Question

What is the work of the frame of dc machines?

(a) to reduce the voltage

(b) to reduce the flux

(c) to carry the flux

(d) to carry the current

The question was posed to me by my college director while I was bunking the class.

The origin of the question is Frames of D.C. & A.C. Machines topic in portion Aspects of Design of Mechanical Parts of Design of Electrical Machines

Answer 1

Right option is (c) to carry the flux

To explain: The main function of the frame of dc machines is to carry the flux. Thus the frame must be large enough to carry flux.