12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The metal to be welded
B) The shielding gas makes sparks
C) The weld bead
D) The flux coating
  • 2. What is an arc?
A) Light from welding
B) A type of electrode
C) Flow of electricity through a gaseous space or air gap
D) A joint type that lets light fly around everywhere
  • 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 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 porosity pocket in the face of the weld
B) A depression in the face of the weld
C) A buildup of slag 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 HAZ boundary
B) Imaginary line through top of the bead
C) Imaginary line through center of weld metal
D) Imaginary line through weld toe
  • 7. What is spatter?
A) Arc blow expelled that do not form part of the weld
B) Falling flux expelled that do not form part of the weld
C) Gas bubbles 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) 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) a welding defect
B) Location where two or more members are joined
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 remain cold.
B) Ability to stay magnetized
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) Electrode burn rate is working nonstop
C) Arc stability rating
D) Percentage of time welders operate at rated output
  • 13. What is filler metal?
A) Metal added to make a welded joint
B) Flux coating
C) Metal base plate
D) Distance fusion extends into base metal
  • 14. What is depth of fusion?
A) Rod penetration
B) Distance bead width extends
C) Distance fusion extends into base metal
D) Weld height
  • 15. What is penetration?
A) Slag depth
B) Extent weld metal combines with base metal
C) Arc reach
D) Bead surface depth
  • 16. What is deposition rate?
A) Weight of metal deposited per unit time
B) Heat generated
C) Amount of slag produced
D) Length welded per hour
  • 17. What does SMAW stand for?
A) Stick Metal Arc Work
B) Solid Metal Arc Welding
C) Shielded Metal Arc Welding
D) Shielded Mechanical 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) No slag
B) High speed
C) Portable and inexpensive
D) Fully automated
  • 20. Disadvantage of SMAW?
A) It’s slow
B) Only works indoors
C) Cannot weld steel
D) Requires gas bottles
  • 21. 7018 can use:
A) DC only
B) AC or DC
C) AC only
D) Neither
  • 22. What polarity do we weld with?
A) Alternating ground
B) Reverse polarity
C) No polarity
D) Straight polarity
  • 23. Reverse polarity:
A) No polarity exists
B) Electrode is positive, ground negative
C) Ground floats
D) Electrode negative
  • 24. Two safety points:
A) Proper ventilation and protective clothing
B) Avoid using gloves never safety glasses
C) Always weld outside use sitka gloves
D) Use small rods and low heat
  • 25. SMAW electrode:
A) TIG tungsten
B) Consumable electrode covered with flux
C) Carbon rod
D) MIG wire
  • 26. Strength of 7018 rod:
A) 70k psi
B) 18k psi
C) 40k psi
D) 120k psi
  • 27. Meaning of 3rd digit in 7018:
A) Positive polarity rod
B) Coating type
C) Rod length
D) Welding position
  • 28. Meaning of 4th digit in 7018:
A) Diameter
B) Composition of rod
C) Arc length
D) Strength
  • 29. Four rod groups:
A) Inert, reactive, passive, active
B) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
C) High carbon, low carbon, stainless, alloy
D) Soft rods, hard rods, hot rods, cold rods
  • 30. DCEP:
A) Direct Current Electrode Positive
B) Dual Current Electrode Phase
C) Direct Coil Energy Pulse
D) Direct Current Elevated Pressure
  • 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) Earth
C) Energy
D) Electrode
  • 34. Rod lengths:
A) 1–2 feet
B) 3–6 inches
C) 9–18 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) A36 mild steel
B) Stainless steel
C) Cast iron
D) Aluminum
  • 37. Light produced in welding:
A) Electro violet and ultra red light
B) X‑ray emissions
C) Blue spectrum only
D) Green infrared
  • 38. Five joint types:
A) Curve, twist, bend, fold, lock
B) Lap, butt, edge, corner, T-joint
C) Root, face, toe, leg, web
D) Arc, gas, flux, rod, plate
  • 39. AWS:
A) American Wire Service
B) American Welding Society
C) Arc Welding System
D) Advanced Weld Standards
  • 40. Heat affected zone:
A) Joint line
B) Slag-covered area
C) Metal altered but not melted
D) Metal melted completely
  • 41. PJP:
A) Parallel Joint Pass
B) Pressure Joint Process
C) Primary Joint Preparation
D) Partial Joint Penetration
  • 42. CJP:
A) Controlled Joint Process
B) Cut Joint Position
C) Central Joint Plane
D) Complete Joint Penetration
  • 43. 1F:
A) Vertical fillet
B) Flat fillet
C) Overhead fillet
D) Flat groove
  • 44. 2F
A) Horizontal groove
B) Vertical groove
C) Horizontal fillet
D) Flat Fillet
  • 45. 3F
A) Overhead fillet
B) Vertical fillet
C) Horizontal groove
D) Flat fillet
  • 46. 4F:
A) Vertical fillet
B) Overhead fillet
C) Flat groove
D) Horizontal fillet
  • 47. 1G:
A) Overhead groove
B) Vertical groove
C) Flat fillet
D) Flat groove
  • 48. 2G:
A) Flat groove
B) Horizontal groove
C) Horizontal fillet
D) Vertical groove
  • 49. 3G:
A) Flat groove
B) Horizontal fillet
C) Overhead groove
D) Vertical groove
  • 50. 4G:
A) Overhead groove
B) Flat groove
C) Vertical groove
D) Horizontal fillet
  • 51. Weave:
A) Root buildup
B) Weld bead made with transverse movement
C) Slag brushing
D) Cleaning motion
  • 52. No large amount of ______ should be in the weld
A) Sulphur
B) Oxygen
C) Mercury
D) Hydrogen
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