12-11-25 Welding Midterm Review 2025
  • 1. What is the base metal?
A) The shielding gas makes sparks
B) The metal to be welded
C) The flux coating
D) The weld bead
  • 2. What is an arc?
A) Light from welding
B) Flow of electricity through a gaseous space or air gap
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) Length of the weld
C) The distance from the gap between plates and the clamp wire
D) The distance from the electrode to the weld pool
  • 4. What is undercut?
A) A groove melted into base metal left unfilled
B) Extra filler metal
C) A surface crack
D) A grove melted into the base metal that is a misaligned joint
  • 5. What is a crater?
A) A buildup of slag 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 melted rod tip in the face of the weld
  • 6. What is the axis of weld?
A) Imaginary line through weld toe
B) Imaginary line through HAZ boundary
C) Imaginary line through top of the bead
D) Imaginary line through center of weld metal
  • 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) 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) Non-metallic material trapped in weld
B) Hot cracks trapped in the weld pool at the end
C) Undercut failure
D) Steel trapped in slag
  • 9. What is a joint?
A) Location where two or more members are joined
B) filler metal
C) The end of the metal piece that is welded first.
D) a welding defect
  • 10. What is a crater crack?
A) A centerline crack
B) A cold shut
C) A stress fracture formed cause metal was too clean
D) A crack in the crater of a weld bead
  • 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) 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) 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 bead width extends
C) Distance fusion extends into base metal
D) Weld height
  • 15. What is penetration?
A) Extent weld metal combines with base metal
B) Slag depth
C) Bead surface depth
D) Arc reach
  • 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) Solid Metal Arc Welding
B) Stick Metal Arc Work
C) Shielded Metal Arc Welding
D) Shielded Mechanical Arc Welding
  • 18. What is SMAW?
A) Uses tungsten electrode
B) Uses heat of an arc between covered electrode and the work
C) Uses shielding gas
D) Purely mechanical process
  • 19. Advantage of SMAW?
A) Portable and inexpensive
B) No slag
C) High speed
D) Fully automated
  • 20. Disadvantage of SMAW?
A) It’s slow
B) Requires gas bottles
C) Cannot weld steel
D) Only works indoors
  • 21. 7018 can use:
A) DC only
B) AC or DC
C) Neither
D) AC only
  • 22. What polarity do we weld with?
A) Alternating ground
B) No polarity
C) Straight polarity
D) Reverse polarity
  • 23. Reverse polarity:
A) Ground floats
B) No polarity exists
C) Electrode is positive, ground negative
D) Electrode negative
  • 24. Two safety points:
A) Always weld outside use sitka gloves
B) Proper ventilation and protective clothing
C) Avoid using gloves never safety glasses
D) Use small rods and low heat
  • 25. SMAW electrode:
A) TIG tungsten
B) Consumable electrode covered with flux
C) Carbon rod
D) MIG wire
  • 26. Strength of 7018 rod:
A) 18k psi
B) 40k psi
C) 70k psi
D) 120k psi
  • 27. Meaning of 3rd digit in 7018:
A) Positive polarity rod
B) Rod length
C) Coating type
D) Welding position
  • 28. Meaning of 4th digit in 7018:
A) Diameter
B) Strength
C) Arc length
D) Composition of rod
  • 29. Four rod groups:
A) Soft rods, hard rods, hot rods, cold rods
B) High carbon, low carbon, stainless, alloy
C) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
D) Inert, reactive, passive, active
  • 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) sterilize
B) Prevent Bending
C) heat for penetration
D) Reduce moisture
  • 32. Minimum oven temperature?
A) 250°F
B) 500°F
C) 175°F
D) 100°F
  • 33. E stands for:
A) Electrode
B) Edge
C) Earth
D) Energy
  • 34. Rod lengths:
A) 3–6 inches
B) 9–18 inches
C) 20–30 inches
D) 1–2 feet
  • 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) Aluminum
C) A36 mild steel
D) Cast iron
  • 37. Light produced in welding:
A) Electro violet and ultra red light
B) Green infrared
C) Blue spectrum only
D) X‑ray emissions
  • 38. Five joint types:
A) Curve, twist, bend, fold, lock
B) Arc, gas, flux, rod, plate
C) Root, face, toe, leg, web
D) Lap, butt, edge, corner, T-joint
  • 39. AWS:
A) American Welding Society
B) Arc Welding System
C) American Wire Service
D) Advanced Weld Standards
  • 40. Heat affected zone:
A) Joint line
B) Metal altered but not melted
C) Slag-covered area
D) Metal melted completely
  • 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) Cut Joint Position
C) Central Joint Plane
D) Complete Joint Penetration
  • 43. 1F:
A) Overhead fillet
B) Flat fillet
C) Flat groove
D) Vertical fillet
  • 44. 2F
A) Horizontal groove
B) Flat Fillet
C) Horizontal fillet
D) Vertical groove
  • 45. 3F
A) Horizontal groove
B) Overhead fillet
C) Flat fillet
D) Vertical fillet
  • 46. 4F:
A) Horizontal fillet
B) Overhead fillet
C) Vertical fillet
D) Flat groove
  • 47. 1G:
A) Vertical groove
B) Flat fillet
C) Overhead groove
D) Flat groove
  • 48. 2G:
A) Horizontal groove
B) Horizontal fillet
C) Flat groove
D) Vertical groove
  • 49. 3G:
A) Flat groove
B) Vertical groove
C) Horizontal fillet
D) Overhead groove
  • 50. 4G:
A) Overhead groove
B) Vertical groove
C) Flat groove
D) Horizontal fillet
  • 51. Weave:
A) Cleaning motion
B) Weld bead made with transverse movement
C) Root buildup
D) Slag brushing
  • 52. No large amount of ______ should be in the weld
A) Hydrogen
B) Mercury
C) Oxygen
D) Sulphur
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