12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The shielding gas makes sparks
B) The metal to be welded
C) The flux coating
D) The weld bead
  • 2. What is an arc?
A) Light from welding
B) A type of electrode
C) A joint type that lets light fly around everywhere
D) Flow of electricity through a gaseous space or air gap
  • 3. What is arc length?
A) Length of the weld
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 rod
  • 4. What is undercut?
A) Extra filler metal
B) A surface crack
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 porosity pocket in the face of the weld
B) A buildup of slag in the face of the weld
C) A depression 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 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) Falling flux expelled that do not form part of the weld
B) Metal particles expelled that do not form part of the weld
C) Gas bubbles 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) Steel trapped in slag
C) Non-metallic material trapped in weld
D) Undercut failure
  • 9. What is a joint?
A) Location where two or more members are joined
B) The end of the metal piece that is welded first.
C) a welding defect
D) filler metal
  • 10. What is a crater crack?
A) A cold shut
B) A centerline crack
C) A crack in the crater of a weld bead
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) Arc stability rating
C) Percentage of time welders operate at rated output
D) Electrode burn rate is working nonstop
  • 13. What is filler metal?
A) Distance fusion extends into base metal
B) Flux coating
C) Metal base plate
D) Metal added to make a welded joint
  • 14. What is depth of fusion?
A) Distance fusion extends into base metal
B) Rod penetration
C) Weld height
D) Distance bead width extends
  • 15. What is penetration?
A) Bead surface depth
B) Arc reach
C) Slag depth
D) Extent weld metal combines with base metal
  • 16. What is deposition rate?
A) Amount of slag produced
B) Length welded per hour
C) Weight of metal deposited per unit time
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) Purely mechanical process
B) Uses tungsten electrode
C) Uses heat of an arc between covered electrode and the work
D) Uses shielding gas
  • 19. Advantage of SMAW?
A) Fully automated
B) No slag
C) High speed
D) Portable and inexpensive
  • 20. Disadvantage of SMAW?
A) Only works indoors
B) Requires gas bottles
C) Cannot weld steel
D) It’s slow
  • 21. 7018 can use:
A) Neither
B) DC only
C) AC only
D) AC or DC
  • 22. What polarity do we weld with?
A) Straight polarity
B) Reverse polarity
C) No polarity
D) Alternating ground
  • 23. Reverse polarity:
A) Electrode is positive, ground negative
B) Ground floats
C) Electrode negative
D) No polarity exists
  • 24. Two safety points:
A) Avoid using gloves never safety glasses
B) Always weld outside use sitka gloves
C) Use small rods and low heat
D) Proper ventilation and protective clothing
  • 25. SMAW electrode:
A) MIG wire
B) Carbon rod
C) TIG tungsten
D) Consumable electrode covered with flux
  • 26. Strength of 7018 rod:
A) 70k psi
B) 18k psi
C) 120k psi
D) 40k 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) Arc length
B) Strength
C) Diameter
D) Composition of rod
  • 29. Four rod groups:
A) Soft rods, hard rods, hot rods, cold rods
B) High carbon, low carbon, stainless, alloy
C) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
D) Inert, reactive, passive, active
  • 30. DCEP:
A) Direct Coil Energy Pulse
B) Direct Current Electrode Positive
C) Dual Current Electrode Phase
D) Direct Current Elevated Pressure
  • 31. Why put rods in oven?
A) Prevent Bending
B) heat for penetration
C) Reduce moisture
D) sterilize
  • 32. Minimum oven temperature?
A) 100°F
B) 250°F
C) 175°F
D) 500°F
  • 33. E stands for:
A) Electrode
B) Earth
C) Edge
D) Energy
  • 34. Rod lengths:
A) 20–30 inches
B) 3–6 inches
C) 1–2 feet
D) 9–18 inches
  • 35. MR or R:
A) Machine ready
B) Metal rod
C) Medium rated
D) Moisture resistant
  • 36. Base metal we use:
A) Stainless steel
B) A36 mild 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) Arc, gas, flux, rod, plate
C) Lap, butt, edge, corner, T-joint
D) Root, face, toe, leg, web
  • 39. AWS:
A) Advanced Weld Standards
B) American Wire Service
C) Arc Welding System
D) American Welding Society
  • 40. Heat affected zone:
A) Metal altered but not melted
B) Joint line
C) Metal melted completely
D) Slag-covered area
  • 41. PJP:
A) Parallel Joint Pass
B) Primary Joint Preparation
C) Pressure Joint Process
D) Partial Joint Penetration
  • 42. CJP:
A) Central Joint Plane
B) Controlled Joint Process
C) Cut Joint Position
D) Complete Joint Penetration
  • 43. 1F:
A) Vertical fillet
B) Flat groove
C) Flat fillet
D) Overhead fillet
  • 44. 2F
A) Horizontal fillet
B) Vertical groove
C) Horizontal groove
D) Flat Fillet
  • 45. 3F
A) Horizontal groove
B) Flat fillet
C) Overhead fillet
D) Vertical fillet
  • 46. 4F:
A) Horizontal fillet
B) Overhead fillet
C) Flat groove
D) Vertical fillet
  • 47. 1G:
A) Overhead groove
B) Flat groove
C) Vertical groove
D) Flat fillet
  • 48. 2G:
A) Flat groove
B) Horizontal groove
C) Vertical groove
D) Horizontal fillet
  • 49. 3G:
A) Vertical groove
B) Overhead groove
C) Horizontal fillet
D) Flat groove
  • 50. 4G:
A) Horizontal fillet
B) Overhead groove
C) Vertical groove
D) Flat 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) Sulphur
B) Oxygen
C) Mercury
D) Hydrogen
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