12-11-25 Welding Midterm Review 2025 - Quiz
  • 1. What is the base metal?
A) The flux coating
B) The weld bead
C) The metal to be welded
D) The shielding gas makes sparks
  • 2. What is an arc?
A) Light from welding
B) A joint type that lets light fly around everywhere
C) A type of electrode
D) Flow of electricity through a gaseous space or air gap
  • 3. What is arc length?
A) Length of the weld
B) Length of the rod
C) The distance from the gap between plates and the clamp wire
D) The distance from the electrode to the weld pool
  • 4. What is undercut?
A) A groove melted into base metal left unfilled
B) Extra filler metal
C) A grove melted into the base metal that is a misaligned joint
D) A surface crack
  • 5. What is a crater?
A) A porosity pocket in the face of the weld
B) A buildup of slag in the face of the weld
C) A depression in the face of the weld
D) A melted rod tip in the face of the weld
  • 6. What is the axis of weld?
A) Imaginary line through center of weld metal
B) Imaginary line through top of the bead
C) Imaginary line through weld toe
D) Imaginary line through HAZ boundary
  • 7. What is spatter?
A) Metal particles expelled that do not form part of the weld
B) Gas bubbles expelled that do not form part of the weld
C) Arc blow expelled that do not form part of the weld
D) Falling flux expelled that do not form part of the weld
  • 8. What is slag inclusion?
A) Steel trapped in slag
B) Hot cracks trapped in the weld pool at the end
C) Non-metallic material trapped in weld
D) Undercut failure
  • 9. What is a joint?
A) a welding defect
B) filler metal
C) The end of the metal piece that is welded first.
D) Location where two or more members are joined
  • 10. What is a crater crack?
A) A cold shut
B) A centerline crack
C) A crack in the crater of a weld bead
D) A stress fracture formed cause metal was too clean
  • 11. What is ductility
A) Ability to remain cold.
B) Ability to resist rust
C) Ability to deform without failure
D) Ability to stay magnetized
  • 12. What is duty cycle?
A) Electrode burn rate is working nonstop
B) Percentage of time welders operate at rated output
C) Arc stability rating
D) Machine lifespan over a 10 min period
  • 13. What is filler metal?
A) Metal added to make a welded joint
B) Flux coating
C) Metal base plate
D) Distance fusion extends into base metal
  • 14. What is depth of fusion?
A) Rod penetration
B) Distance fusion extends into base metal
C) Distance bead width extends
D) Weld height
  • 15. What is penetration?
A) Bead surface depth
B) Extent weld metal combines with base metal
C) Slag depth
D) Arc reach
  • 16. What is deposition rate?
A) Heat generated
B) Weight of metal deposited per unit time
C) Amount of slag produced
D) Length welded per hour
  • 17. What does SMAW stand for?
A) Solid Metal Arc Welding
B) Stick Metal Arc Work
C) Shielded Metal Arc Welding
D) Shielded Mechanical Arc Welding
  • 18. What is SMAW?
A) Uses shielding gas
B) Uses heat of an arc between covered electrode and the work
C) Uses tungsten electrode
D) Purely mechanical process
  • 19. Advantage of SMAW?
A) High speed
B) Portable and inexpensive
C) Fully automated
D) No slag
  • 20. Disadvantage of SMAW?
A) Only works indoors
B) Requires gas bottles
C) Cannot weld steel
D) It’s slow
  • 21. 7018 can use:
A) AC or DC
B) DC only
C) AC only
D) Neither
  • 22. What polarity do we weld with?
A) No polarity
B) Alternating ground
C) Straight polarity
D) Reverse polarity
  • 23. Reverse polarity:
A) Electrode negative
B) Electrode is positive, ground negative
C) No polarity exists
D) Ground floats
  • 24. Two safety points:
A) Always weld outside use sitka gloves
B) Use small rods and low heat
C) Proper ventilation and protective clothing
D) Avoid using gloves never safety glasses
  • 25. SMAW electrode:
A) TIG tungsten
B) Carbon rod
C) Consumable electrode covered with flux
D) MIG wire
  • 26. Strength of 7018 rod:
A) 18k psi
B) 120k psi
C) 70k psi
D) 40k psi
  • 27. Meaning of 3rd digit in 7018:
A) Coating type
B) Positive polarity rod
C) Welding position
D) Rod length
  • 28. Meaning of 4th digit in 7018:
A) Strength
B) Composition of rod
C) Arc length
D) Diameter
  • 29. Four rod groups:
A) Soft rods, hard rods, hot rods, cold rods
B) High carbon, low carbon, stainless, alloy
C) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
D) Inert, reactive, passive, active
  • 30. DCEP:
A) Direct Current Electrode Positive
B) Dual Current Electrode Phase
C) Direct Current Elevated Pressure
D) Direct Coil Energy Pulse
  • 31. Why put rods in oven?
A) sterilize
B) Reduce moisture
C) heat for penetration
D) Prevent Bending
  • 32. Minimum oven temperature?
A) 250°F
B) 175°F
C) 500°F
D) 100°F
  • 33. E stands for:
A) Earth
B) Edge
C) Electrode
D) Energy
  • 34. Rod lengths:
A) 20–30 inches
B) 1–2 feet
C) 3–6 inches
D) 9–18 inches
  • 35. MR or R:
A) Machine ready
B) Medium rated
C) Metal rod
D) Moisture resistant
  • 36. Base metal we use:
A) Stainless steel
B) Cast iron
C) A36 mild steel
D) Aluminum
  • 37. Light produced in welding:
A) X‑ray emissions
B) Blue spectrum only
C) Green infrared
D) Electro violet and ultra red light
  • 38. Five joint types:
A) Root, face, toe, leg, web
B) Lap, butt, edge, corner, T-joint
C) Curve, twist, bend, fold, lock
D) Arc, gas, flux, rod, plate
  • 39. AWS:
A) Arc Welding System
B) American Welding Society
C) Advanced Weld Standards
D) American Wire Service
  • 40. Heat affected zone:
A) Joint line
B) Metal altered but not melted
C) Slag-covered area
D) Metal melted completely
  • 41. PJP:
A) Partial Joint Penetration
B) Primary Joint Preparation
C) Pressure Joint Process
D) Parallel Joint Pass
  • 42. CJP:
A) Controlled Joint Process
B) Cut Joint Position
C) Central Joint Plane
D) Complete Joint Penetration
  • 43. 1F:
A) Flat fillet
B) Flat groove
C) Vertical fillet
D) Overhead fillet
  • 44. 2F
A) Flat Fillet
B) Horizontal groove
C) Horizontal fillet
D) Vertical groove
  • 45. 3F
A) Vertical fillet
B) Overhead fillet
C) Horizontal groove
D) Flat fillet
  • 46. 4F:
A) Flat groove
B) Overhead fillet
C) Horizontal fillet
D) Vertical fillet
  • 47. 1G:
A) Vertical groove
B) Flat groove
C) Flat fillet
D) Overhead groove
  • 48. 2G:
A) Horizontal groove
B) Horizontal fillet
C) Flat groove
D) Vertical groove
  • 49. 3G:
A) Vertical groove
B) Flat groove
C) Overhead groove
D) Horizontal fillet
  • 50. 4G:
A) Horizontal fillet
B) Flat groove
C) Overhead groove
D) Vertical groove
  • 51. Weave:
A) Weld bead made with transverse movement
B) Slag brushing
C) Cleaning motion
D) Root buildup
  • 52. No large amount of ______ should be in the weld
A) Sulphur
B) Hydrogen
C) Oxygen
D) Mercury
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