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