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 flux coating
D) The weld bead
  • 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) The distance from the gap between plates and the clamp wire
B) Length of the rod
C) Length of the weld
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 grove melted into the base metal that is a misaligned joint
C) Extra filler metal
D) A surface crack
  • 5. What is a crater?
A) A melted rod tip in the face of the weld
B) A porosity pocket in the face of the weld
C) A buildup of slag 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) Metal particles expelled that do not form part of the weld
B) Falling flux expelled that do not form part of the weld
C) Arc blow 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) Hot cracks trapped in the weld pool at the end
B) Steel trapped in slag
C) Undercut failure
D) Non-metallic material trapped in weld
  • 9. What is a joint?
A) filler metal
B) The end of the metal piece that is welded first.
C) a welding defect
D) Location where two or more members are joined
  • 10. What is a crater crack?
A) A crack in the crater of a weld bead
B) A stress fracture formed cause metal was too clean
C) A centerline crack
D) A cold shut
  • 11. What is ductility
A) Ability to stay magnetized
B) Ability to remain cold.
C) Ability to resist rust
D) Ability to deform without failure
  • 12. What is duty cycle?
A) Machine lifespan over a 10 min period
B) Percentage of time welders operate at rated output
C) Arc stability rating
D) Electrode burn rate is working nonstop
  • 13. What is filler metal?
A) Metal added to make a welded joint
B) Metal base plate
C) Distance fusion extends into base metal
D) Flux coating
  • 14. What is depth of fusion?
A) Weld height
B) Distance fusion extends into base metal
C) Rod penetration
D) Distance bead width extends
  • 15. What is penetration?
A) Arc reach
B) Bead surface depth
C) Slag depth
D) Extent weld metal combines with base metal
  • 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) Solid Metal Arc Welding
B) Shielded Metal Arc Welding
C) Shielded Mechanical Arc Welding
D) Stick Metal Arc Work
  • 18. What is SMAW?
A) Uses tungsten electrode
B) Purely mechanical process
C) Uses heat of an arc between covered electrode and the work
D) Uses shielding gas
  • 19. Advantage of SMAW?
A) High speed
B) Fully automated
C) Portable and inexpensive
D) No slag
  • 20. Disadvantage of SMAW?
A) Cannot weld steel
B) Requires gas bottles
C) Only works indoors
D) It’s slow
  • 21. 7018 can use:
A) AC only
B) AC or DC
C) Neither
D) DC only
  • 22. What polarity do we weld with?
A) No polarity
B) Straight polarity
C) Reverse polarity
D) Alternating ground
  • 23. Reverse polarity:
A) Ground floats
B) No polarity exists
C) Electrode is positive, ground negative
D) Electrode negative
  • 24. Two safety points:
A) Avoid using gloves never safety glasses
B) Use small rods and low heat
C) Proper ventilation and protective clothing
D) Always weld outside use sitka gloves
  • 25. SMAW electrode:
A) TIG tungsten
B) Consumable electrode covered with flux
C) MIG wire
D) Carbon rod
  • 26. Strength of 7018 rod:
A) 18k psi
B) 120k psi
C) 70k psi
D) 40k psi
  • 27. Meaning of 3rd digit in 7018:
A) Rod length
B) Welding position
C) Coating type
D) Positive polarity rod
  • 28. Meaning of 4th digit in 7018:
A) Composition of rod
B) Strength
C) Diameter
D) Arc length
  • 29. Four rod groups:
A) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
B) Soft rods, hard rods, hot rods, cold rods
C) Inert, reactive, passive, active
D) High carbon, low carbon, stainless, alloy
  • 30. DCEP:
A) Direct Current Elevated Pressure
B) Direct Coil Energy Pulse
C) Dual Current Electrode Phase
D) Direct Current Electrode Positive
  • 31. Why put rods in oven?
A) heat for penetration
B) Reduce moisture
C) Prevent Bending
D) sterilize
  • 32. Minimum oven temperature?
A) 500°F
B) 100°F
C) 175°F
D) 250°F
  • 33. E stands for:
A) Energy
B) Earth
C) Edge
D) Electrode
  • 34. Rod lengths:
A) 3–6 inches
B) 1–2 feet
C) 9–18 inches
D) 20–30 inches
  • 35. MR or R:
A) Medium rated
B) Metal rod
C) Moisture resistant
D) Machine ready
  • 36. Base metal we use:
A) A36 mild steel
B) Cast iron
C) Aluminum
D) Stainless steel
  • 37. Light produced in welding:
A) Blue spectrum only
B) X‑ray emissions
C) Green infrared
D) Electro violet and ultra red light
  • 38. Five joint types:
A) Root, face, toe, leg, web
B) Arc, gas, flux, rod, plate
C) Lap, butt, edge, corner, T-joint
D) Curve, twist, bend, fold, lock
  • 39. AWS:
A) American Welding Society
B) Advanced Weld Standards
C) Arc Welding System
D) American Wire Service
  • 40. Heat affected zone:
A) Joint line
B) Metal melted completely
C) Metal altered but not melted
D) Slag-covered area
  • 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) Cut Joint Position
C) Complete Joint Penetration
D) Central Joint Plane
  • 43. 1F:
A) Vertical fillet
B) Flat fillet
C) Flat groove
D) Overhead fillet
  • 44. 2F
A) Horizontal fillet
B) Flat Fillet
C) Horizontal groove
D) Vertical groove
  • 45. 3F
A) Horizontal groove
B) Vertical fillet
C) Overhead fillet
D) Flat fillet
  • 46. 4F:
A) Horizontal fillet
B) Overhead fillet
C) Flat groove
D) Vertical fillet
  • 47. 1G:
A) Overhead groove
B) Flat fillet
C) Vertical groove
D) Flat groove
  • 48. 2G:
A) Horizontal groove
B) Horizontal fillet
C) Vertical groove
D) Flat groove
  • 49. 3G:
A) Vertical groove
B) Overhead groove
C) Horizontal fillet
D) Flat groove
  • 50. 4G:
A) Horizontal fillet
B) Vertical groove
C) Flat groove
D) Overhead groove
  • 51. Weave:
A) Slag brushing
B) Cleaning motion
C) Weld bead made with transverse movement
D) Root buildup
  • 52. No large amount of ______ should be in the weld
A) Oxygen
B) Mercury
C) Hydrogen
D) Sulphur
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