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Which of the following operation is first performed?

A. Spot facing

B. Boring

C. Tapping

D. Drilling

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  10. The hole to be drilled for tapping is _________ the outside diameter of the thread on the tap.
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  24. Which of the following statement is correct regarding grinding of high carbon steel?
  25. The common welding error that occurs due to wrong speed, faulty preparation, and high / low current,…
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  28. A taper tap has
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