12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The weld bead
B) The shielding gas makes sparks
C) The metal to be welded
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) 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 grove melted into the base metal that is a misaligned joint
B) A groove melted into base metal left unfilled
C) A surface crack
D) Extra filler metal
  • 5. What is a crater?
A) A melted rod tip in the face of the weld
B) A buildup of slag in the face of the weld
C) A porosity pocket 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 weld toe
C) Imaginary line through HAZ boundary
D) Imaginary line through center of weld metal
  • 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) Non-metallic material trapped in weld
B) Undercut failure
C) Hot cracks trapped in the weld pool at the end
D) Steel trapped in slag
  • 9. What is a joint?
A) Location where two or more members are joined
B) The end of the metal piece that is welded first.
C) filler metal
D) a welding defect
  • 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 stay magnetized
C) Ability to resist rust
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) Electrode burn rate is working nonstop
D) Arc stability rating
  • 13. What is filler metal?
A) Flux coating
B) Distance fusion extends into base metal
C) Metal base plate
D) Metal added to make a welded joint
  • 14. What is depth of fusion?
A) Distance bead width extends
B) Rod penetration
C) Weld height
D) Distance fusion extends into base metal
  • 15. What is penetration?
A) Slag depth
B) Extent weld metal combines with base metal
C) Arc reach
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) Stick Metal Arc Work
B) Solid Metal Arc Welding
C) Shielded Metal Arc Welding
D) Shielded Mechanical Arc Welding
  • 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) Fully automated
C) No slag
D) Portable and inexpensive
  • 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) AC only
C) Neither
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) Electrode is positive, ground negative
B) Ground floats
C) No polarity exists
D) Electrode negative
  • 24. Two safety points:
A) Use small rods and low heat
B) Avoid using gloves never safety glasses
C) Always weld outside use sitka gloves
D) Proper ventilation and protective clothing
  • 25. SMAW electrode:
A) Consumable electrode covered with flux
B) Carbon rod
C) MIG wire
D) TIG tungsten
  • 26. Strength of 7018 rod:
A) 40k psi
B) 120k psi
C) 18k psi
D) 70k psi
  • 27. Meaning of 3rd digit in 7018:
A) Positive polarity rod
B) Coating type
C) Rod length
D) Welding position
  • 28. Meaning of 4th digit in 7018:
A) Arc length
B) Diameter
C) Composition of rod
D) Strength
  • 29. Four rod groups:
A) Inert, reactive, passive, active
B) Soft rods, hard rods, hot rods, cold rods
C) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
D) High carbon, low carbon, stainless, alloy
  • 30. DCEP:
A) Direct Coil Energy Pulse
B) Dual Current Electrode Phase
C) Direct Current Electrode Positive
D) Direct Current Elevated Pressure
  • 31. Why put rods in oven?
A) Reduce moisture
B) heat for penetration
C) Prevent Bending
D) sterilize
  • 32. Minimum oven temperature?
A) 250°F
B) 175°F
C) 100°F
D) 500°F
  • 33. E stands for:
A) Earth
B) Edge
C) Energy
D) Electrode
  • 34. Rod lengths:
A) 20–30 inches
B) 3–6 inches
C) 1–2 feet
D) 9–18 inches
  • 35. MR or R:
A) Metal rod
B) Moisture resistant
C) Medium rated
D) Machine ready
  • 36. Base metal we use:
A) Aluminum
B) A36 mild steel
C) Stainless steel
D) Cast iron
  • 37. Light produced in welding:
A) Electro violet and ultra red light
B) Blue spectrum only
C) X‑ray emissions
D) Green infrared
  • 38. Five joint types:
A) Lap, butt, edge, corner, T-joint
B) Arc, gas, flux, rod, plate
C) Curve, twist, bend, fold, lock
D) Root, face, toe, leg, web
  • 39. AWS:
A) American Welding Society
B) American Wire Service
C) Advanced Weld Standards
D) Arc Welding System
  • 40. Heat affected zone:
A) Slag-covered area
B) Metal melted completely
C) Metal altered but not melted
D) Joint line
  • 41. PJP:
A) Pressure Joint Process
B) Primary Joint Preparation
C) Partial Joint Penetration
D) Parallel Joint Pass
  • 42. CJP:
A) Controlled Joint Process
B) Cut Joint Position
C) Central Joint Plane
D) Complete Joint Penetration
  • 43. 1F:
A) Overhead fillet
B) Flat fillet
C) Vertical fillet
D) Flat groove
  • 44. 2F
A) Vertical groove
B) Horizontal groove
C) Horizontal fillet
D) Flat Fillet
  • 45. 3F
A) Horizontal groove
B) Vertical fillet
C) Flat fillet
D) Overhead fillet
  • 46. 4F:
A) Flat groove
B) Vertical fillet
C) Horizontal fillet
D) Overhead fillet
  • 47. 1G:
A) Vertical groove
B) Overhead groove
C) Flat fillet
D) Flat groove
  • 48. 2G:
A) Horizontal fillet
B) Horizontal groove
C) Vertical groove
D) Flat groove
  • 49. 3G:
A) Flat groove
B) Overhead groove
C) Vertical groove
D) Horizontal fillet
  • 50. 4G:
A) Vertical groove
B) Overhead groove
C) Horizontal fillet
D) Flat groove
  • 51. Weave:
A) Slag brushing
B) Root buildup
C) Cleaning motion
D) Weld bead made with transverse movement
  • 52. No large amount of ______ should be in the weld
A) Oxygen
B) Hydrogen
C) Sulphur
D) Mercury
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