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

derivative control does not eliminate offset error
integral control has slower response to an error signal.
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:

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

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Automation System
Digital signals:

can have three possible levels
None of these
have a sinusoidal shape.
are assigned values of 1 or 0 depending on the voltage level
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:

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

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