12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The flux coating
B) The metal to be welded
C) The weld bead
D) The shielding gas makes sparks
  • 2. What is an arc?
A) Flow of electricity through a gaseous space or air gap
B) A type of electrode
C) A joint type that lets light fly around everywhere
D) Light from welding
  • 3. What is arc length?
A) The distance from the gap between plates and the clamp wire
B) Length of the rod
C) The distance from the electrode to the weld pool
D) Length of the weld
  • 4. What is undercut?
A) A surface crack
B) A grove melted into the base metal that is a misaligned joint
C) Extra filler metal
D) A groove melted into base metal left unfilled
  • 5. What is a crater?
A) A porosity pocket 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 melted rod tip 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 weld toe
D) Imaginary line through HAZ boundary
  • 7. What is spatter?
A) Gas bubbles expelled that do not form part of the weld
B) Falling flux expelled that do not form part of the weld
C) Arc blow 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) Undercut failure
B) Hot cracks trapped in the weld pool at the end
C) Non-metallic material trapped in weld
D) Steel trapped in slag
  • 9. What is a joint?
A) a welding defect
B) filler metal
C) Location where two or more members are joined
D) The end of the metal piece that is welded first.
  • 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 resist rust
B) Ability to deform without failure
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 base plate
C) Metal added to make a welded joint
D) Flux coating
  • 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) Bead surface depth
B) Slag depth
C) Extent weld metal combines with base metal
D) Arc reach
  • 16. What is deposition rate?
A) Amount of slag produced
B) Length welded per hour
C) Heat generated
D) Weight of metal deposited per unit time
  • 17. What does SMAW stand for?
A) Solid Metal Arc Welding
B) Stick Metal Arc Work
C) Shielded Mechanical Arc Welding
D) Shielded Metal Arc Welding
  • 18. What is SMAW?
A) Uses shielding gas
B) Uses tungsten electrode
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) Portable and inexpensive
D) Fully automated
  • 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) AC or DC
B) AC only
C) Neither
D) DC only
  • 22. What polarity do we weld with?
A) Alternating ground
B) No polarity
C) Straight polarity
D) Reverse 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) Proper ventilation and protective clothing
C) Avoid using gloves never safety glasses
D) Always weld outside use sitka gloves
  • 25. SMAW electrode:
A) MIG wire
B) TIG tungsten
C) Carbon rod
D) Consumable electrode covered with flux
  • 26. Strength of 7018 rod:
A) 18k psi
B) 40k psi
C) 70k psi
D) 120k psi
  • 27. Meaning of 3rd digit in 7018:
A) Rod length
B) Welding position
C) Positive polarity rod
D) Coating type
  • 28. Meaning of 4th digit in 7018:
A) Strength
B) Arc length
C) Diameter
D) Composition of rod
  • 29. Four rod groups:
A) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
B) High carbon, low carbon, stainless, alloy
C) Inert, reactive, passive, active
D) Soft rods, hard rods, hot rods, cold rods
  • 30. DCEP:
A) Direct Current Electrode Positive
B) Dual Current Electrode Phase
C) Direct Current Elevated Pressure
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) Electrode
B) Earth
C) Energy
D) Edge
  • 34. Rod lengths:
A) 9–18 inches
B) 20–30 inches
C) 1–2 feet
D) 3–6 inches
  • 35. MR or R:
A) Moisture resistant
B) Machine ready
C) Metal rod
D) Medium rated
  • 36. Base metal we use:
A) Stainless steel
B) Cast iron
C) A36 mild steel
D) Aluminum
  • 37. Light produced in welding:
A) Green infrared
B) X‑ray emissions
C) Blue spectrum only
D) Electro violet and ultra red light
  • 38. Five joint types:
A) Arc, gas, flux, rod, plate
B) Lap, butt, edge, corner, T-joint
C) Curve, twist, bend, fold, lock
D) Root, face, toe, leg, web
  • 39. AWS:
A) Advanced Weld Standards
B) American Welding Society
C) American Wire Service
D) Arc Welding System
  • 40. Heat affected zone:
A) Metal melted completely
B) Slag-covered area
C) Metal altered but not melted
D) Joint line
  • 41. PJP:
A) Pressure Joint Process
B) Parallel Joint Pass
C) Primary Joint Preparation
D) Partial Joint Penetration
  • 42. CJP:
A) Cut Joint Position
B) Controlled Joint Process
C) Complete Joint Penetration
D) Central Joint Plane
  • 43. 1F:
A) Vertical fillet
B) Flat fillet
C) Overhead fillet
D) Flat groove
  • 44. 2F
A) Vertical groove
B) Horizontal fillet
C) Flat Fillet
D) Horizontal groove
  • 45. 3F
A) Vertical fillet
B) Flat fillet
C) Overhead fillet
D) Horizontal groove
  • 46. 4F:
A) Overhead fillet
B) Flat groove
C) Horizontal fillet
D) Vertical fillet
  • 47. 1G:
A) Flat groove
B) Flat fillet
C) Vertical groove
D) Overhead groove
  • 48. 2G:
A) Flat groove
B) Horizontal fillet
C) Vertical groove
D) Horizontal groove
  • 49. 3G:
A) Horizontal fillet
B) Vertical groove
C) Flat groove
D) Overhead groove
  • 50. 4G:
A) Vertical groove
B) Flat groove
C) Horizontal fillet
D) Overhead groove
  • 51. Weave:
A) Slag brushing
B) Cleaning motion
C) Weld bead made with transverse movement
D) Root buildup
  • 52. No large amount of ______ should be in the weld
A) Sulphur
B) Mercury
C) Oxygen
D) Hydrogen
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