Automation System
The program counter:

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

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Automation System
A stepping motor;

has a commutator
is a good choice where continuous rotation is needed
can index positional movement.
None of these
has a speed proportional to voltage input

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Automation System
Numerical control:

All of these
None of these
is a method for controlling the operation of a machine by means of a set of instructions
is a method for producing an exact number of parts per hour
applies only to milling machines

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