Automation System
High-level languages:

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

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Automation System
Pressure sensors:

use capacitive variations to sense pressure
use an aneroid chamber with a variable resistance output
None of these
All of these
use the piezoresistive effect in strain gauge sensors

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Automation System
Relay ladder logic is used in a PC because:

All of these
None of these
it is impossible to write a control program for a machine in any other logic
it is the best industrial control language ever developed.
most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use

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