Question

What is the main objective of power ratings of machines?

(a) helps in building a suitable thermal model of machines

(b) helps in building a suitable physical model of machines

(c) helps in classifying the machines into different types

(d) helps to improve the machine efficiency

I got this question in class test.

My question is based upon Rating of Machines in portion Thermal Design Aspects of Electrical Machines & D.C of Design of Electrical Machines

Answer 1

The correct answer is (a) helps in building a suitable thermal model of machines

To elaborate: The power ratings, mainly help in building the thermal model. It helps in reducing the heat losses and helps in bringing out a smooth and efficient operation of the machines.