Automation System
In pen plotters, "resolution" refers to the shortest possible line, but in electrostatic plotters it refers to:

the speed per inch
None of these
the number of dots per inch
how accurately the plotter returns to a specific point
dual-axis tracking

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Automation System
Light sensors:

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

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Automation System
An encoder:

None of these
is used to send telegraph signals
can have only four keys
converts an input to a binary number
converts a binary number to a decimal number.

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Automation System
The computer graphics system called SKETCHPAD was demonstrated at

Imperial college of Science and Technology, London, 1973
None of these
Massachusetts Institute of Technology in 1963
Cranfield Institute of Technology, London, 1962
University of Aston, Birmingham, 1960

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