What information is typically included in the title block of a blueprint?

The title block on a blueprint serves as an essential area for conveying key information about the drawing. It typically includes the blueprint author's name, which helps identify who created the document, as well as the project date, indicating when the drawing was produced. This information is vital for tracking revisions and understanding the context of the design.

Additionally, the title block often features the scale of the drawing, which informs users of the relationship between the dimensions on the blueprint and their actual measurements in the physical world. This aspect is crucial for accurate interpretation and implementation of the designs presented in the blueprint.

Together, these elements—author's name, project date, and scale—combine to provide a complete representation of the blueprint's vital details, allowing anyone referencing the document to understand its origin and purpose clearly. This comprehensive inclusion of information makes option D the correct choice.