12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The metal to be welded
B) The flux coating
C) The weld bead
D) The shielding gas makes sparks
  • 2. What is an arc?
A) Light from welding
B) A joint type that lets light fly around everywhere
C) Flow of electricity through a gaseous space or air gap
D) A type of electrode
  • 3. What is arc length?
A) The distance from the electrode to the weld pool
B) Length of the rod
C) Length of the weld
D) The distance from the gap between plates and the clamp wire
  • 4. What is undercut?
A) A surface crack
B) A groove melted into base metal left unfilled
C) Extra filler metal
D) A grove melted into the base metal that is a misaligned joint
  • 5. What is a crater?
A) A depression in the face of the weld
B) A melted rod tip 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 weld toe
C) Imaginary line through top of the bead
D) Imaginary line through center of weld metal
  • 7. What is spatter?
A) Gas bubbles expelled that do not form part of the weld
B) Metal particles expelled that do not form part of the weld
C) Falling flux 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) Undercut failure
B) Non-metallic material trapped in weld
C) Steel trapped in slag
D) Hot cracks trapped in the weld pool at the end
  • 9. What is a joint?
A) Location where two or more members are joined
B) a welding defect
C) filler metal
D) The end of the metal piece that is welded first.
  • 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 deform without failure
B) Ability to stay magnetized
C) Ability to resist rust
D) Ability to remain cold.
  • 12. What is duty cycle?
A) Percentage of time welders operate at rated output
B) Arc stability rating
C) Electrode burn rate is working nonstop
D) Machine lifespan over a 10 min period
  • 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) Rod penetration
B) Distance bead width extends
C) Weld height
D) Distance fusion extends into base metal
  • 15. What is penetration?
A) Extent weld metal combines with base metal
B) Bead surface depth
C) Slag depth
D) Arc reach
  • 16. What is deposition rate?
A) Weight of metal deposited per unit time
B) Length welded per hour
C) Amount of slag produced
D) Heat generated
  • 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) 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) High speed
B) Fully automated
C) Portable and inexpensive
D) No slag
  • 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 or DC
B) DC only
C) Neither
D) AC only
  • 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) No polarity exists
C) Electrode negative
D) Electrode is positive, ground negative
  • 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) TIG tungsten
B) Consumable electrode covered with flux
C) MIG wire
D) Carbon rod
  • 26. Strength of 7018 rod:
A) 18k psi
B) 40k psi
C) 120k psi
D) 70k psi
  • 27. Meaning of 3rd digit in 7018:
A) Rod length
B) Positive polarity rod
C) Coating type
D) Welding position
  • 28. Meaning of 4th digit in 7018:
A) Arc length
B) Composition of rod
C) Strength
D) Diameter
  • 29. Four rod groups:
A) High carbon, low carbon, stainless, alloy
B) Inert, reactive, passive, active
C) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
D) Soft rods, hard rods, hot rods, cold rods
  • 30. DCEP:
A) Dual Current Electrode Phase
B) Direct Current Elevated Pressure
C) Direct Current Electrode Positive
D) Direct Coil Energy Pulse
  • 31. Why put rods in oven?
A) heat for penetration
B) Prevent Bending
C) Reduce moisture
D) sterilize
  • 32. Minimum oven temperature?
A) 175°F
B) 100°F
C) 250°F
D) 500°F
  • 33. E stands for:
A) Edge
B) Earth
C) Electrode
D) Energy
  • 34. Rod lengths:
A) 1–2 feet
B) 9–18 inches
C) 20–30 inches
D) 3–6 inches
  • 35. MR or R:
A) Moisture resistant
B) Metal rod
C) Machine ready
D) Medium rated
  • 36. Base metal we use:
A) Aluminum
B) A36 mild steel
C) Stainless steel
D) Cast iron
  • 37. Light produced in welding:
A) Blue spectrum only
B) X‑ray emissions
C) Green infrared
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) Advanced Weld Standards
B) American Wire Service
C) American Welding Society
D) Arc Welding System
  • 40. Heat affected zone:
A) Metal altered but not melted
B) Joint line
C) Slag-covered area
D) Metal melted completely
  • 41. PJP:
A) Pressure Joint Process
B) Parallel Joint Pass
C) Partial Joint Penetration
D) Primary Joint Preparation
  • 42. CJP:
A) Controlled Joint Process
B) Cut Joint Position
C) Complete Joint Penetration
D) Central Joint Plane
  • 43. 1F:
A) Flat groove
B) Flat fillet
C) Vertical fillet
D) Overhead fillet
  • 44. 2F
A) Horizontal fillet
B) Vertical groove
C) Flat Fillet
D) Horizontal groove
  • 45. 3F
A) Overhead fillet
B) Flat fillet
C) Vertical fillet
D) Horizontal groove
  • 46. 4F:
A) Horizontal fillet
B) Overhead fillet
C) Vertical fillet
D) Flat groove
  • 47. 1G:
A) Flat groove
B) Overhead groove
C) Vertical groove
D) Flat fillet
  • 48. 2G:
A) Horizontal groove
B) Flat groove
C) Horizontal fillet
D) Vertical groove
  • 49. 3G:
A) Vertical groove
B) Overhead groove
C) Flat groove
D) Horizontal fillet
  • 50. 4G:
A) Vertical groove
B) Overhead groove
C) Flat groove
D) Horizontal fillet
  • 51. Weave:
A) Root buildup
B) Weld bead made with transverse movement
C) Slag brushing
D) Cleaning motion
  • 52. No large amount of ______ should be in the weld
A) Mercury
B) Sulphur
C) Oxygen
D) Hydrogen
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