12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The shielding gas makes sparks
B) The flux coating
C) The metal to be welded
D) The weld bead
  • 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) 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) A surface crack
B) A grove melted into the base metal that is a misaligned joint
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 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 weld toe
B) Imaginary line through center of weld metal
C) Imaginary line through HAZ boundary
D) Imaginary line through top of the bead
  • 7. What is spatter?
A) Falling flux expelled that do not form part of the weld
B) Metal particles expelled that do not form part of the weld
C) Gas bubbles 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) Steel trapped in slag
C) Undercut failure
D) Non-metallic material trapped in weld
  • 9. What is a joint?
A) The end of the metal piece that is welded first.
B) filler metal
C) Location where two or more members are joined
D) a welding defect
  • 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 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) Machine lifespan over a 10 min period
C) Electrode burn rate is working nonstop
D) Percentage of time welders operate at rated output
  • 13. What is filler metal?
A) Distance fusion extends into base metal
B) Metal added to make a welded joint
C) Metal base plate
D) Flux coating
  • 14. What is depth of fusion?
A) Distance fusion extends into base metal
B) Weld height
C) Rod penetration
D) Distance bead width extends
  • 15. What is penetration?
A) Bead surface depth
B) Extent weld metal combines with base metal
C) Arc reach
D) Slag depth
  • 16. What is deposition rate?
A) Weight of metal deposited per unit time
B) Heat generated
C) Length welded per hour
D) Amount of slag produced
  • 17. What does SMAW stand for?
A) Shielded Metal Arc Welding
B) Stick Metal Arc Work
C) Shielded Mechanical Arc Welding
D) Solid Metal 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) Portable and inexpensive
C) High speed
D) Fully automated
  • 20. Disadvantage of SMAW?
A) Requires gas bottles
B) Only works indoors
C) Cannot weld steel
D) It’s slow
  • 21. 7018 can use:
A) DC only
B) AC only
C) Neither
D) AC or DC
  • 22. What polarity do we weld with?
A) Straight polarity
B) Alternating ground
C) Reverse polarity
D) No polarity
  • 23. Reverse polarity:
A) Electrode negative
B) Ground floats
C) Electrode is positive, ground negative
D) No polarity exists
  • 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) TIG tungsten
B) MIG wire
C) Carbon rod
D) Consumable electrode covered with flux
  • 26. Strength of 7018 rod:
A) 40k psi
B) 18k psi
C) 120k psi
D) 70k psi
  • 27. Meaning of 3rd digit in 7018:
A) Rod length
B) Coating type
C) Positive polarity rod
D) Welding position
  • 28. Meaning of 4th digit in 7018:
A) Arc length
B) Composition of rod
C) Diameter
D) Strength
  • 29. Four rod groups:
A) Inert, reactive, passive, active
B) High carbon, low carbon, stainless, alloy
C) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
D) Soft rods, hard rods, hot rods, cold rods
  • 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) heat for penetration
B) sterilize
C) Reduce moisture
D) Prevent Bending
  • 32. Minimum oven temperature?
A) 250°F
B) 175°F
C) 500°F
D) 100°F
  • 33. E stands for:
A) Edge
B) Earth
C) Energy
D) Electrode
  • 34. Rod lengths:
A) 3–6 inches
B) 9–18 inches
C) 1–2 feet
D) 20–30 inches
  • 35. MR or R:
A) Medium rated
B) Metal rod
C) Machine ready
D) Moisture resistant
  • 36. Base metal we use:
A) Aluminum
B) A36 mild steel
C) Cast iron
D) Stainless steel
  • 37. Light produced in welding:
A) X‑ray emissions
B) Green infrared
C) Blue spectrum only
D) Electro violet and ultra red light
  • 38. Five joint types:
A) Curve, twist, bend, fold, lock
B) Root, face, toe, leg, web
C) Arc, gas, flux, rod, plate
D) Lap, butt, edge, corner, T-joint
  • 39. AWS:
A) Advanced Weld Standards
B) Arc Welding System
C) American Welding Society
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) Parallel Joint Pass
B) Partial Joint Penetration
C) Primary Joint Preparation
D) Pressure Joint Process
  • 42. CJP:
A) Complete Joint Penetration
B) Controlled Joint Process
C) Central Joint Plane
D) Cut Joint Position
  • 43. 1F:
A) Flat fillet
B) Flat groove
C) Vertical fillet
D) Overhead fillet
  • 44. 2F
A) Flat Fillet
B) Horizontal groove
C) Vertical groove
D) Horizontal fillet
  • 45. 3F
A) Flat fillet
B) Overhead fillet
C) Vertical fillet
D) Horizontal groove
  • 46. 4F:
A) Vertical fillet
B) Horizontal fillet
C) Flat groove
D) Overhead fillet
  • 47. 1G:
A) Overhead groove
B) Flat fillet
C) Flat groove
D) Vertical groove
  • 48. 2G:
A) Horizontal fillet
B) Vertical groove
C) Flat groove
D) Horizontal groove
  • 49. 3G:
A) Flat groove
B) Vertical groove
C) Horizontal fillet
D) Overhead groove
  • 50. 4G:
A) Flat groove
B) Horizontal fillet
C) Overhead groove
D) Vertical groove
  • 51. Weave:
A) Slag brushing
B) Cleaning motion
C) Weld bead made with transverse movement
D) Root buildup
  • 52. No large amount of ______ should be in the weld
A) Sulphur
B) Hydrogen
C) Oxygen
D) Mercury
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