Automation System
A favourable reason for automation is to:

decrease throughput
increase number of operations
None of these
perform difficult operations
raises assembly cost

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Automation System
Digital signals:

have a frequency measured in units of hertz
None of these
have a sinusoidal shape.
can have three possible levels
are assigned values of 1 or 0 depending on the voltage level

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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
results in a binary code as the final output
both (b) and (c)

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