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12-11-25 Welding Midterm Review 2025
Contribuido por: Sandifer
  • 1. What is the base metal?
A) The shielding gas makes sparks
B) The flux coating
C) The weld bead
D) The metal to be welded
  • 2. What is an arc?
A) A type of electrode
B) Light from welding
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) Length of the weld
B) The distance from the gap between plates and the clamp wire
C) Length of the rod
D) The distance from the electrode to the weld pool
  • 4. What is undercut?
A) Extra filler metal
B) A grove melted into the base metal that is a misaligned joint
C) A groove melted into base metal left unfilled
D) A surface crack
  • 5. What is a crater?
A) A melted rod tip in the face of the weld
B) A depression 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 top of the bead
C) Imaginary line through weld toe
D) Imaginary line through center of weld metal
  • 7. What is spatter?
A) Metal particles 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) Falling flux 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) Undercut failure
C) Steel trapped in slag
D) Non-metallic material trapped in weld
  • 9. What is a joint?
A) filler metal
B) Location where two or more members are joined
C) a welding defect
D) The end of the metal piece that is welded first.
  • 10. What is a crater crack?
A) A crack in the crater of a weld bead
B) A stress fracture formed cause metal was too clean
C) A centerline crack
D) A cold shut
  • 11. What is ductility
A) Ability to deform without failure
B) Ability to resist rust
C) Ability to stay magnetized
D) Ability to remain cold.
  • 12. What is duty cycle?
A) Percentage of time welders operate at rated output
B) Machine lifespan over a 10 min period
C) Arc stability rating
D) Electrode burn rate is working nonstop
  • 13. What is filler metal?
A) Flux coating
B) Metal added to make a welded joint
C) Distance fusion extends into base metal
D) Metal base plate
  • 14. What is depth of fusion?
A) Distance bead width extends
B) Weld height
C) Rod penetration
D) Distance fusion extends into base metal
  • 15. What is penetration?
A) Extent weld metal combines with base metal
B) Bead surface depth
C) Arc reach
D) Slag depth
  • 16. What is deposition rate?
A) Weight of metal deposited per unit time
B) Heat generated
C) Length welded per hour
D) Amount of slag produced
  • 17. What does SMAW stand for?
A) Solid Metal Arc Welding
B) Shielded Metal Arc Welding
C) Shielded Mechanical Arc Welding
D) Stick Metal Arc Work
  • 18. What is SMAW?
A) Uses shielding gas
B) Uses tungsten electrode
C) Purely mechanical process
D) Uses heat of an arc between covered electrode and the work
  • 19. Advantage of SMAW?
A) Portable and inexpensive
B) No slag
C) Fully automated
D) High speed
  • 20. Disadvantage of SMAW?
A) It’s slow
B) Requires gas bottles
C) Only works indoors
D) Cannot weld steel
  • 21. 7018 can use:
A) AC only
B) AC or DC
C) DC only
D) Neither
  • 22. What polarity do we weld with?
A) Reverse polarity
B) Alternating ground
C) Straight polarity
D) No polarity
  • 23. Reverse polarity:
A) Ground floats
B) Electrode is positive, ground negative
C) Electrode negative
D) No polarity exists
  • 24. Two safety points:
A) Proper ventilation and protective clothing
B) Always weld outside use sitka gloves
C) Use small rods and low heat
D) Avoid using gloves never safety glasses
  • 25. SMAW electrode:
A) Carbon rod
B) MIG wire
C) TIG tungsten
D) Consumable electrode covered with flux
  • 26. Strength of 7018 rod:
A) 18k psi
B) 70k 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) Strength
B) Arc length
C) Composition of rod
D) Diameter
  • 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) Direct Coil Energy Pulse
B) Direct Current Elevated Pressure
C) Dual Current Electrode Phase
D) Direct Current Electrode Positive
  • 31. Why put rods in oven?
A) Prevent Bending
B) sterilize
C) Reduce moisture
D) heat for penetration
  • 32. Minimum oven temperature?
A) 500°F
B) 100°F
C) 250°F
D) 175°F
  • 33. E stands for:
A) Energy
B) Edge
C) Earth
D) Electrode
  • 34. Rod lengths:
A) 9–18 inches
B) 20–30 inches
C) 3–6 inches
D) 1–2 feet
  • 35. MR or R:
A) Metal rod
B) Machine ready
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) X‑ray emissions
B) Electro violet and ultra red light
C) Green infrared
D) Blue spectrum only
  • 38. Five joint types:
A) Root, face, toe, leg, web
B) Lap, butt, edge, corner, T-joint
C) Curve, twist, bend, fold, lock
D) Arc, gas, flux, rod, plate
  • 39. AWS:
A) American Welding Society
B) Arc Welding System
C) Advanced Weld Standards
D) American Wire Service
  • 40. Heat affected zone:
A) Slag-covered area
B) Joint line
C) Metal altered but not melted
D) Metal melted completely
  • 41. PJP:
A) Partial Joint Penetration
B) Parallel Joint Pass
C) Primary Joint Preparation
D) Pressure Joint Process
  • 42. CJP:
A) Central Joint Plane
B) Controlled Joint Process
C) Complete Joint Penetration
D) Cut Joint Position
  • 43. 1F:
A) Overhead fillet
B) Flat fillet
C) Flat groove
D) Vertical fillet
  • 44. 2F
A) Vertical groove
B) Flat Fillet
C) Horizontal fillet
D) Horizontal groove
  • 45. 3F
A) Vertical fillet
B) Horizontal groove
C) Flat fillet
D) Overhead fillet
  • 46. 4F:
A) Flat groove
B) Horizontal fillet
C) Vertical fillet
D) Overhead fillet
  • 47. 1G:
A) Flat fillet
B) Overhead groove
C) Flat groove
D) Vertical groove
  • 48. 2G:
A) Vertical groove
B) Flat groove
C) Horizontal groove
D) Horizontal fillet
  • 49. 3G:
A) Horizontal fillet
B) Vertical groove
C) Flat groove
D) Overhead groove
  • 50. 4G:
A) Flat groove
B) Vertical groove
C) Overhead groove
D) Horizontal fillet
  • 51. Weave:
A) Weld bead made with transverse movement
B) Slag brushing
C) Cleaning motion
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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