12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The weld bead
B) The flux coating
C) The metal to be welded
D) The shielding gas makes sparks
  • 2. What is an arc?
A) A joint type that lets light fly around everywhere
B) A type of electrode
C) Light from welding
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) Length of the rod
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 surface crack
C) Extra filler metal
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 buildup of slag in the face of the weld
D) A depression in the face of the weld
  • 6. What is the axis of weld?
A) Imaginary line through HAZ boundary
B) Imaginary line through weld toe
C) Imaginary line through top of the bead
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) Falling flux expelled that do not form part of the weld
C) Arc blow expelled that do not form part of the weld
D) Gas bubbles expelled that do not form part of the weld
  • 8. What is slag inclusion?
A) Steel trapped in slag
B) Non-metallic material trapped in weld
C) Hot cracks trapped in the weld pool at the end
D) Undercut failure
  • 9. What is a joint?
A) The end of the metal piece that is welded first.
B) filler metal
C) a welding defect
D) Location where two or more members are joined
  • 10. What is a crater crack?
A) A stress fracture formed cause metal was too clean
B) A centerline crack
C) A cold shut
D) A crack in the crater of a weld bead
  • 11. What is ductility
A) Ability to deform without failure
B) Ability to stay magnetized
C) Ability to resist rust
D) Ability to remain cold.
  • 12. What is duty cycle?
A) Arc stability rating
B) Percentage of time welders operate at rated output
C) Machine lifespan over a 10 min period
D) Electrode burn rate is working nonstop
  • 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) Bead surface depth
C) Extent weld metal combines with base metal
D) Arc reach
  • 16. What is deposition rate?
A) Amount of slag produced
B) Length welded per hour
C) Heat generated
D) Weight of metal deposited per unit time
  • 17. What does SMAW stand for?
A) Shielded Mechanical Arc Welding
B) Stick Metal Arc Work
C) Shielded Metal Arc Welding
D) Solid Metal Arc Welding
  • 18. What is SMAW?
A) Uses heat of an arc between covered electrode and the work
B) Uses tungsten electrode
C) Purely mechanical process
D) Uses shielding gas
  • 19. Advantage of SMAW?
A) No slag
B) Portable and inexpensive
C) Fully automated
D) High speed
  • 20. Disadvantage of SMAW?
A) Only works indoors
B) Cannot weld steel
C) It’s slow
D) Requires gas bottles
  • 21. 7018 can use:
A) AC or DC
B) DC only
C) AC only
D) Neither
  • 22. What polarity do we weld with?
A) No polarity
B) Alternating ground
C) Straight polarity
D) Reverse polarity
  • 23. Reverse polarity:
A) Electrode is positive, ground negative
B) Ground floats
C) Electrode negative
D) No polarity exists
  • 24. Two safety points:
A) Use small rods and low heat
B) Proper ventilation and protective clothing
C) Always weld outside use sitka gloves
D) Avoid using gloves never safety glasses
  • 25. SMAW electrode:
A) Consumable electrode covered with flux
B) MIG wire
C) Carbon rod
D) TIG tungsten
  • 26. Strength of 7018 rod:
A) 18k psi
B) 120k psi
C) 40k psi
D) 70k psi
  • 27. Meaning of 3rd digit in 7018:
A) Rod length
B) Welding position
C) Coating type
D) Positive polarity rod
  • 28. Meaning of 4th digit in 7018:
A) Composition of rod
B) Diameter
C) Arc length
D) Strength
  • 29. Four rod groups:
A) High carbon, low carbon, stainless, alloy
B) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
C) Inert, reactive, passive, active
D) Soft rods, hard rods, hot rods, cold rods
  • 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) Prevent Bending
B) Reduce moisture
C) heat for penetration
D) sterilize
  • 32. Minimum oven temperature?
A) 250°F
B) 100°F
C) 500°F
D) 175°F
  • 33. E stands for:
A) Earth
B) Edge
C) Energy
D) Electrode
  • 34. Rod lengths:
A) 20–30 inches
B) 1–2 feet
C) 9–18 inches
D) 3–6 inches
  • 35. MR or R:
A) Moisture resistant
B) Medium rated
C) Metal rod
D) Machine ready
  • 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) Blue spectrum only
C) Green infrared
D) Electro violet and ultra red light
  • 38. Five joint types:
A) Root, face, toe, leg, web
B) Arc, gas, flux, rod, plate
C) Lap, butt, edge, corner, T-joint
D) Curve, twist, bend, fold, lock
  • 39. AWS:
A) American Wire Service
B) Advanced Weld Standards
C) American Welding Society
D) Arc Welding System
  • 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) Controlled Joint Process
B) Cut Joint Position
C) Central Joint Plane
D) Complete Joint Penetration
  • 43. 1F:
A) Vertical fillet
B) Flat fillet
C) Overhead fillet
D) Flat groove
  • 44. 2F
A) Horizontal fillet
B) Flat Fillet
C) Vertical groove
D) Horizontal groove
  • 45. 3F
A) Overhead fillet
B) Horizontal groove
C) Flat fillet
D) Vertical fillet
  • 46. 4F:
A) Overhead fillet
B) Flat groove
C) Horizontal fillet
D) Vertical fillet
  • 47. 1G:
A) Flat groove
B) Overhead groove
C) Flat fillet
D) Vertical groove
  • 48. 2G:
A) Horizontal fillet
B) Horizontal groove
C) Flat groove
D) Vertical groove
  • 49. 3G:
A) Flat groove
B) Overhead groove
C) Vertical groove
D) Horizontal fillet
  • 50. 4G:
A) Horizontal fillet
B) Vertical groove
C) Flat groove
D) Overhead groove
  • 51. Weave:
A) Cleaning motion
B) Weld bead made with transverse movement
C) Slag brushing
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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