Question

What is the factor which is by modern motors which are into a series of standard frames?

(a) current rating

(b) voltage rating

(c) power rating

(d) output rating

The question was posed to me during an interview.

The query is from Separation of D and L, Standard Frames in chapter General Concepts and Constraints in Design of Rotating Machines of Design of Electrical Machines

Answer 1

Right answer is (c) power rating

To elaborate: The modern motors for industrial applications is concentrated into a series of standard frames. The standard frames are used to cover a wide range of power ratings.