12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The weld bead
B) The flux coating
C) The shielding gas makes sparks
D) The metal to be welded
  • 2. What is an arc?
A) Light from welding
B) Flow of electricity through a gaseous space or air gap
C) A joint type that lets light fly around everywhere
D) A type of electrode
  • 3. What is arc length?
A) Length of the rod
B) The distance from the gap between plates and the clamp wire
C) Length of the weld
D) The distance from the electrode to the weld pool
  • 4. What is undercut?
A) A groove melted into base metal left unfilled
B) A grove melted into the base metal that is a misaligned joint
C) Extra filler metal
D) A surface crack
  • 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 center of weld metal
B) Imaginary line through HAZ boundary
C) Imaginary line through top of the bead
D) Imaginary line through weld toe
  • 7. What is spatter?
A) Metal particles expelled that do not form part of the weld
B) Arc blow expelled that do not form part of the weld
C) Gas bubbles 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) The end of the metal piece that is welded first.
D) a welding defect
  • 10. What is a crater crack?
A) A stress fracture formed cause metal was too clean
B) A centerline crack
C) A crack in the crater of a weld bead
D) A cold shut
  • 11. What is ductility
A) Ability to resist rust
B) Ability to deform without failure
C) Ability to remain cold.
D) Ability to stay magnetized
  • 12. What is duty cycle?
A) Machine lifespan over a 10 min period
B) Electrode burn rate is working nonstop
C) Percentage of time welders operate at rated output
D) Arc stability rating
  • 13. What is filler metal?
A) Distance fusion extends into base metal
B) Metal added to make a welded joint
C) Flux coating
D) Metal base plate
  • 14. What is depth of fusion?
A) Weld height
B) Distance fusion extends into base metal
C) Distance bead width extends
D) Rod penetration
  • 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) 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) 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) Portable and inexpensive
B) No slag
C) Fully automated
D) High speed
  • 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) DC only
B) Neither
C) AC or DC
D) AC only
  • 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) Electrode negative
C) Electrode is positive, ground negative
D) No polarity exists
  • 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) MIG wire
B) TIG tungsten
C) Consumable electrode covered with flux
D) Carbon rod
  • 26. Strength of 7018 rod:
A) 40k psi
B) 120k psi
C) 18k psi
D) 70k psi
  • 27. Meaning of 3rd digit in 7018:
A) Positive polarity rod
B) Coating type
C) Welding position
D) Rod length
  • 28. Meaning of 4th digit in 7018:
A) Strength
B) Diameter
C) Arc length
D) Composition of rod
  • 29. Four rod groups:
A) Inert, reactive, passive, active
B) Soft rods, hard rods, hot rods, cold rods
C) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
D) High carbon, low carbon, stainless, alloy
  • 30. DCEP:
A) Direct Coil Energy Pulse
B) Direct Current Elevated Pressure
C) Direct Current Electrode Positive
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) 500°F
B) 175°F
C) 250°F
D) 100°F
  • 33. E stands for:
A) Edge
B) Energy
C) Earth
D) Electrode
  • 34. Rod lengths:
A) 20–30 inches
B) 3–6 inches
C) 1–2 feet
D) 9–18 inches
  • 35. MR or R:
A) Metal rod
B) Moisture resistant
C) Medium rated
D) Machine ready
  • 36. Base metal we use:
A) A36 mild steel
B) Aluminum
C) Stainless steel
D) Cast iron
  • 37. Light produced in welding:
A) Green infrared
B) Blue spectrum only
C) Electro violet and ultra red light
D) X‑ray emissions
  • 38. Five joint types:
A) Lap, butt, edge, corner, T-joint
B) Root, face, toe, leg, web
C) Curve, twist, bend, fold, lock
D) Arc, gas, flux, rod, plate
  • 39. AWS:
A) Arc Welding System
B) Advanced Weld Standards
C) American Welding Society
D) American Wire Service
  • 40. Heat affected zone:
A) Joint line
B) Metal melted completely
C) Slag-covered area
D) Metal altered but not melted
  • 41. PJP:
A) Pressure Joint Process
B) Partial Joint Penetration
C) Primary Joint Preparation
D) Parallel Joint Pass
  • 42. CJP:
A) Controlled Joint Process
B) Complete Joint Penetration
C) Cut Joint Position
D) Central Joint Plane
  • 43. 1F:
A) Overhead fillet
B) Flat groove
C) Flat fillet
D) Vertical fillet
  • 44. 2F
A) Flat Fillet
B) Vertical groove
C) Horizontal groove
D) Horizontal fillet
  • 45. 3F
A) Horizontal groove
B) Overhead fillet
C) Vertical fillet
D) Flat fillet
  • 46. 4F:
A) Vertical fillet
B) Overhead fillet
C) Horizontal fillet
D) Flat groove
  • 47. 1G:
A) Overhead groove
B) Vertical groove
C) Flat groove
D) Flat fillet
  • 48. 2G:
A) Vertical groove
B) Horizontal fillet
C) Horizontal groove
D) Flat groove
  • 49. 3G:
A) Horizontal fillet
B) Flat groove
C) Overhead groove
D) Vertical groove
  • 50. 4G:
A) Vertical groove
B) Horizontal fillet
C) Overhead groove
D) Flat groove
  • 51. Weave:
A) Slag brushing
B) Weld bead made with transverse movement
C) Root buildup
D) Cleaning motion
  • 52. No large amount of ______ should be in the weld
A) Hydrogen
B) Oxygen
C) Mercury
D) Sulphur
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