Answer:
In engineering, the most basic or primary unit of measurement used for drafting is the millimeter and the meter, followed by the kilometer
Explanation:
Based on the the SI system of units, in engineering, the most basic or primary unit of measurement used for drafting is the millimeter and the meter, followed by the kilometer
The millimeter is used in mechanical and an architectural drawing, the meter is used architectural drawing, while civil dimensioning make use of the kilometer
In the US it is customary to use the inches and a fraction of an inch is used as a scale in scale drawings