Answer :
Backward curve fan has a non overloading characteristic simply because the pressing changes in static pressure do not overload the motor.
What is centrifugal fan?
A centrifugal fan means a kind of a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid
A centrifugal fan has some key characteristics such as low noise level and small air flow with a high increase in static pressure
So therefore, backward curve fan has a non overloading characteristic simply because the pressing changes in static pressure do not overload the motor.
Learn more about centrifugal fan:
https://brainly.com/question/14279841
#SPJ1