Welding MCQ Questions and Answers Quiz

11. 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

12. 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

13. 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

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

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

15. 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

16. 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

17. The arc utilized in electric arc welding is a

  1. High voltage, high current discharge
  2. Low voltage, low current discharge
  3. Low voltage, high current discharge
  4. High voltage, low current discharge

18. The size of a welding machine is determined by

  1. Input amperage
  2. Output amperage
  3. Open circuit voltage
  4. Closed circuit voltage

19. If L (mm) is the length of the inner cone of the flame, the tip-to-metal distance should be

  1. L mm
  2. L + 2 mm
  3. L + 4 mm
  4. L + 6 mm

20. In a gas cut plate, the cut is high quality although there is some surface roughness caused by vertical drag lines. This is due to

  1. less preheating flame
  2. impure cutting oxygen
  3. too slow cutting speed
  4. smaller size cutting nozzle
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