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12-11-25 Welding Midterm Review 2025
Поширений: Sandifer
  • 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) Flow of electricity through a gaseous space or air gap
B) Light from welding
C) A joint type that lets light fly around everywhere
D) A type of electrode
  • 3. What is arc length?
A) The distance from the gap between plates and the clamp wire
B) The distance from the electrode to the weld pool
C) Length of the rod
D) Length of the weld
  • 4. What is undercut?
A) Extra filler metal
B) A surface crack
C) A grove melted into the base metal that is a misaligned joint
D) A groove melted into base metal left unfilled
  • 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 depression in the face of the weld
D) A porosity pocket in the face of the weld
  • 6. What is the axis of weld?
A) Imaginary line through weld toe
B) Imaginary line through center of weld metal
C) Imaginary line through top of the bead
D) Imaginary line through HAZ boundary
  • 7. What is spatter?
A) Metal particles 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) Gas bubbles expelled that do not form part of the weld
  • 8. What is slag inclusion?
A) Non-metallic material trapped in weld
B) Undercut failure
C) Steel trapped in slag
D) Hot cracks trapped in the weld pool at the end
  • 9. What is a joint?
A) filler metal
B) Location where two or more members are joined
C) a welding defect
D) The end of the metal piece that is welded first.
  • 10. What is a crater crack?
A) A crack in the crater of a weld bead
B) A centerline crack
C) A cold shut
D) A stress fracture formed cause metal was too clean
  • 11. What is ductility
A) Ability to stay magnetized
B) Ability to deform without failure
C) Ability to remain cold.
D) Ability to resist rust
  • 12. What is duty cycle?
A) Arc stability rating
B) Electrode burn rate is working nonstop
C) Machine lifespan over a 10 min period
D) Percentage of time welders operate at rated output
  • 13. What is filler metal?
A) Flux coating
B) Metal base plate
C) Distance fusion extends into base metal
D) Metal added to make a welded joint
  • 14. What is depth of fusion?
A) Distance bead width extends
B) Distance fusion extends into base metal
C) Rod penetration
D) Weld height
  • 15. What is penetration?
A) Arc reach
B) Bead surface depth
C) Slag depth
D) Extent weld metal combines with base metal
  • 16. What is deposition rate?
A) Weight of metal deposited per unit time
B) Amount of slag produced
C) Heat generated
D) Length welded per hour
  • 17. What does SMAW stand for?
A) Shielded Metal Arc Welding
B) Shielded Mechanical Arc Welding
C) Stick Metal Arc Work
D) Solid Metal Arc Welding
  • 18. What is SMAW?
A) Uses tungsten electrode
B) Uses heat of an arc between covered electrode and the work
C) Purely mechanical process
D) Uses shielding gas
  • 19. Advantage of SMAW?
A) High speed
B) Fully automated
C) No slag
D) Portable and inexpensive
  • 20. Disadvantage of SMAW?
A) Only works indoors
B) It’s slow
C) Cannot weld steel
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) Straight polarity
C) Reverse polarity
D) Alternating ground
  • 23. Reverse polarity:
A) No polarity exists
B) Electrode is positive, ground negative
C) Electrode negative
D) Ground floats
  • 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) Carbon rod
C) Consumable electrode covered with flux
D) MIG wire
  • 26. Strength of 7018 rod:
A) 18k psi
B) 70k psi
C) 120k psi
D) 40k psi
  • 27. Meaning of 3rd digit in 7018:
A) Welding position
B) Positive polarity rod
C) Coating type
D) Rod length
  • 28. Meaning of 4th digit in 7018:
A) Diameter
B) Composition of rod
C) Strength
D) Arc length
  • 29. Four rod groups:
A) Soft rods, hard rods, hot rods, cold rods
B) Celluosic, Rutile, Basic/low Hydrogen, Iron Powder
C) Inert, reactive, passive, active
D) High carbon, low carbon, stainless, alloy
  • 30. DCEP:
A) Direct Current Electrode Positive
B) Dual Current Electrode Phase
C) Direct Current Elevated Pressure
D) Direct Coil Energy Pulse
  • 31. Why put rods in oven?
A) sterilize
B) Reduce moisture
C) heat for penetration
D) Prevent Bending
  • 32. Minimum oven temperature?
A) 250°F
B) 500°F
C) 175°F
D) 100°F
  • 33. E stands for:
A) Energy
B) Edge
C) Earth
D) Electrode
  • 34. Rod lengths:
A) 1–2 feet
B) 3–6 inches
C) 9–18 inches
D) 20–30 inches
  • 35. MR or R:
A) Machine ready
B) Metal rod
C) Medium rated
D) Moisture resistant
  • 36. Base metal we use:
A) Stainless steel
B) Cast iron
C) A36 mild steel
D) Aluminum
  • 37. Light produced in welding:
A) Green infrared
B) X‑ray emissions
C) Blue spectrum only
D) Electro violet and ultra red light
  • 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) Advanced Weld Standards
B) American Welding Society
C) American Wire Service
D) Arc Welding System
  • 40. Heat affected zone:
A) Joint line
B) Metal altered but not melted
C) Slag-covered area
D) Metal melted completely
  • 41. PJP:
A) Primary Joint Preparation
B) Pressure Joint Process
C) Partial Joint Penetration
D) Parallel Joint Pass
  • 42. CJP:
A) Cut Joint Position
B) Controlled Joint Process
C) Central Joint Plane
D) Complete Joint Penetration
  • 43. 1F:
A) Flat fillet
B) Vertical fillet
C) Flat groove
D) Overhead fillet
  • 44. 2F
A) Flat Fillet
B) Horizontal groove
C) Vertical groove
D) Horizontal fillet
  • 45. 3F
A) Flat fillet
B) Overhead fillet
C) Horizontal groove
D) Vertical fillet
  • 46. 4F:
A) Flat groove
B) Vertical fillet
C) Horizontal fillet
D) Overhead fillet
  • 47. 1G:
A) Vertical groove
B) Overhead groove
C) Flat groove
D) Flat fillet
  • 48. 2G:
A) Horizontal fillet
B) Horizontal groove
C) Flat groove
D) Vertical groove
  • 49. 3G:
A) Flat groove
B) Vertical groove
C) Overhead groove
D) Horizontal fillet
  • 50. 4G:
A) Vertical groove
B) Flat groove
C) Overhead groove
D) Horizontal fillet
  • 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) Hydrogen
B) Mercury
C) Sulphur
D) Oxygen
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