Automation System
A solenoid:

is widely used in industrial automation
is related to an aneroid
is spring operated
can be used only in de circuits
None of these

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Automation System
High-level languages:

are very difficult to use
are "procedure-oriented"
None of these
cannot be used with automatic systems.
require knowledge of the computer design

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Automation System
Time proportioning control:

cannot use a TM990 micro¬computer
can be used on a PM550 programmable process controller
None of these
a and b above.
is less efficient than normal PID control

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