Welding Quiz | Welding Question and Answer for Practice

31. 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

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

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

33. In resistance welding, two electrodes are made of

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

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

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

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

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

36. 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

37. The electrodes are manufactured in two standard lengths namely

1. 350 mm and 250 mm
2. 350 mm and 450 mm
3. 400 mm and 500 mm
4. 12 inches and 10 inches

38. Which fuel gas is used for cutting deep under water?

1. Acetylene
2. Hydrogen
3. LPG
4. Methane

39. While gas cutting the nozzle should

1. almost touch the work
2. be 10 mm away from work
3. be 2 mm away from work
4. be 5 mm away from work

40. If the blowpipe is moved to and fro frequently while cutting the kerf will

1. be more
2. of correct size
3. be less
4. not be affected

41. The electrode size refers to

1. diameter of its core wire
2. diameter (overall) of electrode
3. thickness of flux coating
4. length of electrode

42. The top edge is melted round and the cut face is not smooth in gas cutting. This is due to

1. extremely slow cutting speed
2. insufficient acetylene pressure
3. the tip being held too high
4. too much cutting oxygen pressure

43. The position in which it is easiest to weld is

1. Flat
2. Vertical
3. Horizontal
4. Overhead

44. Which type of fire extinguisher is used in a welding shop?

1. Foam type extinguisher
2. Dry powder extinguisher
3. CO2 extinguisher
4. Halon extinguisher

45. If a worker has suffered from electric shock, he should be

1. given an alcoholic drink
2. given a cold drink
3. made to walk
4. kept warm and covered