Automation System
What is the difference between integral and derivative control?

integral control has slower response to an error signal.
derivative control does not eliminate offset error
None of these
derivative control responds to a change in the rate of change in the error signal
All of these

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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
Digital signals:

are assigned values of 1 or 0 depending on the voltage level
have a sinusoidal shape.
None of these
can have three possible levels
have a frequency measured in units of hertz

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Automation System
There are several procedures you can implement to provide maximum security. The most important of these is:

do not allow unbonded service people to work on your equipment
Verify the reputation of the people installing your system
run regular simulated tests using TARP (testing of Applications Recovery Planes)
None of these
do not leave training manuals unsecured

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