12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The flux coating
B) The shielding gas makes sparks
C) The weld bead
D) The metal to be welded
  • 2. What is an arc?
A) Flow of electricity through a gaseous space or air gap
B) A type of electrode
C) Light from welding
D) A joint type that lets light fly around everywhere
  • 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 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 depression in the face of the weld
B) A melted rod tip in the face of the weld
C) A porosity pocket in the face of the weld
D) A buildup of slag in the face of the weld
  • 6. What is the axis of weld?
A) Imaginary line through HAZ boundary
B) Imaginary line through weld toe
C) Imaginary line through center of weld metal
D) Imaginary line through top of the bead
  • 7. What is spatter?
A) Gas bubbles expelled that do not form part of the weld
B) Metal particles expelled that do not form part of the weld
C) Arc blow expelled that do not form part of the weld
D) Falling flux 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) 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 cold shut
B) A centerline crack
C) A stress fracture formed cause metal was too clean
D) A crack in the crater of a weld bead
  • 11. What is ductility
A) Ability to resist rust
B) Ability to remain cold.
C) Ability to stay magnetized
D) Ability to deform without failure
  • 12. What is duty cycle?
A) Electrode burn rate is working nonstop
B) Machine lifespan over a 10 min period
C) Arc stability rating
D) Percentage of time welders operate at rated output
  • 13. What is filler metal?
A) Metal added to make a welded joint
B) Flux coating
C) Distance fusion extends into base metal
D) Metal base plate
  • 14. What is depth of fusion?
A) Distance bead width extends
B) Weld height
C) Rod penetration
D) Distance fusion extends into base metal
  • 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) Heat generated
B) Length welded per hour
C) Weight of metal deposited per unit time
D) Amount of slag produced
  • 17. What does SMAW stand for?
A) Solid Metal Arc Welding
B) Shielded Mechanical Arc Welding
C) Shielded Metal Arc Welding
D) Stick Metal Arc Work
  • 18. What is SMAW?
A) Uses heat of an arc between covered electrode and the work
B) Uses tungsten electrode
C) Purely mechanical process
D) Uses shielding gas
  • 19. Advantage of SMAW?
A) Fully automated
B) Portable and inexpensive
C) No slag
D) High speed
  • 20. Disadvantage of SMAW?
A) It’s slow
B) Cannot weld steel
C) Only works indoors
D) Requires gas bottles
  • 21. 7018 can use:
A) Neither
B) AC or DC
C) AC only
D) DC only
  • 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) Electrode is positive, ground negative
C) No polarity exists
D) Ground floats
  • 24. Two safety points:
A) Use small rods and low heat
B) Always weld outside use sitka gloves
C) Avoid using gloves never safety glasses
D) Proper ventilation and protective clothing
  • 25. SMAW electrode:
A) Carbon rod
B) TIG tungsten
C) Consumable electrode covered with flux
D) MIG wire
  • 26. Strength of 7018 rod:
A) 18k psi
B) 70k psi
C) 40k psi
D) 120k psi
  • 27. Meaning of 3rd digit in 7018:
A) Rod length
B) Positive polarity rod
C) Welding position
D) Coating type
  • 28. Meaning of 4th digit in 7018:
A) Arc length
B) Strength
C) Diameter
D) Composition of rod
  • 29. Four rod groups:
A) Soft rods, hard rods, hot rods, cold rods
B) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
C) Inert, reactive, passive, active
D) High carbon, low carbon, stainless, alloy
  • 30. DCEP:
A) Direct Current Electrode Positive
B) Direct Current Elevated Pressure
C) Dual Current Electrode Phase
D) Direct Coil Energy Pulse
  • 31. Why put rods in oven?
A) sterilize
B) heat for penetration
C) Prevent Bending
D) Reduce moisture
  • 32. Minimum oven temperature?
A) 500°F
B) 175°F
C) 100°F
D) 250°F
  • 33. E stands for:
A) Edge
B) Electrode
C) Earth
D) Energy
  • 34. Rod lengths:
A) 20–30 inches
B) 9–18 inches
C) 1–2 feet
D) 3–6 inches
  • 35. MR or R:
A) Metal rod
B) Machine ready
C) Moisture resistant
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) Green infrared
B) Electro violet and ultra red light
C) X‑ray emissions
D) Blue spectrum only
  • 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) Arc Welding System
B) American Wire Service
C) American Welding Society
D) Advanced Weld Standards
  • 40. Heat affected zone:
A) Slag-covered area
B) Joint line
C) Metal melted completely
D) Metal altered but not melted
  • 41. PJP:
A) Pressure Joint Process
B) Partial Joint Penetration
C) Primary Joint Preparation
D) Parallel Joint Pass
  • 42. CJP:
A) Controlled Joint Process
B) Central Joint Plane
C) Complete Joint Penetration
D) Cut Joint Position
  • 43. 1F:
A) Flat groove
B) Overhead fillet
C) Flat fillet
D) Vertical fillet
  • 44. 2F
A) Horizontal groove
B) Horizontal fillet
C) Flat Fillet
D) Vertical groove
  • 45. 3F
A) Horizontal groove
B) Vertical fillet
C) Flat fillet
D) Overhead fillet
  • 46. 4F:
A) Overhead fillet
B) Vertical fillet
C) Flat groove
D) Horizontal fillet
  • 47. 1G:
A) Flat fillet
B) Flat groove
C) Overhead groove
D) Vertical groove
  • 48. 2G:
A) Flat groove
B) Horizontal fillet
C) Vertical groove
D) Horizontal groove
  • 49. 3G:
A) Overhead groove
B) Vertical groove
C) Flat groove
D) Horizontal fillet
  • 50. 4G:
A) Horizontal fillet
B) Vertical groove
C) Flat groove
D) Overhead groove
  • 51. Weave:
A) Cleaning motion
B) Slag brushing
C) Root buildup
D) Weld bead made with transverse movement
  • 52. No large amount of ______ should be in the weld
A) Hydrogen
B) Mercury
C) Oxygen
D) Sulphur
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