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