21. The welding machine, which is used to convert AC welding supply to DC welding supply is
22. The correct flame for preheating before cutting is
23. Neutral flame in gas welding contains
24. In DC welding heat distribution is possible between electrode and the base metal due to the change of polarity. The distribution of heat is
25. The correct colours for oxygen and acetylene hoses are:
26. Which one of the following is the type of transformer used in arc welding?
27. Cast iron contains two elements, which make it difficult to cut it by gas cutting. What are these elements?
28. The function of the central hole in the tip of the cutting blowpipe is
29. In gas cutting, if too little cutting oxygen is supplied
30. The size of the cutting nozzle used in oxy-acetylene cutting process depends mainly on
MCQ Multiple Choice Questions and Answers on Welding
Welding Trivia Questions and Answers PDF
Welding Question and Answer
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