Which type of engineering design uses an already existing design? A. top-down design
B. spiral design
C. bottom-up design
D.
incremental design

The correct option is;

C. Bottom-up design

Explanation:

The bottom-up design is meant for system redesign or re-engineering of an existing design involving component upgrading or legacy systems replacement

The bottom-up design approach is also meant for applications where there is a new interface requirement for the original system in order to determine the functionality of the newly combined systems and also where a novel component is incorporated into the existing design.

The bottom-up approach starts with the analysis of the interoperability of the components to the modules and eventually the analysis of the system requirements.

unlike the threaded fasteners which are used to clamp the machine members, power screws are used to transmit power. common applications of power screws are: screw jacks: to lift weight. lead screw of lathe: for axial movement of tool and its precise positioning.