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. |