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12-11-25 Welding Midterm Review 2025
Συνεισφορά από: Sandifer
  • 1. What is the base metal?
A) The metal to be welded
B) The shielding gas makes sparks
C) The flux coating
D) The weld bead
  • 2. What is an arc?
A) Flow of electricity through a gaseous space or air gap
B) Light from welding
C) A type of electrode
D) A joint type that lets light fly around everywhere
  • 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 porosity pocket in the face of the weld
B) A melted rod tip 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 weld toe
B) Imaginary line through top of the bead
C) Imaginary line through center of weld metal
D) Imaginary line through HAZ boundary
  • 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) Non-metallic material trapped in weld
B) Steel trapped in slag
C) Undercut failure
D) Hot cracks trapped in the weld pool at the end
  • 9. What is a joint?
A) a welding defect
B) filler metal
C) The end of the metal piece that is welded first.
D) Location where two or more members are joined
  • 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 stay magnetized
B) Ability to resist rust
C) Ability to remain cold.
D) Ability to deform without failure
  • 12. What is duty cycle?
A) Arc stability rating
B) Machine lifespan over a 10 min period
C) Percentage of time welders operate at rated output
D) Electrode burn rate is working nonstop
  • 13. What is filler metal?
A) Flux coating
B) Distance fusion extends into base metal
C) Metal added to make a welded joint
D) Metal base plate
  • 14. What is depth of fusion?
A) Rod penetration
B) Distance fusion extends into base metal
C) Weld height
D) Distance bead width extends
  • 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) Heat generated
B) Weight of metal deposited per unit time
C) Amount of slag produced
D) Length welded per hour
  • 17. What does SMAW stand for?
A) Stick Metal Arc Work
B) Solid Metal Arc Welding
C) Shielded Mechanical Arc Welding
D) Shielded Metal Arc Welding
  • 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) No slag
B) Fully automated
C) Portable and inexpensive
D) High speed
  • 20. Disadvantage of SMAW?
A) Requires gas bottles
B) It’s slow
C) Only works indoors
D) Cannot weld steel
  • 21. 7018 can use:
A) AC or DC
B) AC only
C) DC only
D) Neither
  • 22. What polarity do we weld with?
A) No polarity
B) Straight polarity
C) Alternating ground
D) Reverse polarity
  • 23. Reverse polarity:
A) No polarity exists
B) Electrode is positive, ground negative
C) Ground floats
D) Electrode negative
  • 24. Two safety points:
A) Always weld outside use sitka gloves
B) Avoid using gloves never safety glasses
C) Use small rods and low heat
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) 70k psi
C) 120k psi
D) 18k psi
  • 27. Meaning of 3rd digit in 7018:
A) Positive polarity rod
B) Welding position
C) Coating type
D) Rod length
  • 28. Meaning of 4th digit in 7018:
A) Composition of rod
B) Strength
C) Diameter
D) Arc length
  • 29. Four rod groups:
A) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
B) Soft rods, hard rods, hot rods, cold rods
C) High carbon, low carbon, stainless, alloy
D) Inert, reactive, passive, active
  • 30. DCEP:
A) Direct Coil Energy Pulse
B) Direct Current Electrode Positive
C) Direct Current Elevated Pressure
D) Dual Current Electrode Phase
  • 31. Why put rods in oven?
A) Prevent Bending
B) Reduce moisture
C) sterilize
D) heat for penetration
  • 32. Minimum oven temperature?
A) 100°F
B) 500°F
C) 175°F
D) 250°F
  • 33. E stands for:
A) Earth
B) Electrode
C) Edge
D) Energy
  • 34. Rod lengths:
A) 3–6 inches
B) 1–2 feet
C) 9–18 inches
D) 20–30 inches
  • 35. MR or R:
A) Medium rated
B) Metal rod
C) Machine ready
D) Moisture resistant
  • 36. Base metal we use:
A) A36 mild steel
B) Stainless steel
C) Aluminum
D) Cast iron
  • 37. Light produced in welding:
A) Green infrared
B) Blue spectrum only
C) X‑ray emissions
D) Electro violet and ultra red light
  • 38. Five joint types:
A) Arc, gas, flux, rod, plate
B) Lap, butt, edge, corner, T-joint
C) Root, face, toe, leg, web
D) Curve, twist, bend, fold, lock
  • 39. AWS:
A) American Wire Service
B) Arc Welding System
C) Advanced Weld Standards
D) American Welding Society
  • 40. Heat affected zone:
A) Slag-covered area
B) Metal altered but not melted
C) Joint line
D) Metal melted completely
  • 41. PJP:
A) Partial Joint Penetration
B) Primary Joint Preparation
C) Pressure Joint Process
D) Parallel Joint Pass
  • 42. CJP:
A) Central Joint Plane
B) Controlled Joint Process
C) Cut Joint Position
D) Complete Joint Penetration
  • 43. 1F:
A) Flat fillet
B) Overhead fillet
C) Flat groove
D) Vertical fillet
  • 44. 2F
A) Flat Fillet
B) Horizontal groove
C) Horizontal fillet
D) Vertical groove
  • 45. 3F
A) Overhead fillet
B) Vertical fillet
C) Flat fillet
D) Horizontal groove
  • 46. 4F:
A) Horizontal fillet
B) Flat groove
C) Overhead fillet
D) Vertical fillet
  • 47. 1G:
A) Overhead groove
B) Flat fillet
C) Flat groove
D) Vertical groove
  • 48. 2G:
A) Horizontal groove
B) Horizontal fillet
C) Flat groove
D) Vertical groove
  • 49. 3G:
A) Horizontal fillet
B) Overhead groove
C) Vertical groove
D) Flat groove
  • 50. 4G:
A) Vertical groove
B) Horizontal fillet
C) Overhead groove
D) Flat groove
  • 51. Weave:
A) Slag brushing
B) Root buildup
C) Weld bead made with transverse movement
D) Cleaning motion
  • 52. No large amount of ______ should be in the weld
A) Hydrogen
B) Sulphur
C) Mercury
D) Oxygen
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