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Diesel Mechanic Practice Test: Welding
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Diesel Mechanic Practice Test: Welding
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25 Questions

1. Why the cylinder keys are not removed from the cylinder while welding?
2. The welding machine, which is used to convert AC welding supply to DC welding supply is………
3. If L (mm) is the length of the inner cone of the flame, the tip-to-metal distance should be………
4. Which is the welding machine designed to supply both AC and DC current?
5. Which brush is used for cleaning the welding slag?
6. What is the storing capacity of oxygen cylinder?
7. Which factor determines the current setting during welding?
8. The electrodes are manufactured in two standard lengths namely…………….
9. The position in which it is easiest to weld is………….
10. The arc utilized in electric arc welding is a……….
11. The function of the central hole in the tip of the cutting blowpipe is……………..
12. How the gas cylinders are kept in the trolley in gas welding plant?
13. In gas cutting, if too little cutting oxygen is supplied…………….
14. What is the position of blow pipe nozzle while igniting the flame?
15. Metal inert gas welding is also called-----
16. Neutral flame in gas welding contains
17. One of the functions of electrode coating is………………
18. Which type of gas flame is the most suitable for brazing?
19. While gas cutting the nozzle should…………….
20. What is the disadvantage of AC welding transformer?
21. If the blowpipe is moved to and fro frequently while cutting the kerf will…………
22. What is the OCV for welding in step-down transformer which reduces the main supply voltage (220 or 440 volts)?
23. Which arc welding machine can be used anywhere in the field work even away from electric lines?
24. Acetylene is a fuel gas for gas cutting & welding composed of…………..
25. What is meant by polarity?

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