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The operation of smoothing and squaring the surface around a hole is known as
Answer & Solution
Correct Answer:
Option
D
The most common application of spot facing (spot facing) is facing the area around a bolt hole where the bolt's head will sit, which is often done by cutting a shallow counter bore, just deep enough "to clean up"—that is, only enough material is removed to get down past any irregularity and thus make the surface flat.
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Logincounter boring is to make head of nut square type
counter sinking make head of nut cone type