Automation System
The main activity(ies) of Designer in CAD is/are:

Organisation of design information
Control of the design process in information distribution.
Application of creativity, ingenuity, and experience.
None of these
All of these

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Automation System
Direct Numerical Control means:

using several computers to control one large machine
using one computer to control several machines
complete elimination of a need for a human operator.
None of these
eliminating computers from the manufacturing process

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Automation System
Relay ladder logic is used in a PC because:

None of these
most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use
it is impossible to write a control program for a machine in any other logic
All of these
it is the best industrial control language ever developed.

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