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

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

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Automation System
The program counter:

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

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Automation System
Digital signals:

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

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

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

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