What are the four steps in making a sketch?

• A. Block in the space and basic shape used for the sketch, Add details to the basic block, Darken lines that are to show up as visible lines in the finished sketch, Add dimensions and any other information that will make the sketch more usable.
• B. Draw only the outline, add color, add shading, check scale.
• C. Start with a photograph, measure, transfer, annotate.
• D. Write the description, create a 3D model, generate a printable file, review.

Answer: (A)

In technical sketching, you start by blocking in the space and basic shape to establish the overall proportions and layout before adding any details. This gives you a clear framework and helps ensure the drawing will be to scale and correctly oriented. Next, you add details to that basic block, refining edges and features so the form is accurately represented without worrying about final line quality yet. Then you darken the lines that are intended to show up as visible edges in the finished sketch, making the important contours stand out and separating them from construction lines that will be removed or faded. Finally, you add dimensions and any other information that will make the sketch usable for engineering or fabrication, such as tolerances, notes, and callouts.

This progression—from establishing the basic shape, through adding detail, to emphasizing the final visible lines, and then annotating with measurements—is why the sequence aligns with making a practical, communicative sketch. The other options involve coloring or artistic shading, starting from photographs, or moving into 3D modeling and file generation, which are not the standard four-step approach for a technical sketch.