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