Automation System
Which technique enables the designer to mold and shape, rather than construct on object using a series of lines?

None of these
Wire-frame modeling
Surface modeling
Solid modeling
FEM (Finite Element Modeling)

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

All of these
it is impossible to write a control program for a machine in any other logic
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 the best industrial control language ever developed.

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