Welding Multiple Choice Questions and Answers

51. The metals having good weldability, in descending order are

1. cast steel, iron, carbon steel, cast iron
2. carbon steel, iron, cast steel, cast iron
3. iron, carbon steel, cast steel, cast iron
4. cast iron, iron, carbon steel, cast steel

52. Which of the following types is not fillet weld?

1. butt joint
2. lap joint
3. T-joint
4. Corner joint

53. Which of the following is a weld joint?

1. butt and lap joints
2. T joints
3. Corner joints and edge joints
4. all of the above

54. Which of the processes can be classified as fusion welding?

1. Arc welding and Laser beam welding
2. Friction welding and Laser beam welding
3. Friction welding and Ultrasonic welding
4. Ultrasonic welding and Laser beam welding

55. Which of the following is an example of fusion welding?

1. Arc welding
2. Forge welding
3. Resistance welding
4. Thermit welding with pressure

56. In resistance welding, two electrodes are made of

1. Aluminium
2. Copper
3. Iron
4. Bronze

57. In arc welding, arc initiation voltage is of the order

1. 20-60V
2. 60-100V
3. 100-140V
4. 140-180V

58. The temperature of arc in case of arc welding is

1. 2000°C
2. 2600°C
3. 3000°C
4. 3600°C

59. Single-V and single-U butt welds are used for sheets of thickness upto

1. 10mm
2. 5-15mm
3. 10-20mm
4. 15-25mm

60. Which of the gases can be used to form a protective envelope in arc welding?

1. Oxygen and Carbon dioxide
2. Hydrogen and Helium
3. Oxygen and Helium
4. Helium and Carbon dioxide