Automation System
An aneroid barometer

None of these
can measure only atmospheric pressure
measures pressure by sensing deflection of an evacuated chambers.
can be used to measure gas or liquid flow rates
is very unreliable

ANSWER DOWNLOAD EXAMIANS APP

Automation System
An encoder:

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

ANSWER DOWNLOAD EXAMIANS APP