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) Light from welding
B) A joint type that lets light fly around everywhere
C) A type of electrode
D) Flow of electricity through a gaseous space or air gap
  • 3. What is arc length?
A) Length of the rod
B) The distance from the electrode to the weld pool
C) Length of the weld
D) The distance from the gap between plates and the clamp wire
  • 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) A surface crack
D) Extra filler metal
  • 5. What is a crater?
A) A depression 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 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 top of the bead
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) 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) Steel trapped in slag
B) Non-metallic material trapped in weld
C) Hot cracks trapped in the weld pool at the end
D) Undercut failure
  • 9. What is a joint?
A) The end of the metal piece that is welded first.
B) a welding defect
C) Location where two or more members are joined
D) filler metal
  • 10. What is a crater crack?
A) A stress fracture formed cause metal was too clean
B) A centerline crack
C) A crack in the crater of a weld bead
D) A cold shut
  • 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) Percentage of time welders operate at rated output
B) Electrode burn rate is working nonstop
C) Machine lifespan over a 10 min period
D) Arc stability rating
  • 13. What is filler metal?
A) Metal added to make a welded joint
B) Distance fusion extends into base metal
C) Metal base plate
D) Flux coating
  • 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) Bead surface depth
B) Extent weld metal combines with base metal
C) Slag depth
D) Arc reach
  • 16. What is deposition rate?
A) Length welded per hour
B) Weight of metal deposited per unit time
C) Amount of slag produced
D) Heat generated
  • 17. What does SMAW stand for?
A) Stick Metal Arc Work
B) Shielded Metal Arc Welding
C) Solid Metal Arc Welding
D) Shielded Mechanical Arc Welding
  • 18. What is SMAW?
A) Purely mechanical process
B) Uses shielding gas
C) Uses heat of an arc between covered electrode and the work
D) Uses tungsten electrode
  • 19. Advantage of SMAW?
A) High speed
B) Portable and inexpensive
C) Fully automated
D) No slag
  • 20. Disadvantage of SMAW?
A) Requires gas bottles
B) It’s slow
C) Cannot weld steel
D) Only works indoors
  • 21. 7018 can use:
A) Neither
B) AC or DC
C) DC only
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) No polarity exists
B) Electrode negative
C) Ground floats
D) Electrode is positive, ground negative
  • 24. Two safety points:
A) Use small rods and low heat
B) Avoid using gloves never safety glasses
C) Proper ventilation and protective clothing
D) Always weld outside use sitka gloves
  • 25. SMAW electrode:
A) TIG tungsten
B) Carbon rod
C) Consumable electrode covered with flux
D) MIG wire
  • 26. Strength of 7018 rod:
A) 18k psi
B) 40k psi
C) 120k psi
D) 70k psi
  • 27. Meaning of 3rd digit in 7018:
A) Welding position
B) Coating type
C) Rod length
D) Positive polarity rod
  • 28. Meaning of 4th digit in 7018:
A) Strength
B) Diameter
C) Composition of rod
D) Arc length
  • 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 Coil Energy Pulse
B) Direct Current Electrode Positive
C) Direct Current Elevated Pressure
D) Dual Current Electrode Phase
  • 31. Why put rods in oven?
A) heat for penetration
B) Prevent Bending
C) Reduce moisture
D) sterilize
  • 32. Minimum oven temperature?
A) 175°F
B) 100°F
C) 500°F
D) 250°F
  • 33. E stands for:
A) Electrode
B) Earth
C) Energy
D) Edge
  • 34. Rod lengths:
A) 1–2 feet
B) 9–18 inches
C) 3–6 inches
D) 20–30 inches
  • 35. MR or R:
A) Medium rated
B) Machine ready
C) Metal rod
D) Moisture resistant
  • 36. Base metal we use:
A) Aluminum
B) Cast iron
C) A36 mild steel
D) Stainless steel
  • 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) Root, face, toe, leg, web
B) Lap, butt, edge, corner, T-joint
C) Arc, gas, flux, rod, plate
D) Curve, twist, bend, fold, lock
  • 39. AWS:
A) Advanced Weld Standards
B) American Wire Service
C) American Welding Society
D) Arc Welding System
  • 40. Heat affected zone:
A) Metal altered but not melted
B) Slag-covered area
C) Metal melted completely
D) Joint line
  • 41. PJP:
A) Parallel Joint Pass
B) Primary Joint Preparation
C) Partial Joint Penetration
D) Pressure Joint Process
  • 42. CJP:
A) Cut Joint Position
B) Controlled Joint Process
C) Central Joint Plane
D) Complete Joint Penetration
  • 43. 1F:
A) Vertical fillet
B) Overhead fillet
C) Flat fillet
D) Flat groove
  • 44. 2F
A) Horizontal groove
B) Flat Fillet
C) Horizontal fillet
D) Vertical groove
  • 45. 3F
A) Flat fillet
B) Vertical fillet
C) Overhead fillet
D) Horizontal groove
  • 46. 4F:
A) Vertical fillet
B) Flat groove
C) Horizontal fillet
D) Overhead fillet
  • 47. 1G:
A) Vertical groove
B) Overhead groove
C) Flat groove
D) Flat fillet
  • 48. 2G:
A) Horizontal fillet
B) Flat groove
C) Vertical groove
D) Horizontal groove
  • 49. 3G:
A) Vertical groove
B) Flat groove
C) Horizontal fillet
D) Overhead groove
  • 50. 4G:
A) Horizontal fillet
B) Vertical groove
C) Flat groove
D) Overhead groove
  • 51. Weave:
A) Cleaning motion
B) Root buildup
C) Slag brushing
D) Weld bead made with transverse movement
  • 52. No large amount of ______ should be in the weld
A) Hydrogen
B) Sulphur
C) Oxygen
D) Mercury
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