Automation System
Robots consist of three basic components; power supply, control (memory) console, and:

software
None of these
mechanical unit (arm)
coaxial cable
microcomputer

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Automation System
Semiconductor devices:

have a very short infant mortality period
All of these
None of these
are less reliable than electro¬mechanical components
usually have a very short MTBF (mean time between failure)

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Automation System
Programmable controllers:

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

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