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