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) Flow of electricity through a gaseous space or air gap
B) Light from welding
C) A joint type that lets light fly around everywhere
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) Length of the rod
D) The distance from the electrode to the weld pool
  • 4. What is undercut?
A) Extra filler metal
B) A grove melted into the base metal that is a misaligned joint
C) A surface crack
D) A groove melted into base metal left unfilled
  • 5. What is a crater?
A) A buildup of slag in the face of the weld
B) A porosity pocket in the face of the weld
C) A melted rod tip 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 center of weld metal
C) Imaginary line through HAZ boundary
D) Imaginary line through weld toe
  • 7. What is spatter?
A) Arc blow expelled that do not form part of the weld
B) Metal particles expelled that do not form part of the weld
C) Falling flux expelled that do not form part of the weld
D) Gas bubbles 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) Non-metallic material trapped in weld
D) Steel trapped in slag
  • 9. What is a joint?
A) Location where two or more members are joined
B) filler metal
C) The end of the metal piece that is welded first.
D) a welding defect
  • 10. What is a crater crack?
A) A stress fracture formed cause metal was too clean
B) A cold shut
C) A crack in the crater of a weld bead
D) A centerline crack
  • 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) Electrode burn rate is working nonstop
B) Arc stability rating
C) Machine lifespan over a 10 min period
D) Percentage of time welders operate at rated output
  • 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) Weld height
B) Rod penetration
C) Distance fusion extends into base metal
D) Distance bead width extends
  • 15. What is penetration?
A) Bead surface depth
B) Slag depth
C) Arc reach
D) Extent weld metal combines with base metal
  • 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) Purely mechanical process
B) Uses heat of an arc between covered electrode and the work
C) Uses shielding gas
D) Uses tungsten electrode
  • 19. Advantage of SMAW?
A) Portable and inexpensive
B) Fully automated
C) No slag
D) High speed
  • 20. Disadvantage of SMAW?
A) Requires gas bottles
B) It’s slow
C) Cannot weld steel
D) Only works indoors
  • 21. 7018 can use:
A) Neither
B) AC only
C) DC only
D) AC or DC
  • 22. What polarity do we weld with?
A) No polarity
B) Alternating ground
C) Straight polarity
D) Reverse polarity
  • 23. Reverse polarity:
A) Ground floats
B) No polarity exists
C) Electrode is positive, ground negative
D) Electrode negative
  • 24. Two safety points:
A) Avoid using gloves never safety glasses
B) Proper ventilation and protective clothing
C) Use small rods and low heat
D) Always weld outside use sitka gloves
  • 25. SMAW electrode:
A) TIG tungsten
B) MIG wire
C) Consumable electrode covered with flux
D) Carbon rod
  • 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) Welding position
B) Rod length
C) Coating type
D) Positive polarity rod
  • 28. Meaning of 4th digit in 7018:
A) Strength
B) Composition of rod
C) Diameter
D) Arc length
  • 29. Four rod groups:
A) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
B) High carbon, low carbon, stainless, alloy
C) Soft rods, hard rods, hot rods, cold rods
D) Inert, reactive, passive, active
  • 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) sterilize
B) Reduce moisture
C) heat for penetration
D) Prevent Bending
  • 32. Minimum oven temperature?
A) 250°F
B) 100°F
C) 500°F
D) 175°F
  • 33. E stands for:
A) Earth
B) Energy
C) Edge
D) Electrode
  • 34. Rod lengths:
A) 1–2 feet
B) 3–6 inches
C) 20–30 inches
D) 9–18 inches
  • 35. MR or R:
A) Machine ready
B) Moisture resistant
C) Medium rated
D) Metal rod
  • 36. Base metal we use:
A) A36 mild steel
B) Stainless steel
C) Aluminum
D) Cast iron
  • 37. Light produced in welding:
A) Green infrared
B) Electro violet and ultra red light
C) X‑ray emissions
D) Blue spectrum only
  • 38. Five joint types:
A) Curve, twist, bend, fold, lock
B) Root, face, toe, leg, web
C) Lap, butt, edge, corner, T-joint
D) Arc, gas, flux, rod, plate
  • 39. AWS:
A) American Welding Society
B) American Wire Service
C) Arc Welding System
D) Advanced Weld Standards
  • 40. Heat affected zone:
A) Metal melted completely
B) Joint line
C) Metal altered but not melted
D) Slag-covered area
  • 41. PJP:
A) Primary Joint Preparation
B) Pressure Joint Process
C) Partial Joint Penetration
D) Parallel Joint Pass
  • 42. CJP:
A) Central Joint Plane
B) Complete Joint Penetration
C) Controlled Joint Process
D) Cut Joint Position
  • 43. 1F:
A) Flat fillet
B) Vertical fillet
C) Overhead fillet
D) Flat groove
  • 44. 2F
A) Horizontal fillet
B) Vertical groove
C) Flat Fillet
D) Horizontal groove
  • 45. 3F
A) Flat fillet
B) Overhead fillet
C) Horizontal groove
D) Vertical fillet
  • 46. 4F:
A) Vertical fillet
B) Flat groove
C) Overhead fillet
D) Horizontal fillet
  • 47. 1G:
A) Flat groove
B) Vertical groove
C) Overhead groove
D) Flat fillet
  • 48. 2G:
A) Vertical groove
B) Horizontal fillet
C) Horizontal groove
D) Flat groove
  • 49. 3G:
A) Vertical groove
B) Horizontal fillet
C) Overhead groove
D) Flat groove
  • 50. 4G:
A) Flat groove
B) Overhead groove
C) Vertical groove
D) Horizontal fillet
  • 51. Weave:
A) Weld bead made with transverse movement
B) Root buildup
C) Cleaning motion
D) Slag brushing
  • 52. No large amount of ______ should be in the weld
A) Oxygen
B) Mercury
C) Sulphur
D) Hydrogen
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