ITPEC IP April 2024 Question 89

Using computers in the design of buildings and industrial products — CAD stands for computer-aided design.

CAD software creates and edits drawings and 3D models on screen instead of on a drafting board. Designs are stored as data, so they can be changed, reused, checked by simulation and passed on to manufacturing; CAM (computer-aided manufacturing) uses the same data to drive machine tools.

Answer (b)

Why not others:

• •(a) — a circuit that converts an analog signal into a digital signal is an A/D converter (ADC), a look-alike abbreviation
• •(c) — an imaging element that converts light into an electrical signal is an image sensor such as a CCD or CMOS sensor
• •(d) — combining characters, images, audio and other data into one piece of content is multimedia authoring

Key rule: CAD is design by computer, CAM is manufacturing by computer from the design data; together they form the engineering systems of a factory.

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