Welding MCQ Questions and Answers Quiz

31. One of the functions of electrode coating is

  1. to increase welding current
  2. to stabilize the arc
  3. to prevent rusting
  4. to control arc temperature

32. In an acetylene cylinder, the acetylene is dissolved in

  1. Water
  2. Carbon Dioxide
  3. Acetone
  4. Mercury

33. Which one of the following is a temporary joint?

  1. Welded joint
  2. Riveted joint
  3. Soldered joint
  4. Press fit joint

34. In fusion welding, penetration is the ratio of

  1. width of the weld to its depth
  2. length of the weld to its depth
  3. depth of the weld to its width
  4. depth of the weld to its length

35. Which of the following joint have high corrosion resistance?

  1. Welding joint
  2. Riveted joint
  3. Bolted joint
  4. None of the above

36. Which of the following is a design recommendation for welding?

  1. Welded assemblies should have more parts
  2. Welding should be done horizontally, with the stick or electrode holder pointing upward during welding
  3. The buildup of weld fillets should be kept to a minimum
  4. Locate welds where special finishing operations are required

37. Which of the following processes do not use flux during welding?

  1. Submerged Arc
  2. Oxyfuel
  3. Flux Cored Arc
  4. Friction

38. Which of the following is not a resistance welding?

  1. Spot welding
  2. Butt welding
  3. Pressure welding
  4. Percussion welding

39. The resistance welding process suitable for welding ferrous and non-ferrous metals upto 8mm thickness is

  1. Spot welding
  2. Projection welding
  3. Butt welding
  4. Pressure welding

40. Which of the following is false regarding welding process and its corresponding minimum thickness of plate material?

  1. Shielded-Metal Arc or Stick Weldments: minimum thickness - 1.5 mm
  2. Submerged Arc Weldments: minimum thickness - 4.5mm
  3. Flux-Cored Weldments: minimum thickness - 4.5 mm
  4. Gas-Metal Arc Weldments: minimum thickness - 0.5 mm and even thinner

MCQ Multiple Choice Questions and Answers on Welding

Welding Question and Answer