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