Question

What is the concept of power rating of machines with respect to voltage?

(a) the required supply voltage for smooth running of the machine

(b) the required supply voltage for stopping the machine

(c) the required supply voltage for speeding the machine

(d) the required supply voltage for slowing up the machine

The question was posed to me by my school principal while I was bunking the class.

I'd like to ask this question from Rating of Machines topic in division Thermal Design Aspects of Electrical Machines & D.C of Design of Electrical Machines

Answer 1

Right answer is (a) the required supply voltage for smooth running of the machine

To elaborate: Power rating is nothing but the standard value at which the machine is said to be safe in operation. Rating determines the voltage which allows the smooth running of the machine.