Automation System
Direct Numerical Control means:

complete elimination of a need for a human operator.
using several computers to control one large machine
using one computer to control several machines
None of these
eliminating computers from the manufacturing process

ANSWER DOWNLOAD EXAMIANS APP

Automation System
Light sensors:

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

ANSWER DOWNLOAD EXAMIANS APP

Automation System
Relay ladder logic is used in a PC because:

All of these
it is the best industrial control language ever developed.
None of these
it is impossible to write a control program for a machine in any other logic
most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use

ANSWER DOWNLOAD EXAMIANS APP