Automation System
A set of well-defined procedures based on mathematical and geometric formulas for solving a problem in a finite number of steps is called:

arithmetic logic
None of these
a permutation
an algorithm
a geometric model

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Automation System
Programmable controllers:

cannot perform functions other than relay logic
are programmed using relay ladder logic
are widely used in many different industries
(a) and (c) above
None of these

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Automation System
A sequence controller:

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

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