Automation System
Several objectives are required to achieve a successful data base management program. These are availability of data, quality of data, and

compatibility of data
None of these
up-to-date data
transmission of data
desirability of data

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

it is impossible to write a control program for a machine in any other logic
None of these
All of these
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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Automation System
Pressure sensors:

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

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