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 flux coating
D) The shielding gas makes sparks
  • 2. What is an arc?
A) Light from welding
B) A joint type that lets light fly around everywhere
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 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) Extra filler metal
B) A surface crack
C) A groove melted into base metal left unfilled
D) A grove melted into the base metal that is a misaligned joint
  • 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 depression in the face of the weld
D) A melted rod tip 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 top of the bead
D) Imaginary line through weld toe
  • 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) Metal particles 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) Undercut failure
B) Hot cracks trapped in the weld pool at the end
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) a welding defect
C) The end of the metal piece that is welded first.
D) filler metal
  • 10. What is a crater crack?
A) A centerline crack
B) A cold shut
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 remain cold.
B) Ability to resist rust
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) Arc stability rating
D) Electrode burn rate is working nonstop
  • 13. What is filler metal?
A) Distance fusion extends into base metal
B) Flux coating
C) Metal added to make a welded joint
D) Metal base plate
  • 14. What is depth of fusion?
A) Distance bead width extends
B) Rod penetration
C) Distance fusion extends into base metal
D) Weld height
  • 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) 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 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) No slag
C) Fully automated
D) High speed
  • 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) Neither
C) AC only
D) AC or DC
  • 22. What polarity do we weld with?
A) No polarity
B) Alternating ground
C) Reverse polarity
D) Straight polarity
  • 23. Reverse polarity:
A) No polarity exists
B) Electrode is positive, ground negative
C) Electrode negative
D) Ground floats
  • 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) Carbon rod
B) Consumable electrode covered with flux
C) MIG wire
D) TIG tungsten
  • 26. Strength of 7018 rod:
A) 120k psi
B) 40k psi
C) 70k psi
D) 18k psi
  • 27. Meaning of 3rd digit in 7018:
A) Rod length
B) Coating type
C) Welding position
D) Positive polarity rod
  • 28. Meaning of 4th digit in 7018:
A) Diameter
B) Arc length
C) Strength
D) Composition of rod
  • 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) 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) Prevent Bending
B) heat for penetration
C) sterilize
D) Reduce moisture
  • 32. Minimum oven temperature?
A) 175°F
B) 250°F
C) 100°F
D) 500°F
  • 33. E stands for:
A) Electrode
B) Energy
C) Edge
D) Earth
  • 34. Rod lengths:
A) 20–30 inches
B) 3–6 inches
C) 1–2 feet
D) 9–18 inches
  • 35. MR or R:
A) Machine ready
B) Moisture resistant
C) Metal rod
D) Medium rated
  • 36. Base metal we use:
A) A36 mild steel
B) Aluminum
C) Cast iron
D) Stainless steel
  • 37. Light produced in welding:
A) Blue spectrum only
B) Green infrared
C) X‑ray emissions
D) Electro violet and ultra red light
  • 38. Five joint types:
A) Root, face, toe, leg, web
B) Curve, twist, bend, fold, lock
C) Lap, butt, edge, corner, T-joint
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) Slag-covered area
B) Metal altered but not melted
C) Metal melted completely
D) Joint line
  • 41. PJP:
A) Primary Joint Preparation
B) Parallel Joint Pass
C) Partial Joint Penetration
D) Pressure Joint Process
  • 42. CJP:
A) Cut Joint Position
B) Complete Joint Penetration
C) Central Joint Plane
D) Controlled Joint Process
  • 43. 1F:
A) Flat groove
B) Vertical fillet
C) Overhead fillet
D) Flat fillet
  • 44. 2F
A) Horizontal groove
B) Flat Fillet
C) Vertical groove
D) Horizontal fillet
  • 45. 3F
A) Flat fillet
B) Vertical fillet
C) Horizontal groove
D) Overhead fillet
  • 46. 4F:
A) Overhead fillet
B) Flat groove
C) Horizontal fillet
D) Vertical fillet
  • 47. 1G:
A) Overhead groove
B) Vertical groove
C) Flat fillet
D) Flat groove
  • 48. 2G:
A) Horizontal groove
B) Vertical groove
C) Flat groove
D) Horizontal fillet
  • 49. 3G:
A) Vertical groove
B) Overhead groove
C) Flat groove
D) Horizontal fillet
  • 50. 4G:
A) Overhead groove
B) Vertical groove
C) Horizontal fillet
D) Flat 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) Sulphur
B) Mercury
C) Oxygen
D) Hydrogen
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