Automation System
A stepping motor;

None of these
can index positional movement.
has a speed proportional to voltage input
is a good choice where continuous rotation is needed
has a commutator

ANSWER DOWNLOAD EXAMIANS APP

Automation System
Vision sensors:

will remain very costly
All of these
None of these
can not improve much in the next decade
will more closely match the capabilities of the human eye

ANSWER DOWNLOAD EXAMIANS APP

Automation System
Stepping motors:

do not require commutators
can be built to index different amounts by changing the pole configuration
All of these
can run at varying speeds
can run both clockwise and counterclockwise

ANSWER DOWNLOAD EXAMIANS APP