Automation System
Operator interaction directly with the CRT is accomplished via:

a stylus
a touch terminal
None of these
a digitizing tablet
vector scanning

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Automation System
The use of specialized workstations:

provides limited growth potentials for 3-D
reduces the host computer workload
None of these
has a high cost-performance tradeoff
reduces the host computer workload and allows more users

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Automation System
Programmable controllers:

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

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Automation System
Numerical control:

is a method for controlling the operation of a machine by means of a set of instructions
None of these
applies only to milling machines
All of these
is a method for producing an exact number of parts per hour

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