12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The metal to be welded
B) The weld bead
C) The shielding gas makes sparks
D) The flux coating
  • 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) Length of the rod
C) The distance from the electrode to the weld pool
D) The distance from the gap between plates and the clamp wire
  • 4. What is undercut?
A) A surface crack
B) A grove melted into the base metal that is a misaligned joint
C) A groove melted into base metal left unfilled
D) Extra filler metal
  • 5. What is a crater?
A) A buildup of slag 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 depression in the face of the weld
  • 6. What is the axis of weld?
A) Imaginary line through center of weld metal
B) Imaginary line through HAZ boundary
C) Imaginary line through top of the bead
D) Imaginary line through weld toe
  • 7. What is spatter?
A) Falling flux expelled that do not form part of the weld
B) Metal particles expelled that do not form part of the weld
C) Gas bubbles expelled that do not form part of the weld
D) Arc blow expelled that do not form part of the weld
  • 8. What is slag inclusion?
A) Non-metallic material trapped in weld
B) Hot cracks trapped in the weld pool at the end
C) Undercut failure
D) Steel trapped in slag
  • 9. What is a joint?
A) Location where two or more members are joined
B) filler metal
C) The end of the metal piece that is welded first.
D) a welding defect
  • 10. What is a crater crack?
A) A stress fracture formed cause metal was too clean
B) A crack in the crater of a weld bead
C) A centerline crack
D) A cold shut
  • 11. What is ductility
A) Ability to stay magnetized
B) Ability to deform without failure
C) Ability to remain cold.
D) Ability to resist rust
  • 12. What is duty cycle?
A) Arc stability rating
B) Percentage of time welders operate at rated output
C) Electrode burn rate is working nonstop
D) Machine lifespan over a 10 min period
  • 13. What is filler metal?
A) Metal base plate
B) Metal added to make a welded joint
C) Distance fusion extends into base metal
D) Flux coating
  • 14. What is depth of fusion?
A) Rod penetration
B) Weld height
C) Distance bead width extends
D) Distance fusion extends into base metal
  • 15. What is penetration?
A) Extent weld metal combines with base metal
B) Arc reach
C) Slag depth
D) Bead surface depth
  • 16. What is deposition rate?
A) Length welded per hour
B) Amount of slag produced
C) Weight of metal deposited per unit time
D) Heat generated
  • 17. What does SMAW stand for?
A) Shielded Metal Arc Welding
B) Solid Metal Arc Welding
C) Shielded Mechanical 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) Portable and inexpensive
B) Fully automated
C) High speed
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) Neither
B) AC or DC
C) AC only
D) DC only
  • 22. What polarity do we weld with?
A) Alternating ground
B) Straight polarity
C) No polarity
D) Reverse polarity
  • 23. Reverse polarity:
A) Ground floats
B) No polarity exists
C) Electrode is positive, ground negative
D) Electrode negative
  • 24. Two safety points:
A) Always weld outside use sitka gloves
B) Use small rods and low heat
C) Proper ventilation and protective clothing
D) Avoid using gloves never safety glasses
  • 25. SMAW electrode:
A) TIG tungsten
B) MIG wire
C) Carbon rod
D) Consumable electrode covered with flux
  • 26. Strength of 7018 rod:
A) 120k psi
B) 70k psi
C) 18k psi
D) 40k psi
  • 27. Meaning of 3rd digit in 7018:
A) Coating type
B) Rod length
C) Positive polarity rod
D) Welding position
  • 28. Meaning of 4th digit in 7018:
A) Strength
B) Arc length
C) Composition of rod
D) Diameter
  • 29. Four rod groups:
A) Inert, reactive, passive, active
B) High carbon, low carbon, stainless, alloy
C) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
D) Soft rods, hard rods, hot rods, cold rods
  • 30. DCEP:
A) Direct Current Elevated Pressure
B) Direct Current Electrode Positive
C) Dual Current Electrode Phase
D) Direct Coil Energy Pulse
  • 31. Why put rods in oven?
A) heat for penetration
B) sterilize
C) Prevent Bending
D) Reduce moisture
  • 32. Minimum oven temperature?
A) 100°F
B) 175°F
C) 250°F
D) 500°F
  • 33. E stands for:
A) Edge
B) Earth
C) Energy
D) Electrode
  • 34. Rod lengths:
A) 3–6 inches
B) 1–2 feet
C) 20–30 inches
D) 9–18 inches
  • 35. MR or R:
A) Moisture resistant
B) Metal rod
C) Machine ready
D) Medium rated
  • 36. Base metal we use:
A) Aluminum
B) Cast iron
C) A36 mild steel
D) Stainless steel
  • 37. Light produced in welding:
A) Green infrared
B) X‑ray emissions
C) Electro violet and ultra red light
D) Blue spectrum only
  • 38. Five joint types:
A) Arc, gas, flux, rod, plate
B) Curve, twist, bend, fold, lock
C) Root, face, toe, leg, web
D) Lap, butt, edge, corner, T-joint
  • 39. AWS:
A) Arc Welding System
B) Advanced Weld Standards
C) American Wire Service
D) American Welding Society
  • 40. Heat affected zone:
A) Metal melted completely
B) Metal altered but not melted
C) Slag-covered area
D) Joint line
  • 41. PJP:
A) Partial Joint Penetration
B) Pressure Joint Process
C) Primary Joint Preparation
D) Parallel Joint Pass
  • 42. CJP:
A) Controlled Joint Process
B) Complete Joint Penetration
C) Cut Joint Position
D) Central Joint Plane
  • 43. 1F:
A) Flat fillet
B) Vertical fillet
C) Flat groove
D) Overhead fillet
  • 44. 2F
A) Vertical groove
B) Horizontal fillet
C) Horizontal groove
D) Flat Fillet
  • 45. 3F
A) Flat fillet
B) Horizontal groove
C) Overhead fillet
D) Vertical fillet
  • 46. 4F:
A) Horizontal fillet
B) Vertical fillet
C) Flat groove
D) Overhead fillet
  • 47. 1G:
A) Overhead groove
B) Flat groove
C) Flat fillet
D) Vertical groove
  • 48. 2G:
A) Horizontal fillet
B) Vertical groove
C) Flat groove
D) Horizontal groove
  • 49. 3G:
A) Vertical groove
B) Overhead groove
C) Flat groove
D) Horizontal fillet
  • 50. 4G:
A) Vertical groove
B) Horizontal fillet
C) Flat groove
D) Overhead groove
  • 51. Weave:
A) Slag brushing
B) Root buildup
C) Weld bead made with transverse movement
D) Cleaning motion
  • 52. No large amount of ______ should be in the weld
A) Mercury
B) Oxygen
C) Hydrogen
D) Sulphur
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