Automation System
Light sensors:

None of these
cannot be used a s limit switches.
work in direct sunlight
never use infrared light as light source
come in a wide variety of mounting styles

ANSWER DOWNLOAD EXAMIANS APP

Automation System
A solenoid:

is spring operated
is widely used in industrial automation
can be used only in de circuits
is related to an aneroid
None of these

ANSWER DOWNLOAD EXAMIANS APP