Automation System
A flexible manufacturing system may be:

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

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Automation System
The program counter:

counts the number of instructions that have been executed
is where arithmetic is done in a computer.
decides which program to run
None of these
contains the address of the next instruction to be executed

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Automation System
Time proportioning control:

cannot use a TM990 micro¬computer
is less efficient than normal PID control
None of these
can be used on a PM550 programmable process controller
a and b above.

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