Automation System
A sequence controller:

performs on/off control functions in relation to time.
is a mechanical only controller
is difficult to program
None of these
is no longer in widespread use

ANSWER DOWNLOAD EXAMIANS APP

Automation System
A venturi tube:

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

ANSWER DOWNLOAD EXAMIANS APP