Question: Which of the following operation is first performed?
- Spot facing
- Boring
- Tapping
- Drilling
Answer: Drilling
| Operation |
Description |
Typical Sequence |
| Drilling |
The process of creating cylindrical holes in a workpiece using a rotating drill bit. |
Typically the initial operation. |
| Boring |
Enlarging or refining the diameter of existing holes or achieving precise dimensions and surface finish. |
Usually follows drilling for hole adjustment. |
| Tapping |
Creating internal threads in holes to allow screws or bolts to be threaded into the workpiece. |
Typically performed after drilling and/or boring. |
| Spot Facing |
Machining a flat, smooth surface around holes to ensure they are level and provide proper seating for bolts or fasteners. |
Typically done after drilling and tapping for surface preparation. |
