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) A joint type that lets light fly around everywhere
B) A type of electrode
C) Flow of electricity through a gaseous space or air gap
D) Light from welding
  • 3. What is arc length?
A) Length of the rod
B) The distance from the gap between plates and the clamp wire
C) The distance from the electrode to the weld pool
D) Length of the weld
  • 4. What is undercut?
A) A surface crack
B) Extra filler metal
C) A groove melted into base metal left unfilled
D) A grove melted into the base metal that is a misaligned joint
  • 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 depression 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 HAZ boundary
C) Imaginary line through center of weld metal
D) Imaginary line through weld toe
  • 7. What is spatter?
A) Falling flux expelled that do not form part of the weld
B) Gas bubbles expelled that do not form part of the weld
C) Arc blow 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) Undercut failure
C) Hot cracks trapped in the weld pool at the end
D) Non-metallic material trapped in weld
  • 9. What is a joint?
A) a welding defect
B) The end of the metal piece that is welded first.
C) filler metal
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 cold shut
C) A centerline crack
D) A stress fracture formed cause metal was too clean
  • 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) Electrode burn rate is working nonstop
B) Machine lifespan over a 10 min period
C) Arc stability rating
D) Percentage of time welders operate at rated output
  • 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) Distance bead width extends
B) Rod penetration
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) Amount of slag produced
B) Heat generated
C) Weight of metal deposited per unit time
D) Length welded per hour
  • 17. What does SMAW stand for?
A) Shielded Mechanical Arc Welding
B) Solid Metal Arc Welding
C) Shielded Metal Arc Welding
D) Stick Metal Arc Work
  • 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) Fully automated
C) Portable and inexpensive
D) No slag
  • 20. Disadvantage of SMAW?
A) Cannot weld steel
B) Only works indoors
C) Requires gas bottles
D) It’s slow
  • 21. 7018 can use:
A) AC only
B) Neither
C) DC only
D) AC or DC
  • 22. What polarity do we weld with?
A) Straight polarity
B) Alternating ground
C) Reverse polarity
D) No polarity
  • 23. Reverse polarity:
A) Ground floats
B) Electrode is positive, ground negative
C) No polarity exists
D) Electrode negative
  • 24. Two safety points:
A) Avoid using gloves never safety glasses
B) Use small rods and low heat
C) Always weld outside use sitka gloves
D) Proper ventilation and protective clothing
  • 25. SMAW electrode:
A) Consumable electrode covered with flux
B) MIG wire
C) TIG tungsten
D) Carbon rod
  • 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) Rod length
B) Positive polarity rod
C) Coating type
D) Welding position
  • 28. Meaning of 4th digit in 7018:
A) Arc length
B) Diameter
C) Strength
D) Composition of rod
  • 29. Four rod groups:
A) Inert, reactive, passive, active
B) High carbon, low carbon, stainless, alloy
C) Soft rods, hard rods, hot rods, cold rods
D) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
  • 30. DCEP:
A) Direct Current Electrode Positive
B) Direct Coil Energy Pulse
C) Direct Current Elevated Pressure
D) Dual Current Electrode Phase
  • 31. Why put rods in oven?
A) Reduce moisture
B) heat for penetration
C) sterilize
D) Prevent Bending
  • 32. Minimum oven temperature?
A) 175°F
B) 500°F
C) 250°F
D) 100°F
  • 33. E stands for:
A) Edge
B) Electrode
C) Earth
D) Energy
  • 34. Rod lengths:
A) 3–6 inches
B) 20–30 inches
C) 9–18 inches
D) 1–2 feet
  • 35. MR or R:
A) Machine ready
B) Metal rod
C) Moisture resistant
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) Electro violet and ultra red light
B) Green infrared
C) X‑ray emissions
D) Blue spectrum only
  • 38. Five joint types:
A) Curve, twist, bend, fold, lock
B) Root, face, toe, leg, web
C) Lap, butt, edge, corner, T-joint
D) Arc, gas, flux, rod, plate
  • 39. AWS:
A) Advanced Weld Standards
B) Arc Welding System
C) American Welding Society
D) American Wire Service
  • 40. Heat affected zone:
A) Metal altered but not melted
B) Slag-covered area
C) Metal melted completely
D) Joint line
  • 41. PJP:
A) Pressure Joint Process
B) Partial Joint Penetration
C) Parallel Joint Pass
D) Primary Joint Preparation
  • 42. CJP:
A) Complete Joint Penetration
B) Controlled Joint Process
C) Central Joint Plane
D) Cut Joint Position
  • 43. 1F:
A) Flat groove
B) Overhead fillet
C) Vertical fillet
D) Flat fillet
  • 44. 2F
A) Horizontal fillet
B) Vertical groove
C) Flat Fillet
D) Horizontal groove
  • 45. 3F
A) Vertical fillet
B) Flat fillet
C) Horizontal groove
D) Overhead fillet
  • 46. 4F:
A) Overhead fillet
B) Flat groove
C) Horizontal fillet
D) Vertical fillet
  • 47. 1G:
A) Flat fillet
B) Overhead groove
C) Flat groove
D) Vertical groove
  • 48. 2G:
A) Vertical groove
B) Horizontal fillet
C) Horizontal groove
D) Flat groove
  • 49. 3G:
A) Overhead groove
B) Horizontal fillet
C) Flat groove
D) Vertical groove
  • 50. 4G:
A) Overhead groove
B) Flat groove
C) Horizontal fillet
D) Vertical groove
  • 51. Weave:
A) Root buildup
B) Cleaning motion
C) Slag brushing
D) Weld bead made with transverse movement
  • 52. No large amount of ______ should be in the weld
A) Hydrogen
B) Mercury
C) Oxygen
D) Sulphur
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