Question

what is the revision block used for?
○ to show if the drawing has passed the faa requirements
○ to show if the drawing has passed inspection
○ to show if the drawing is current or has been revised
○ to show when the drawing was started and finished

Explanation:

The revision block in technical drawings (often in engineering contexts, which falls under Natural Science - Engineering subfield) is used to indicate the revision status of the drawing, i.e., whether it is the current version or has been revised. The other options: showing FAA requirements is not the main purpose of a revision block, inspection status is usually indicated by other means, and start/finish times of drawing are not related to a revision block.

Answer:

To show if the drawing is current or has been revised