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How to weld
Contributed by: Sadler
  • 1. Which welding process uses a non-consumable tungsten electrode?
A) FCAW (Flux-Cored)
B) GMAW (MIG)
C) SMAW (Stick)
D) GTAW (TIG)
  • 2. What is the purpose of shielding gas in welding?
A) To cool the weld faster
B) To protect the weld from atmospheric contamination
C) To add filler metal to the weld
D) To increase the welding voltage
  • 3. Which safety equipment is essential for welding?
A) No gloves
B) Welding helmet
C) Sandals
D) Short-sleeved shirt
  • 4. What does 'SMAW' stand for?
A) Submerged Metal Arc Welding
B) Semi-Metal Arc Welding
C) Solid Metal Arc Welding
D) Shielded Metal Arc Welding
  • 5. What is 'undercut' in welding?
A) A groove melted into the base metal next to the weld
B) Lack of fusion between weld and base metal
C) A weld that is too small
D) Excessive weld metal on the surface
  • 6. What type of current is used in SMAW (Stick) welding?
A) Only AC
B) AC or DC
C) Only DCEN
D) Only DCEP
  • 7. What does 'GMAW' stand for?
A) Gas Metal Arc Welding
B) Guided Metal Arc Welding
C) Gas Mixture Arc Welding
D) Ground Metal Arc Welding
  • 8. What is 'slag'?
A) A byproduct of some welding processes that needs to be removed
B) The filler metal used in welding
C) The shielding gas used in welding
D) The electrical ground connection
  • 9. Which welding process typically uses a constant voltage power source?
A) SMAW (Stick)
B) GTAW (TIG)
C) GMAW (MIG)
D) All of the above
  • 10. What is 'porosity' in welding?
A) Incomplete fusion
B) Excessive penetration
C) Cracks in the weld metal
D) Gas pockets in the weld metal
  • 11. What does 'GTAW' stand for?
A) Gas Tungsten Arc Welding
B) Gas Torch Arc Welding
C) Ground Tungsten Arc Welding
D) Guided Tungsten Arc Welding
  • 12. Which gas is commonly used as a shielding gas in GTAW?
A) Carbon Dioxide
B) Nitrogen
C) Argon
D) Oxygen
  • 13. What is the function of a welding regulator?
A) To control the flow of shielding gas
B) To adjust the welding voltage
C) To cool the welding machine
D) To hold the welding electrode
  • 14. What is 'penetration' in welding?
A) The depth to which the weld metal fuses into the base metal
B) The width of the weld bead
C) The angle of the welding electrode
D) The height of the weld bead
  • 15. Which electrode is commonly used for SMAW (Stick) welding of mild steel?
A) E6010 or E7018
B) Aluminum
C) Copper
D) Pure Tungsten
  • 16. What is the purpose of preheating metal before welding?
A) To eliminate the need for shielding gas
B) To increase the welding speed
C) To make the metal easier to cut
D) To reduce the risk of cracking
  • 17. What is 'DCEP' polarity?
A) Alternating Current Electrode Negative
B) Direct Current Electrode Positive
C) Alternating Current Electrode Positive
D) Direct Current Electrode Negative
  • 18. What is 'lack of fusion'?
A) Excessive penetration
B) A weld that is too large
C) Failure of the weld metal to fuse properly with the base metal
D) A weld that is too small
  • 19. What does 'FCAW' stand for?
A) Flux Covered Arc Welding
B) Fused Core Arc Welding
C) Filament Core Arc Welding
D) Flux Cored Arc Welding
  • 20. Which type of welding joint is formed when two pieces of metal are placed edge to edge?
A) T-Joint
B) Lap Joint
C) Butt Joint
D) Corner Joint
  • 21. What is 'spatter' in welding?
A) The shielding gas used in welding
B) The grinding wheel used to clean welds
C) The filler metal used in welding
D) Small droplets of molten metal expelled during welding
  • 22. Why is proper ventilation important during welding?
A) To improve visibility
B) To prevent the weld from cooling too quickly
C) To remove harmful fumes and gases
D) To cool the welding machine
  • 23. What is the purpose of post-weld heat treatment?
A) To increase the welding speed
B) To add filler metal to the weld
C) To relieve stress in the weld
D) To clean the weld
  • 24. What is 'DCEP' commonly used for in SMAW?
A) Welding aluminum.
B) All welding applications.
C) Welding thin materials.
D) Welding with some types of electrodes for deeper penetration.
  • 25. Which material is best suited for GTAW (TIG) welding due to its precision?
A) Aluminum
B) Cast Iron
C) Mild Steel
D) Wood
  • 26. What is the purpose of weaving the welding electrode?
A) To speed up the welding process.
B) To reduce the heat input.
C) To widen the weld bead and improve fusion.
D) To make the weld look nicer.
  • 27. What is a common cause of weld cracking?
A) Using the wrong shielding gas.
B) High voltage.
C) Rapid cooling.
D) Slow travel speed.
  • 28. Which welding process is generally considered the fastest for welding thick steel?
A) Submerged Arc Welding (SAW)
B) SMAW (Stick)
C) GTAW (TIG)
D) Oxy-Acetylene Welding
  • 29. What type of fire extinguisher is best for welding?
A) A
B) B
C) ABC
D) D
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