12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The metal to be welded
B) The weld bead
C) The shielding gas makes sparks
D) The flux coating
  • 2. What is an arc?
A) A joint type that lets light fly around everywhere
B) Flow of electricity through a gaseous space or air gap
C) Light from welding
D) A type of electrode
  • 3. What is arc length?
A) Length of the weld
B) The distance from the gap between plates and the clamp wire
C) The distance from the electrode to the weld pool
D) Length of the rod
  • 4. What is undercut?
A) A groove melted into base metal left unfilled
B) A surface crack
C) A grove melted into the base metal that is a misaligned joint
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 top of the bead
B) Imaginary line through weld toe
C) Imaginary line through center of weld metal
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) Metal particles expelled that do not form part of the weld
D) Arc blow 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) Steel trapped in slag
D) Non-metallic material trapped in weld
  • 9. What is a joint?
A) Location where two or more members are joined
B) filler metal
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 centerline crack
C) A crack in the crater of a weld bead
D) A cold shut
  • 11. What is ductility
A) Ability to resist rust
B) Ability to remain cold.
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) Machine lifespan over a 10 min period
C) Electrode burn rate is working nonstop
D) Arc stability rating
  • 13. What is filler metal?
A) Metal added to make a welded joint
B) Flux coating
C) Metal base plate
D) Distance fusion extends into base metal
  • 14. What is depth of fusion?
A) Weld height
B) Rod penetration
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) Weight of metal deposited per unit time
C) Length welded per hour
D) Amount of slag produced
  • 17. What does SMAW stand for?
A) Solid Metal Arc Welding
B) Shielded Mechanical Arc Welding
C) Stick Metal Arc Work
D) Shielded Metal Arc Welding
  • 18. What is SMAW?
A) Uses tungsten electrode
B) Uses heat of an arc between covered electrode and the work
C) Uses shielding gas
D) Purely mechanical process
  • 19. Advantage of SMAW?
A) Portable and inexpensive
B) High speed
C) Fully automated
D) No slag
  • 20. Disadvantage of SMAW?
A) It’s slow
B) Requires gas bottles
C) Only works indoors
D) Cannot weld steel
  • 21. 7018 can use:
A) AC only
B) Neither
C) DC only
D) AC or DC
  • 22. What polarity do we weld with?
A) Straight polarity
B) Reverse polarity
C) No polarity
D) Alternating ground
  • 23. Reverse polarity:
A) Electrode negative
B) Ground floats
C) No polarity exists
D) Electrode is positive, ground 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) Carbon rod
B) MIG wire
C) TIG tungsten
D) Consumable electrode covered with flux
  • 26. Strength of 7018 rod:
A) 40k psi
B) 18k psi
C) 70k psi
D) 120k psi
  • 27. Meaning of 3rd digit in 7018:
A) Positive polarity rod
B) Rod length
C) Welding position
D) Coating type
  • 28. Meaning of 4th digit in 7018:
A) Arc length
B) Strength
C) Diameter
D) Composition of rod
  • 29. Four rod groups:
A) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
B) Inert, reactive, passive, active
C) Soft rods, hard rods, hot rods, cold rods
D) High carbon, low carbon, stainless, alloy
  • 30. DCEP:
A) Direct Coil Energy Pulse
B) Direct Current Elevated Pressure
C) Dual Current Electrode Phase
D) Direct Current Electrode Positive
  • 31. Why put rods in oven?
A) sterilize
B) Reduce moisture
C) Prevent Bending
D) heat for penetration
  • 32. Minimum oven temperature?
A) 175°F
B) 500°F
C) 250°F
D) 100°F
  • 33. E stands for:
A) Edge
B) Electrode
C) Energy
D) Earth
  • 34. Rod lengths:
A) 9–18 inches
B) 3–6 inches
C) 20–30 inches
D) 1–2 feet
  • 35. MR or R:
A) Machine ready
B) Medium rated
C) Moisture resistant
D) Metal rod
  • 36. Base metal we use:
A) A36 mild steel
B) Cast iron
C) Aluminum
D) Stainless steel
  • 37. Light produced in welding:
A) Green infrared
B) Electro violet and ultra red light
C) Blue spectrum only
D) X‑ray emissions
  • 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 Wire Service
B) Arc Welding System
C) American Welding Society
D) Advanced Weld Standards
  • 40. Heat affected zone:
A) Metal altered but not melted
B) Metal melted completely
C) Slag-covered area
D) Joint line
  • 41. PJP:
A) Pressure Joint Process
B) Partial Joint Penetration
C) Primary Joint Preparation
D) Parallel Joint Pass
  • 42. CJP:
A) Cut Joint Position
B) Complete Joint Penetration
C) Central Joint Plane
D) Controlled Joint Process
  • 43. 1F:
A) Flat fillet
B) Flat groove
C) Overhead fillet
D) Vertical fillet
  • 44. 2F
A) Horizontal groove
B) Flat Fillet
C) Vertical groove
D) Horizontal fillet
  • 45. 3F
A) Overhead fillet
B) Horizontal groove
C) Vertical fillet
D) Flat fillet
  • 46. 4F:
A) Vertical fillet
B) Flat groove
C) Horizontal fillet
D) Overhead fillet
  • 47. 1G:
A) Flat fillet
B) Overhead groove
C) Flat groove
D) Vertical groove
  • 48. 2G:
A) Flat groove
B) Vertical groove
C) Horizontal fillet
D) Horizontal groove
  • 49. 3G:
A) Overhead groove
B) Horizontal fillet
C) Flat groove
D) Vertical groove
  • 50. 4G:
A) Flat groove
B) Horizontal fillet
C) Overhead groove
D) Vertical groove
  • 51. Weave:
A) Slag brushing
B) Root buildup
C) Cleaning motion
D) Weld bead made with transverse movement
  • 52. No large amount of ______ should be in the weld
A) Sulphur
B) Hydrogen
C) Oxygen
D) Mercury
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