12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The shielding gas makes sparks
B) The flux coating
C) The metal to be welded
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) Light from welding
D) A type of electrode
  • 3. What is arc length?
A) The distance from the electrode to the weld pool
B) The distance from the gap between plates and the clamp wire
C) Length of the weld
D) Length of the rod
  • 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 HAZ boundary
B) Imaginary line through center of weld metal
C) Imaginary line through weld toe
D) Imaginary line through top of the bead
  • 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) Steel trapped in slag
B) Hot cracks trapped in the weld pool at the end
C) Non-metallic material trapped in weld
D) Undercut failure
  • 9. What is a joint?
A) a welding defect
B) The end of the metal piece that is welded first.
C) Location where two or more members are joined
D) filler metal
  • 10. What is a crater crack?
A) A centerline crack
B) A crack in the crater of a weld bead
C) A cold shut
D) A stress fracture formed cause metal was too clean
  • 11. What is ductility
A) Ability to remain cold.
B) Ability to deform without failure
C) Ability to stay magnetized
D) Ability to resist rust
  • 12. What is duty cycle?
A) Machine lifespan over a 10 min period
B) Percentage of time welders operate at rated output
C) Electrode burn rate is working nonstop
D) Arc stability rating
  • 13. What is filler metal?
A) Metal base plate
B) Flux coating
C) Metal added to make a welded joint
D) Distance fusion extends into base metal
  • 14. What is depth of fusion?
A) Rod penetration
B) Distance bead width extends
C) Weld height
D) Distance fusion extends into base metal
  • 15. What is penetration?
A) Arc reach
B) Slag depth
C) Bead surface depth
D) Extent weld metal combines with base metal
  • 16. What is deposition rate?
A) Weight of metal deposited per unit time
B) Length welded per hour
C) Amount of slag produced
D) Heat generated
  • 17. What does SMAW stand for?
A) Solid Metal Arc Welding
B) Shielded Mechanical Arc Welding
C) Shielded Metal Arc Welding
D) Stick Metal Arc Work
  • 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) Fully automated
D) Portable and inexpensive
  • 20. Disadvantage of SMAW?
A) It’s slow
B) Cannot weld steel
C) Only works indoors
D) Requires gas bottles
  • 21. 7018 can use:
A) Neither
B) DC only
C) AC only
D) AC or DC
  • 22. What polarity do we weld with?
A) No polarity
B) Straight polarity
C) Alternating ground
D) Reverse polarity
  • 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) Proper ventilation and protective clothing
C) Always weld outside use sitka gloves
D) Use small rods and low heat
  • 25. SMAW electrode:
A) Carbon rod
B) Consumable electrode covered with flux
C) TIG tungsten
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) Positive polarity rod
B) Welding position
C) Rod length
D) Coating type
  • 28. Meaning of 4th digit in 7018:
A) Strength
B) Arc length
C) Diameter
D) Composition of rod
  • 29. Four rod groups:
A) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
B) Inert, reactive, passive, active
C) Soft rods, hard rods, hot rods, cold rods
D) High carbon, low carbon, stainless, alloy
  • 30. DCEP:
A) Dual Current Electrode Phase
B) Direct Coil Energy Pulse
C) Direct Current Electrode Positive
D) Direct Current Elevated Pressure
  • 31. Why put rods in oven?
A) sterilize
B) heat for penetration
C) Prevent Bending
D) Reduce moisture
  • 32. Minimum oven temperature?
A) 175°F
B) 250°F
C) 500°F
D) 100°F
  • 33. E stands for:
A) Earth
B) Electrode
C) Edge
D) Energy
  • 34. Rod lengths:
A) 20–30 inches
B) 9–18 inches
C) 3–6 inches
D) 1–2 feet
  • 35. MR or R:
A) Moisture resistant
B) Metal rod
C) Machine ready
D) Medium rated
  • 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) Root, face, toe, leg, web
B) Curve, twist, bend, fold, lock
C) Lap, butt, edge, corner, T-joint
D) Arc, gas, flux, rod, plate
  • 39. AWS:
A) American Wire Service
B) Arc Welding System
C) American Welding Society
D) Advanced Weld Standards
  • 40. Heat affected zone:
A) Joint line
B) Metal altered but not melted
C) Slag-covered area
D) Metal melted completely
  • 41. PJP:
A) Parallel Joint Pass
B) Partial Joint Penetration
C) Pressure Joint Process
D) Primary Joint Preparation
  • 42. CJP:
A) Controlled Joint Process
B) Cut Joint Position
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) Horizontal groove
B) Vertical fillet
C) Flat fillet
D) Overhead fillet
  • 46. 4F:
A) Vertical fillet
B) Overhead fillet
C) Flat groove
D) Horizontal fillet
  • 47. 1G:
A) Flat fillet
B) Flat groove
C) Vertical groove
D) Overhead groove
  • 48. 2G:
A) Vertical groove
B) Horizontal fillet
C) Flat groove
D) Horizontal groove
  • 49. 3G:
A) Vertical groove
B) Flat groove
C) Overhead groove
D) Horizontal fillet
  • 50. 4G:
A) Vertical groove
B) Overhead groove
C) Horizontal fillet
D) Flat groove
  • 51. Weave:
A) Cleaning motion
B) Slag brushing
C) Weld bead made with transverse movement
D) Root buildup
  • 52. No large amount of ______ should be in the weld
A) Sulphur
B) Hydrogen
C) Mercury
D) Oxygen
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