Automation System
One of the following is not considered a method of input control in a CAD system.

None of these
Touch terminal
Plotter
Programmable function box
Joystick

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

All of these
it is the best industrial control language ever developed.
it is impossible to write a control program for a machine in any other logic
most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use
None of these

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Automation System
The program counter:

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

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Automation System
Programmable controllers:

(a) and (c) above
cannot perform functions other than relay logic
are widely used in many different industries
are programmed using relay ladder logic
None of these

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