Question 227General Subjects - QMED
70% to passIf a bolt or stud were to break off flush at the surface, which of the listed actions would probably be the best first step to begin the process of its removal?
AUse a tapered screw extractor only.
BHeat the bolt with an oxyacetylene torch.
CDrill a hole in the center of the broken stud.
DTap the bolt with a starting punch extractor.
AI Explanation
The correct answer is C) Drill a hole in the center of the broken stud. Drilling a hole in the center of the broken stud is generally the best first step to begin the process of removing a bolt or stud that has broken off flush with the surface. This creates a point of purchase to grip the broken end and extract it, without damaging the surrounding material. The other options are less effective - a tapered screw extractor may not grip the flush surface, heating the bolt can damage the surrounding area, and tapping with a punch may further deform the broken end.
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