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 weld bead
D) The metal to be welded
  • 2. What is an arc?
A) A type of electrode
B) Light from welding
C) A joint type that lets light fly around everywhere
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 weld
C) Length of the rod
D) The distance from the electrode to the weld pool
  • 4. What is undercut?
A) A groove melted into base metal left unfilled
B) A grove melted into the base metal that is a misaligned joint
C) Extra filler metal
D) A surface crack
  • 5. What is a crater?
A) A melted rod tip in the face of the weld
B) A porosity pocket in the face of the weld
C) A buildup of slag 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 center of weld metal
B) Imaginary line through HAZ boundary
C) Imaginary line through weld toe
D) Imaginary line through top of the bead
  • 7. What is spatter?
A) Arc blow expelled that do not form part of the weld
B) Falling flux expelled that do not form part of the weld
C) Gas bubbles 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) Undercut failure
D) Non-metallic material trapped in weld
  • 9. What is a joint?
A) a welding defect
B) The end of the metal piece that is welded first.
C) Location where two or more members are joined
D) filler metal
  • 10. What is a crater crack?
A) A stress fracture formed cause metal was too clean
B) A centerline crack
C) A cold shut
D) A crack in the crater of a weld bead
  • 11. What is ductility
A) Ability to deform without failure
B) Ability to resist rust
C) Ability to stay magnetized
D) Ability to remain cold.
  • 12. What is duty cycle?
A) Arc stability rating
B) Percentage of time welders operate at rated output
C) Machine lifespan over a 10 min period
D) Electrode burn rate is working nonstop
  • 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) Rod penetration
B) Weld height
C) Distance bead width extends
D) Distance fusion extends into base metal
  • 15. What is penetration?
A) Arc reach
B) Extent weld metal combines with base metal
C) Slag depth
D) Bead surface depth
  • 16. What is deposition rate?
A) Amount of slag produced
B) Weight of metal deposited per unit time
C) Length welded per hour
D) Heat generated
  • 17. What does SMAW stand for?
A) Shielded Mechanical Arc Welding
B) Shielded Metal Arc Welding
C) Solid Metal Arc Welding
D) Stick Metal Arc Work
  • 18. What is SMAW?
A) Uses tungsten electrode
B) Uses shielding gas
C) Purely mechanical process
D) Uses heat of an arc between covered electrode and the work
  • 19. Advantage of SMAW?
A) No slag
B) High speed
C) Fully automated
D) Portable and inexpensive
  • 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) DC only
C) AC or DC
D) AC only
  • 22. What polarity do we weld with?
A) Alternating ground
B) No polarity
C) Reverse polarity
D) Straight polarity
  • 23. Reverse polarity:
A) Ground floats
B) Electrode is positive, ground negative
C) Electrode negative
D) No polarity exists
  • 24. Two safety points:
A) Proper ventilation and protective clothing
B) Use small rods and low heat
C) Always weld outside use sitka gloves
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) 120k psi
B) 18k psi
C) 70k psi
D) 40k 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) Diameter
B) Arc length
C) Composition of rod
D) Strength
  • 29. Four rod groups:
A) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
B) Soft rods, hard rods, hot rods, cold rods
C) Inert, reactive, passive, active
D) High carbon, low carbon, stainless, alloy
  • 30. DCEP:
A) Direct Current Elevated Pressure
B) Direct Current Electrode Positive
C) Dual Current Electrode Phase
D) Direct Coil Energy Pulse
  • 31. Why put rods in oven?
A) heat for penetration
B) sterilize
C) Reduce moisture
D) Prevent Bending
  • 32. Minimum oven temperature?
A) 175°F
B) 500°F
C) 250°F
D) 100°F
  • 33. E stands for:
A) Earth
B) Energy
C) Electrode
D) Edge
  • 34. Rod lengths:
A) 3–6 inches
B) 9–18 inches
C) 1–2 feet
D) 20–30 inches
  • 35. MR or R:
A) Metal rod
B) Medium rated
C) Machine ready
D) Moisture resistant
  • 36. Base metal we use:
A) Stainless steel
B) Cast iron
C) A36 mild steel
D) Aluminum
  • 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) Arc, gas, flux, rod, plate
B) Curve, twist, bend, fold, lock
C) Root, face, toe, leg, web
D) Lap, butt, edge, corner, T-joint
  • 39. AWS:
A) Arc Welding System
B) American Wire Service
C) American Welding Society
D) Advanced Weld Standards
  • 40. Heat affected zone:
A) Joint line
B) Metal melted completely
C) Metal altered but not melted
D) Slag-covered area
  • 41. PJP:
A) Primary Joint Preparation
B) Partial Joint Penetration
C) Pressure Joint Process
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) Vertical fillet
B) Flat fillet
C) Flat groove
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) Horizontal groove
D) Vertical fillet
  • 46. 4F:
A) Horizontal fillet
B) Flat groove
C) Overhead fillet
D) Vertical fillet
  • 47. 1G:
A) Vertical groove
B) Overhead groove
C) Flat groove
D) Flat fillet
  • 48. 2G:
A) Horizontal fillet
B) Flat groove
C) Vertical groove
D) Horizontal groove
  • 49. 3G:
A) Vertical groove
B) Flat groove
C) Overhead groove
D) Horizontal fillet
  • 50. 4G:
A) Horizontal fillet
B) Overhead groove
C) Flat groove
D) Vertical groove
  • 51. Weave:
A) Weld bead made with transverse movement
B) Slag brushing
C) Root buildup
D) Cleaning motion
  • 52. No large amount of ______ should be in the weld
A) Hydrogen
B) Mercury
C) Sulphur
D) Oxygen
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