12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The flux coating
B) The weld bead
C) The shielding gas makes sparks
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) A type of electrode
D) Flow of electricity through a gaseous space or air gap
  • 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) Extra filler metal
B) A groove melted into base metal left unfilled
C) A grove melted into the base metal that is a misaligned joint
D) A surface crack
  • 5. What is a crater?
A) A melted rod tip in the face of the weld
B) A depression in the face of the weld
C) A buildup of slag 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 weld toe
C) Imaginary line through HAZ boundary
D) Imaginary line through center of weld metal
  • 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) Undercut failure
B) Non-metallic material trapped in weld
C) Hot cracks trapped in the weld pool at the end
D) Steel trapped in slag
  • 9. What is a joint?
A) filler metal
B) a welding defect
C) The end of the metal piece that is welded first.
D) Location where two or more members are joined
  • 10. What is a crater crack?
A) A cold shut
B) A centerline crack
C) A crack in the crater of a weld bead
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) Machine lifespan over a 10 min period
B) Percentage of time welders operate at rated output
C) Arc stability rating
D) Electrode burn rate is working nonstop
  • 13. What is filler metal?
A) Distance fusion extends into base metal
B) Metal base plate
C) Flux coating
D) Metal added to make a welded joint
  • 14. What is depth of fusion?
A) Distance fusion extends into base metal
B) Distance bead width extends
C) Weld height
D) Rod penetration
  • 15. What is penetration?
A) Slag depth
B) Arc reach
C) Extent weld metal combines with base metal
D) Bead surface depth
  • 16. What is deposition rate?
A) Length welded per hour
B) Heat generated
C) Weight of metal deposited per unit time
D) Amount of slag produced
  • 17. What does SMAW stand for?
A) Shielded Metal Arc Welding
B) Stick Metal Arc Work
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 tungsten electrode
D) Uses shielding gas
  • 19. Advantage of SMAW?
A) Fully automated
B) High speed
C) Portable and inexpensive
D) No slag
  • 20. Disadvantage of SMAW?
A) Cannot weld steel
B) Only works indoors
C) It’s slow
D) Requires gas bottles
  • 21. 7018 can use:
A) Neither
B) AC or DC
C) DC only
D) AC only
  • 22. What polarity do we weld with?
A) Straight polarity
B) Alternating ground
C) No polarity
D) Reverse polarity
  • 23. Reverse polarity:
A) No polarity exists
B) Ground floats
C) Electrode negative
D) Electrode is positive, ground negative
  • 24. Two safety points:
A) Proper ventilation and protective clothing
B) Always weld outside use sitka gloves
C) Use small rods and low heat
D) Avoid using gloves never safety glasses
  • 25. SMAW electrode:
A) TIG tungsten
B) Consumable electrode covered with flux
C) MIG wire
D) Carbon rod
  • 26. Strength of 7018 rod:
A) 18k psi
B) 120k psi
C) 40k psi
D) 70k psi
  • 27. Meaning of 3rd digit in 7018:
A) Welding position
B) Positive polarity rod
C) Coating type
D) Rod length
  • 28. Meaning of 4th digit in 7018:
A) Composition of rod
B) Diameter
C) Arc length
D) Strength
  • 29. Four rod groups:
A) Inert, reactive, passive, active
B) Soft rods, hard rods, hot rods, cold rods
C) High carbon, low carbon, stainless, alloy
D) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
  • 30. DCEP:
A) Direct Coil Energy Pulse
B) Direct Current Electrode Positive
C) Dual Current Electrode Phase
D) Direct Current Elevated Pressure
  • 31. Why put rods in oven?
A) heat for penetration
B) Reduce moisture
C) sterilize
D) Prevent Bending
  • 32. Minimum oven temperature?
A) 175°F
B) 250°F
C) 500°F
D) 100°F
  • 33. E stands for:
A) Edge
B) Electrode
C) Energy
D) Earth
  • 34. Rod lengths:
A) 3–6 inches
B) 1–2 feet
C) 20–30 inches
D) 9–18 inches
  • 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) Stainless steel
D) A36 mild steel
  • 37. Light produced in welding:
A) Blue spectrum only
B) Green infrared
C) Electro violet and ultra red light
D) X‑ray emissions
  • 38. Five joint types:
A) Root, face, toe, leg, web
B) Lap, butt, edge, corner, T-joint
C) Curve, twist, bend, fold, lock
D) Arc, gas, flux, rod, plate
  • 39. AWS:
A) Advanced Weld Standards
B) American Wire Service
C) American Welding Society
D) Arc Welding System
  • 40. Heat affected zone:
A) Joint line
B) Metal altered but not melted
C) Slag-covered area
D) Metal melted completely
  • 41. PJP:
A) Partial Joint Penetration
B) Primary Joint Preparation
C) Pressure Joint Process
D) Parallel Joint Pass
  • 42. CJP:
A) Complete Joint Penetration
B) Controlled Joint Process
C) Central Joint Plane
D) Cut Joint Position
  • 43. 1F:
A) Overhead fillet
B) Vertical fillet
C) Flat groove
D) Flat fillet
  • 44. 2F
A) Horizontal groove
B) Horizontal fillet
C) Vertical groove
D) Flat Fillet
  • 45. 3F
A) Horizontal groove
B) Flat fillet
C) Vertical fillet
D) Overhead fillet
  • 46. 4F:
A) Overhead fillet
B) Vertical fillet
C) Horizontal fillet
D) Flat groove
  • 47. 1G:
A) Flat groove
B) Vertical groove
C) Overhead groove
D) Flat fillet
  • 48. 2G:
A) Horizontal fillet
B) Vertical groove
C) Flat groove
D) Horizontal groove
  • 49. 3G:
A) Overhead groove
B) Flat groove
C) Vertical groove
D) Horizontal fillet
  • 50. 4G:
A) Overhead groove
B) Horizontal fillet
C) Flat groove
D) Vertical groove
  • 51. Weave:
A) Cleaning motion
B) Root buildup
C) Slag brushing
D) Weld bead made with transverse movement
  • 52. No large amount of ______ should be in the weld
A) Hydrogen
B) Oxygen
C) Mercury
D) Sulphur
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