Automation System
A drum timer is a good example of:

None of these
an input sensor
a sequence controller
a position sensor
an output actuator

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Automation System
D/A (digital to analog) conversion:

None of these
must be fed through a filter to reproduce the original signal accurately
has to be sampled at 1/2 the highest input frequency
both (b) and (c)
results in a binary code as the final output

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Automation System
The computer graphics system called SKETCHPAD was demonstrated at

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

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Automation System
A venturi tube:

is made only of metal
measures the presence of a liquid
can be used to measure gas or liquid flow rates
None of these
is extremely difficult to use

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