Automation System
A solenoid:

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

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

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

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Automation System
A common data base is one requisite for converting CAD and CAM to CIM. Another is that:

there should be a common 3-D part description system.
technical assistance must be provided to the user.
the user must have access to both hardware and software
the system must make provision for new techniques.
None of these

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Automation System
Light sensors:

never use infrared light as light source
cannot be used a s limit switches.
None of these
come in a wide variety of mounting styles
work in direct sunlight

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