Automation System
The program counter:

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

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Automation System
What is offset error?

the difference between the control setpoint value and the actual value.
the difference between the controller output and the setting of the manipulated variable.
None of these
All of these
the difference between the sensor input and the absolute sensed parameter.

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Automation System
D/A (digital to analog) conversion:

has to be sampled at 1/2 the highest input frequency
both (b) and (c)
results in a binary code as the final output
None of these
must be fed through a filter to reproduce the original signal accurately

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Automation System
The computer graphics system called SKETCHPAD was demonstrated at

Massachusetts Institute of Technology in 1963
Imperial college of Science and Technology, London, 1973
University of Aston, Birmingham, 1960
Cranfield Institute of Technology, London, 1962
None of these

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