) To improve appearance of weld
d) To reduce filler material usage
b) To prevent hydrogen-induced cracking
Preheating slows the cooling rate, reducing the risk of hydrogen
cracking in carbon steel.
2. Which welding process uses a non-consumable tungsten
electrode?
a) SMAW
b) GMAW
c) GTAW
d) FCAW
c) GTAW
GTAW (TIG) uses a tungsten electrode that does not melt during
welding.
3. What is the typical shielding gas used in GMAW for mild steel?
a) Argon
, b) Carbon dioxide
c) Helium
d) Oxygen
b) Carbon dioxide
CO₂ is commonly used because it provides good arc stability and
penetration for mild steel.
4. Which joint configuration is considered a groove weld?
a) Lap joint
b) Tee joint
c) Butt joint
d) Corner joint
c) Butt joint
A groove weld is made in a prepared groove between two
members, typical in butt joints.
5. What is the main disadvantage of using 100% CO₂ as a shielding
gas in GMAW?
a) Produces weak welds
b) High spatter
c) Slow deposition rate
d) Arc instability
b) High spatter
100% CO₂ produces deeper penetration but causes increased
spatter compared to argon mixes.
6. Which of the following defects is caused by rapid cooling of a
weld?
a) Porosity
b) Undercut
, c) Cracking
d) Overlap
c) Cracking
Rapid cooling can lead to residual stresses and cracks in the weld.
7. What does “duty cycle” refer to in welding machines?
a) Maximum amperage output
b) Percentage of time machine can weld at rated output without
overheating
c) Welding speed
d) Voltage range
b) Percentage of time machine can weld at rated output without
overheating
Duty cycle indicates how long a welder can operate continuously
before needing to cool down.
8. In SMAW, what does “DCEN” mean?
a) Direct current electrode negative
b) Direct current electrode neutral
c) Direct current electrode north
d) Direct current electrode nominal
a) Direct current electrode negative
DCEN means the electrode is negative and the workpiece is
positive, providing deeper penetration.
9. What is the function of flux in SMAW electrodes?
a) Conduct electricity
b) Shield the weld from atmospheric contamination
c) Increase current
d) Decrease penetration
, b) Shield the weld from atmospheric contamination
Flux melts during welding to create a protective gas and slag over
the molten weld.
10. Which welding defect is caused by improper electrode
manipulation?
a) Porosity
b) Incomplete fusion
c) Crater crack
d) All of the above
d) All of the above
Poor technique can lead to porosity, incomplete fusion, and crater
cracks.
11. When welding aluminum with GTAW, which type of current
is typically used?
a) AC
b) DCEN
c) DCEP
d) Pulsed DC
a) AC
AC allows cleaning action on aluminum, removing the oxide layer
during welding.
12. What is the typical bevel angle for a single V-groove weld in
10 mm plate?
a) 30°
b) 45°
c) 60°
d) 90°
