12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The weld bead
B) The metal to be welded
C) The shielding gas makes sparks
D) The flux coating
  • 2. What is an arc?
A) A joint type that lets light fly around everywhere
B) Light from welding
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) Length of the rod
C) The distance from the gap between plates and the clamp wire
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 surface crack
C) Extra filler metal
D) A grove melted into the base metal that is a misaligned joint
  • 5. What is a crater?
A) A melted rod tip in the face of the weld
B) A depression 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 top of the bead
B) Imaginary line through HAZ boundary
C) Imaginary line through center of weld metal
D) Imaginary line through weld toe
  • 7. What is spatter?
A) Falling flux expelled that do not form part of the weld
B) Gas bubbles 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) Steel trapped in slag
C) Non-metallic material trapped in weld
D) Hot cracks trapped in the weld pool at the end
  • 9. What is a joint?
A) filler metal
B) a welding defect
C) The end of the metal piece that is welded first.
D) Location where two or more members are joined
  • 10. What is a crater crack?
A) A stress fracture formed cause metal was too clean
B) A centerline crack
C) A crack in the crater of a weld bead
D) A cold shut
  • 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) Percentage of time welders operate at rated output
B) Electrode burn rate is working nonstop
C) Machine lifespan over a 10 min period
D) Arc stability rating
  • 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) Distance fusion extends into base metal
B) Distance bead width extends
C) Weld height
D) Rod penetration
  • 15. What is penetration?
A) Slag depth
B) Bead surface 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) Heat generated
D) Length welded per hour
  • 17. What does SMAW stand for?
A) Shielded Metal Arc Welding
B) Shielded Mechanical 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) High speed
B) Portable and inexpensive
C) Fully automated
D) No slag
  • 20. Disadvantage of SMAW?
A) It’s slow
B) Cannot weld steel
C) Requires gas bottles
D) Only works indoors
  • 21. 7018 can use:
A) DC only
B) AC only
C) Neither
D) AC or DC
  • 22. What polarity do we weld with?
A) No polarity
B) Reverse polarity
C) Straight polarity
D) Alternating ground
  • 23. Reverse polarity:
A) Electrode negative
B) Electrode is positive, ground negative
C) Ground floats
D) No polarity exists
  • 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) Consumable electrode covered with flux
B) TIG tungsten
C) Carbon rod
D) MIG wire
  • 26. Strength of 7018 rod:
A) 40k psi
B) 18k psi
C) 120k psi
D) 70k psi
  • 27. Meaning of 3rd digit in 7018:
A) Positive polarity rod
B) Rod length
C) Coating type
D) Welding position
  • 28. Meaning of 4th digit in 7018:
A) Diameter
B) Strength
C) Arc length
D) Composition of rod
  • 29. Four rod groups:
A) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
B) Inert, reactive, passive, active
C) Soft rods, hard rods, hot rods, cold rods
D) High carbon, low carbon, stainless, alloy
  • 30. DCEP:
A) Direct Current Elevated Pressure
B) Dual Current Electrode Phase
C) Direct Current Electrode Positive
D) Direct Coil Energy Pulse
  • 31. Why put rods in oven?
A) Prevent Bending
B) sterilize
C) heat for penetration
D) Reduce moisture
  • 32. Minimum oven temperature?
A) 100°F
B) 250°F
C) 500°F
D) 175°F
  • 33. E stands for:
A) Electrode
B) Energy
C) Earth
D) Edge
  • 34. Rod lengths:
A) 1–2 feet
B) 9–18 inches
C) 20–30 inches
D) 3–6 inches
  • 35. MR or R:
A) Medium rated
B) Machine ready
C) Moisture resistant
D) Metal rod
  • 36. Base metal we use:
A) Aluminum
B) Stainless steel
C) A36 mild steel
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) Arc, gas, flux, rod, plate
D) Lap, butt, edge, corner, T-joint
  • 39. AWS:
A) Arc Welding System
B) Advanced Weld Standards
C) American Welding Society
D) American Wire Service
  • 40. Heat affected zone:
A) Slag-covered area
B) Metal melted completely
C) Metal altered but not melted
D) Joint line
  • 41. PJP:
A) Partial Joint Penetration
B) Parallel Joint Pass
C) Pressure Joint Process
D) Primary Joint Preparation
  • 42. CJP:
A) Complete Joint Penetration
B) Cut Joint Position
C) Central Joint Plane
D) Controlled Joint Process
  • 43. 1F:
A) Overhead fillet
B) Flat fillet
C) Vertical fillet
D) Flat groove
  • 44. 2F
A) Horizontal fillet
B) Horizontal groove
C) Vertical groove
D) Flat Fillet
  • 45. 3F
A) Flat fillet
B) Overhead fillet
C) Horizontal groove
D) Vertical fillet
  • 46. 4F:
A) Overhead fillet
B) Flat groove
C) Horizontal fillet
D) Vertical fillet
  • 47. 1G:
A) Flat fillet
B) Vertical groove
C) Flat groove
D) Overhead groove
  • 48. 2G:
A) Flat groove
B) Vertical groove
C) Horizontal groove
D) Horizontal fillet
  • 49. 3G:
A) Flat groove
B) Overhead groove
C) Vertical groove
D) Horizontal fillet
  • 50. 4G:
A) Flat groove
B) Horizontal fillet
C) Vertical groove
D) Overhead groove
  • 51. Weave:
A) Root buildup
B) Slag brushing
C) Weld bead made with transverse movement
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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