12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The shielding gas makes sparks
B) The metal to be welded
C) The weld bead
D) The flux coating
  • 2. What is an arc?
A) Flow of electricity through a gaseous space or air gap
B) Light from welding
C) A joint type that lets light fly around everywhere
D) A type of electrode
  • 3. What is arc length?
A) The distance from the electrode to the weld pool
B) Length of the weld
C) The distance from the gap between plates and the clamp wire
D) Length of the rod
  • 4. What is undercut?
A) A grove melted into the base metal that is a misaligned joint
B) A surface crack
C) Extra filler metal
D) A groove melted into base metal left unfilled
  • 5. What is a crater?
A) A depression 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 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) Metal particles 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) Falling flux expelled that do not form part of the weld
  • 8. What is slag inclusion?
A) Non-metallic material trapped in weld
B) Steel trapped in slag
C) Undercut failure
D) Hot cracks trapped in the weld pool at the end
  • 9. What is a joint?
A) Location where two or more members are joined
B) a welding defect
C) The end of the metal piece that is welded first.
D) filler metal
  • 10. What is a crater crack?
A) A cold shut
B) A stress fracture formed cause metal was too clean
C) A crack in the crater of a weld bead
D) A centerline crack
  • 11. What is ductility
A) Ability to deform without failure
B) Ability to stay magnetized
C) Ability to remain cold.
D) Ability to resist rust
  • 12. What is duty cycle?
A) Machine lifespan over a 10 min period
B) Electrode burn rate is working nonstop
C) Percentage of time welders operate at rated output
D) Arc stability rating
  • 13. What is filler metal?
A) Metal base plate
B) Metal added to make a welded joint
C) Flux coating
D) Distance fusion extends into base metal
  • 14. What is depth of fusion?
A) Distance bead width extends
B) Distance fusion extends into base metal
C) Weld height
D) Rod penetration
  • 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) Amount of slag produced
B) Length welded per hour
C) Weight of metal deposited per unit time
D) Heat generated
  • 17. What does SMAW stand for?
A) Shielded Metal Arc Welding
B) Stick Metal Arc Work
C) Solid 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 tungsten electrode
D) Uses shielding gas
  • 19. Advantage of SMAW?
A) Fully automated
B) High speed
C) No slag
D) Portable and inexpensive
  • 20. Disadvantage of SMAW?
A) Requires gas bottles
B) Cannot weld steel
C) Only works indoors
D) It’s slow
  • 21. 7018 can use:
A) AC or DC
B) DC only
C) Neither
D) AC only
  • 22. What polarity do we weld with?
A) Reverse polarity
B) Straight polarity
C) No polarity
D) Alternating ground
  • 23. Reverse polarity:
A) Electrode negative
B) No polarity exists
C) Electrode is positive, ground negative
D) Ground floats
  • 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) MIG wire
B) Carbon rod
C) Consumable electrode covered with flux
D) TIG tungsten
  • 26. Strength of 7018 rod:
A) 18k psi
B) 70k psi
C) 120k psi
D) 40k psi
  • 27. Meaning of 3rd digit in 7018:
A) Coating type
B) Positive polarity rod
C) Welding position
D) Rod length
  • 28. Meaning of 4th digit in 7018:
A) Composition of rod
B) Diameter
C) Strength
D) Arc length
  • 29. Four rod groups:
A) High carbon, low carbon, stainless, alloy
B) Soft rods, hard rods, hot rods, cold rods
C) Inert, reactive, passive, active
D) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
  • 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) Prevent Bending
C) heat for penetration
D) sterilize
  • 32. Minimum oven temperature?
A) 100°F
B) 175°F
C) 250°F
D) 500°F
  • 33. E stands for:
A) Edge
B) Energy
C) Electrode
D) Earth
  • 34. Rod lengths:
A) 1–2 feet
B) 3–6 inches
C) 9–18 inches
D) 20–30 inches
  • 35. MR or R:
A) Moisture resistant
B) Machine ready
C) Metal rod
D) Medium rated
  • 36. Base metal we use:
A) Aluminum
B) Stainless steel
C) A36 mild steel
D) Cast iron
  • 37. Light produced in welding:
A) Blue spectrum only
B) Electro violet and ultra red light
C) X‑ray emissions
D) Green infrared
  • 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 Wire Service
C) American Welding Society
D) Arc Welding System
  • 40. Heat affected zone:
A) Slag-covered area
B) Joint line
C) Metal altered but not melted
D) Metal melted completely
  • 41. PJP:
A) Partial Joint Penetration
B) Pressure Joint Process
C) Primary Joint Preparation
D) Parallel Joint Pass
  • 42. CJP:
A) Central Joint Plane
B) Cut Joint Position
C) Complete Joint Penetration
D) Controlled Joint Process
  • 43. 1F:
A) Flat fillet
B) Overhead fillet
C) Flat groove
D) Vertical fillet
  • 44. 2F
A) Horizontal fillet
B) Flat Fillet
C) Vertical groove
D) Horizontal groove
  • 45. 3F
A) Overhead fillet
B) Horizontal groove
C) Flat fillet
D) Vertical fillet
  • 46. 4F:
A) Flat groove
B) Horizontal fillet
C) Overhead fillet
D) Vertical fillet
  • 47. 1G:
A) Vertical groove
B) Flat groove
C) Flat fillet
D) Overhead groove
  • 48. 2G:
A) Flat groove
B) Horizontal groove
C) Vertical groove
D) Horizontal fillet
  • 49. 3G:
A) Vertical groove
B) Flat groove
C) Horizontal fillet
D) Overhead groove
  • 50. 4G:
A) Flat groove
B) Vertical groove
C) Horizontal fillet
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) Oxygen
B) Hydrogen
C) Sulphur
D) Mercury
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