12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The shielding gas makes sparks
B) The weld bead
C) The flux coating
D) The metal to be welded
  • 2. What is an arc?
A) Flow of electricity through a gaseous space or air gap
B) A joint type that lets light fly around everywhere
C) A type of electrode
D) Light from welding
  • 3. What is arc length?
A) Length of the rod
B) The distance from the gap between plates and the clamp wire
C) Length of the weld
D) The distance from the electrode to the weld pool
  • 4. What is undercut?
A) A surface crack
B) A groove melted into base metal left unfilled
C) Extra filler metal
D) A grove melted into the base metal that is a misaligned joint
  • 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 melted rod tip 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 weld toe
B) Imaginary line through HAZ boundary
C) Imaginary line through center of weld metal
D) Imaginary line through top of the bead
  • 7. What is spatter?
A) Arc blow expelled that do not form part of the weld
B) Gas bubbles expelled that do not form part of the weld
C) Falling flux 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) Non-metallic material trapped in weld
C) Steel trapped in slag
D) Hot cracks trapped in the weld pool at the end
  • 9. What is a joint?
A) filler metal
B) Location where two or more members are joined
C) The end of the metal piece that is welded first.
D) a welding defect
  • 10. What is a crater crack?
A) A centerline crack
B) A crack in the crater of a weld bead
C) A cold shut
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) Electrode burn rate is working nonstop
B) Machine lifespan over a 10 min period
C) Percentage of time welders operate at rated output
D) Arc stability rating
  • 13. What is filler metal?
A) Distance fusion extends into base metal
B) Metal base plate
C) Flux coating
D) Metal added to make a welded joint
  • 14. What is depth of fusion?
A) Rod penetration
B) Distance bead width extends
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) Bead surface depth
D) Arc reach
  • 16. What is deposition rate?
A) Length welded per hour
B) Amount of slag produced
C) Heat generated
D) Weight of metal deposited per unit time
  • 17. What does SMAW stand for?
A) Shielded Mechanical Arc Welding
B) Solid Metal Arc Welding
C) Stick Metal Arc Work
D) Shielded Metal Arc Welding
  • 18. What is SMAW?
A) Uses shielding gas
B) Purely mechanical process
C) Uses tungsten electrode
D) Uses heat of an arc between covered electrode and the work
  • 19. Advantage of SMAW?
A) Fully automated
B) Portable and inexpensive
C) High speed
D) No slag
  • 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) Alternating ground
B) Straight polarity
C) No polarity
D) Reverse polarity
  • 23. Reverse polarity:
A) Electrode is positive, ground negative
B) Electrode negative
C) Ground floats
D) No polarity exists
  • 24. Two safety points:
A) Proper ventilation and protective clothing
B) Always weld outside use sitka gloves
C) Avoid using gloves never safety glasses
D) Use small rods and low heat
  • 25. SMAW electrode:
A) TIG tungsten
B) Carbon rod
C) Consumable electrode covered with flux
D) MIG wire
  • 26. Strength of 7018 rod:
A) 120k psi
B) 70k psi
C) 40k psi
D) 18k psi
  • 27. Meaning of 3rd digit in 7018:
A) Positive polarity rod
B) Coating type
C) Welding position
D) Rod length
  • 28. Meaning of 4th digit in 7018:
A) Composition of rod
B) Strength
C) Arc length
D) Diameter
  • 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) Dual Current Electrode Phase
B) Direct Current Elevated Pressure
C) Direct Coil Energy Pulse
D) Direct Current Electrode Positive
  • 31. Why put rods in oven?
A) sterilize
B) heat for penetration
C) Reduce moisture
D) Prevent Bending
  • 32. Minimum oven temperature?
A) 500°F
B) 250°F
C) 100°F
D) 175°F
  • 33. E stands for:
A) Edge
B) Energy
C) Earth
D) Electrode
  • 34. Rod lengths:
A) 9–18 inches
B) 1–2 feet
C) 3–6 inches
D) 20–30 inches
  • 35. MR or R:
A) Medium rated
B) Metal rod
C) Machine ready
D) Moisture resistant
  • 36. Base metal we use:
A) Aluminum
B) Stainless steel
C) A36 mild steel
D) Cast iron
  • 37. Light produced in welding:
A) X‑ray emissions
B) Green infrared
C) Blue spectrum only
D) Electro violet and ultra red light
  • 38. Five joint types:
A) Lap, butt, edge, corner, T-joint
B) Root, face, toe, leg, web
C) Curve, twist, bend, fold, lock
D) Arc, gas, flux, rod, plate
  • 39. AWS:
A) Arc Welding System
B) American Welding Society
C) American Wire Service
D) Advanced Weld Standards
  • 40. Heat affected zone:
A) Slag-covered area
B) Metal altered but not melted
C) Joint line
D) Metal melted completely
  • 41. PJP:
A) Parallel Joint Pass
B) Primary Joint Preparation
C) Pressure Joint Process
D) Partial Joint Penetration
  • 42. CJP:
A) Cut Joint Position
B) Complete Joint Penetration
C) Central Joint Plane
D) Controlled Joint Process
  • 43. 1F:
A) Flat fillet
B) Overhead fillet
C) Vertical fillet
D) Flat groove
  • 44. 2F
A) Flat Fillet
B) Horizontal groove
C) Vertical groove
D) Horizontal fillet
  • 45. 3F
A) Flat fillet
B) Horizontal groove
C) Overhead fillet
D) Vertical fillet
  • 46. 4F:
A) Horizontal fillet
B) Vertical fillet
C) Overhead fillet
D) Flat groove
  • 47. 1G:
A) Flat fillet
B) Overhead groove
C) Vertical groove
D) Flat groove
  • 48. 2G:
A) Horizontal groove
B) Flat groove
C) Horizontal fillet
D) Vertical groove
  • 49. 3G:
A) Flat groove
B) Vertical groove
C) Horizontal fillet
D) Overhead groove
  • 50. 4G:
A) Horizontal fillet
B) Overhead groove
C) Vertical groove
D) Flat groove
  • 51. Weave:
A) Cleaning motion
B) Weld bead made with transverse movement
C) Root buildup
D) Slag brushing
  • 52. No large amount of ______ should be in the weld
A) Sulphur
B) Mercury
C) Oxygen
D) Hydrogen
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