Automation System
A flexible manufacturing system may be:

All of these
expensive to alter
an automated assembly line
None of these
very difficult to change when new products are introduced

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Automation System
High-level languages:

cannot be used with automatic systems.
None of these
require knowledge of the computer design
are very difficult to use
are "procedure-oriented"

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

All of these
None of these
it is the best industrial control language ever developed.
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

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