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