Automation System
The Ziegler-Nichols method:

a and b above
None of these
is a graphical solution method
is a method of control
can be used to determine gain factors of a PI loop

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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.
contains the address of the next instruction to be executed
decides which program to run
None of these

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