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