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