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12-11-25 Welding Midterm Review 2025
Contributed by: Sandifer
  • 1. What is the base metal?
A) The weld bead
B) The metal to be welded
C) The flux coating
D) The shielding gas makes sparks
  • 2. What is an arc?
A) A joint type that lets light fly around everywhere
B) A type of electrode
C) Flow of electricity through a gaseous space or air gap
D) Light from welding
  • 3. What is arc length?
A) Length of the weld
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 rod
  • 4. What is undercut?
A) A grove melted into the base metal that is a misaligned joint
B) A surface crack
C) A groove melted into base metal left unfilled
D) Extra filler metal
  • 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 porosity pocket in the face of the weld
D) A depression in the face of the weld
  • 6. What is the axis of weld?
A) Imaginary line through HAZ boundary
B) Imaginary line through weld toe
C) Imaginary line through top of the bead
D) Imaginary line through center of weld metal
  • 7. What is spatter?
A) Arc blow expelled that do not form part of the weld
B) Gas bubbles expelled that do not form part of the weld
C) Falling flux 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) Non-metallic material trapped in weld
C) Hot cracks trapped in the weld pool at the end
D) Undercut failure
  • 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 stress fracture formed cause metal was too clean
B) A cold shut
C) A centerline crack
D) A crack in the crater of a weld bead
  • 11. What is ductility
A) Ability to resist rust
B) Ability to stay magnetized
C) Ability to deform without failure
D) Ability to remain cold.
  • 12. What is duty cycle?
A) Percentage of time welders operate at rated output
B) Electrode burn rate is working nonstop
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) Distance fusion extends into base metal
D) Metal base plate
  • 14. What is depth of fusion?
A) Rod penetration
B) Weld height
C) Distance bead width extends
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) Heat generated
B) Length welded per hour
C) Weight of metal deposited per unit time
D) Amount of slag produced
  • 17. What does SMAW stand for?
A) Stick Metal Arc Work
B) Shielded Mechanical Arc Welding
C) Solid Metal Arc Welding
D) Shielded Metal Arc Welding
  • 18. What is SMAW?
A) Uses heat of an arc between covered electrode and the work
B) Uses shielding gas
C) Uses tungsten electrode
D) Purely mechanical process
  • 19. Advantage of SMAW?
A) High speed
B) Fully automated
C) Portable and inexpensive
D) No slag
  • 20. Disadvantage of SMAW?
A) Only works indoors
B) Requires gas bottles
C) It’s slow
D) Cannot weld steel
  • 21. 7018 can use:
A) Neither
B) AC or DC
C) AC only
D) DC only
  • 22. What polarity do we weld with?
A) Straight polarity
B) No polarity
C) Alternating ground
D) Reverse polarity
  • 23. Reverse polarity:
A) No polarity exists
B) Electrode negative
C) Electrode is positive, ground negative
D) Ground floats
  • 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) MIG wire
B) Carbon rod
C) Consumable electrode covered with flux
D) TIG tungsten
  • 26. Strength of 7018 rod:
A) 40k psi
B) 70k psi
C) 120k psi
D) 18k 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) Composition of rod
B) Arc length
C) Diameter
D) Strength
  • 29. Four rod groups:
A) High carbon, low carbon, stainless, alloy
B) Inert, reactive, passive, active
C) Soft rods, hard rods, hot rods, cold rods
D) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
  • 30. DCEP:
A) Dual Current Electrode Phase
B) Direct Coil Energy Pulse
C) Direct Current Electrode Positive
D) Direct Current Elevated Pressure
  • 31. Why put rods in oven?
A) Prevent Bending
B) sterilize
C) heat for penetration
D) Reduce moisture
  • 32. Minimum oven temperature?
A) 250°F
B) 500°F
C) 100°F
D) 175°F
  • 33. E stands for:
A) Energy
B) Earth
C) Electrode
D) Edge
  • 34. Rod lengths:
A) 3–6 inches
B) 1–2 feet
C) 9–18 inches
D) 20–30 inches
  • 35. MR or R:
A) Metal rod
B) Moisture resistant
C) Machine ready
D) Medium rated
  • 36. Base metal we use:
A) Aluminum
B) Cast iron
C) A36 mild steel
D) Stainless steel
  • 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) Lap, butt, edge, corner, T-joint
B) Arc, gas, flux, rod, plate
C) Curve, twist, bend, fold, lock
D) Root, face, toe, leg, web
  • 39. AWS:
A) American Welding Society
B) American Wire Service
C) Advanced Weld Standards
D) Arc Welding System
  • 40. Heat affected zone:
A) Metal altered but not melted
B) Joint line
C) Slag-covered area
D) Metal melted completely
  • 41. PJP:
A) Primary Joint Preparation
B) Pressure Joint Process
C) Partial Joint Penetration
D) Parallel Joint Pass
  • 42. CJP:
A) Controlled Joint Process
B) Cut Joint Position
C) Complete Joint Penetration
D) Central Joint Plane
  • 43. 1F:
A) Flat fillet
B) Overhead fillet
C) Flat groove
D) Vertical fillet
  • 44. 2F
A) Horizontal fillet
B) Flat Fillet
C) Vertical groove
D) Horizontal groove
  • 45. 3F
A) Horizontal groove
B) Vertical fillet
C) Overhead fillet
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 fillet
B) Flat groove
C) Horizontal groove
D) Vertical groove
  • 49. 3G:
A) Flat groove
B) Overhead groove
C) Vertical groove
D) Horizontal fillet
  • 50. 4G:
A) Vertical groove
B) Flat groove
C) Horizontal fillet
D) Overhead groove
  • 51. Weave:
A) Weld bead made with transverse movement
B) Cleaning motion
C) Slag brushing
D) Root buildup
  • 52. No large amount of ______ should be in the weld
A) Hydrogen
B) Mercury
C) Oxygen
D) Sulphur
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