Automation System
A semi-continuous operation means:

each operation in a sequence is continuous, but subsequent operations in the sequence may be different.
coffee breaks are allowed for the operator
the operation is continuous each shift, but stops between shifts
a computer is a required part of the machine
None of these

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Automation System
The main function(s) of computer in CAD is/are

To relieve the designer from routine repetitious tasks.
To serve as an extension to the memory of the designer
All of these
None of these
To enhance the analytical and logical power of the designer

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Automation System
A sequence controller:

None of these
is a mechanical only controller
performs on/off control functions in relation to time.
is difficult to program
is no longer in widespread use

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