Automation System
An encoder:

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

ANSWER DOWNLOAD EXAMIANS APP

Automation System
Digital signals:

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

ANSWER DOWNLOAD EXAMIANS APP