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) A type of electrode
B) Flow of electricity through a gaseous space or air gap
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 groove melted into base metal left unfilled
B) Extra filler metal
C) A grove melted into the base metal that is a misaligned joint
D) A surface crack
  • 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 top of the bead
B) Imaginary line through weld toe
C) Imaginary line through HAZ boundary
D) Imaginary line through center of weld metal
  • 7. What is spatter?
A) Gas bubbles expelled that do not form part of the weld
B) Metal particles expelled that do not form part of the weld
C) Falling flux 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) Hot cracks trapped in the weld pool at the end
B) Non-metallic material trapped in weld
C) Undercut failure
D) Steel trapped in slag
  • 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 cold shut
B) A centerline crack
C) A stress fracture formed cause metal was too clean
D) A crack in the crater of a weld bead
  • 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) Percentage of time welders operate at rated output
B) Arc stability rating
C) Machine lifespan over a 10 min period
D) Electrode burn rate is working nonstop
  • 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 fusion extends into base metal
B) Distance bead width extends
C) Rod penetration
D) Weld height
  • 15. What is penetration?
A) Bead surface depth
B) Extent weld metal combines with base metal
C) Arc reach
D) Slag depth
  • 16. What is deposition rate?
A) Weight of metal deposited per unit time
B) Amount of slag produced
C) Heat generated
D) Length welded per hour
  • 17. What does SMAW stand for?
A) Stick Metal Arc Work
B) Shielded Mechanical Arc Welding
C) Solid Metal Arc Welding
D) Shielded Metal Arc Welding
  • 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) Fully automated
B) High speed
C) Portable and inexpensive
D) No slag
  • 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) Neither
B) AC only
C) AC or DC
D) DC only
  • 22. What polarity do we weld with?
A) Alternating ground
B) Reverse polarity
C) Straight polarity
D) No polarity
  • 23. Reverse polarity:
A) Ground floats
B) Electrode negative
C) No polarity exists
D) Electrode is positive, ground negative
  • 24. Two safety points:
A) Use small rods and low heat
B) Proper ventilation and protective clothing
C) Avoid using gloves never safety glasses
D) Always weld outside use sitka gloves
  • 25. SMAW electrode:
A) Carbon rod
B) TIG tungsten
C) Consumable electrode covered with flux
D) MIG wire
  • 26. Strength of 7018 rod:
A) 18k psi
B) 40k psi
C) 70k psi
D) 120k psi
  • 27. Meaning of 3rd digit in 7018:
A) Coating type
B) Rod length
C) Welding position
D) Positive polarity rod
  • 28. Meaning of 4th digit in 7018:
A) Diameter
B) Arc length
C) Composition of rod
D) Strength
  • 29. Four rod groups:
A) High carbon, low carbon, stainless, alloy
B) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
C) Inert, reactive, passive, active
D) Soft rods, hard rods, hot rods, cold rods
  • 30. DCEP:
A) Direct Current Electrode Positive
B) Direct Current Elevated Pressure
C) Direct Coil Energy Pulse
D) Dual Current Electrode Phase
  • 31. Why put rods in oven?
A) Reduce moisture
B) Prevent Bending
C) heat for penetration
D) sterilize
  • 32. Minimum oven temperature?
A) 250°F
B) 500°F
C) 175°F
D) 100°F
  • 33. E stands for:
A) Energy
B) Earth
C) Electrode
D) Edge
  • 34. Rod lengths:
A) 3–6 inches
B) 1–2 feet
C) 9–18 inches
D) 20–30 inches
  • 35. MR or R:
A) Metal rod
B) Medium rated
C) Machine ready
D) Moisture resistant
  • 36. Base metal we use:
A) Cast iron
B) Aluminum
C) Stainless steel
D) A36 mild steel
  • 37. Light produced in welding:
A) Green infrared
B) Electro violet and ultra red light
C) Blue spectrum only
D) X‑ray emissions
  • 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) American Wire Service
B) American Welding Society
C) Advanced Weld Standards
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) Partial Joint Penetration
B) Primary Joint Preparation
C) Parallel Joint Pass
D) Pressure Joint Process
  • 42. CJP:
A) Complete Joint Penetration
B) Central Joint Plane
C) Cut Joint Position
D) Controlled Joint Process
  • 43. 1F:
A) Vertical fillet
B) Flat groove
C) Flat fillet
D) Overhead fillet
  • 44. 2F
A) Horizontal fillet
B) Vertical groove
C) Flat Fillet
D) Horizontal groove
  • 45. 3F
A) Flat fillet
B) Overhead fillet
C) Horizontal groove
D) Vertical fillet
  • 46. 4F:
A) Horizontal fillet
B) Flat groove
C) Overhead fillet
D) Vertical fillet
  • 47. 1G:
A) Vertical groove
B) Overhead groove
C) Flat groove
D) Flat fillet
  • 48. 2G:
A) Flat groove
B) Horizontal fillet
C) Vertical groove
D) Horizontal groove
  • 49. 3G:
A) Horizontal fillet
B) Vertical groove
C) Flat groove
D) Overhead groove
  • 50. 4G:
A) Vertical groove
B) Horizontal fillet
C) Overhead groove
D) Flat groove
  • 51. Weave:
A) Weld bead made with transverse movement
B) Root buildup
C) Slag brushing
D) Cleaning motion
  • 52. No large amount of ______ should be in the weld
A) Mercury
B) Sulphur
C) Hydrogen
D) Oxygen
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