Question

What is the maximum width of the bands placed on the end windings of induction machines and high speed dc machines?

(a) 30 mm

(b) 35 mm

(c) 40 mm

(d) 45 mm

This question was addressed to me in an interview for internship.

Query is from Bracing of Rotor Windings topic in chapter Aspects of Design of Mechanical Parts of Design of Electrical Machines

Answer 1

Right option is (c) 40 mm

For explanation I would say: The maximum width are obtained for the bands placed on the end windings of induction machines and high speed dc machines. The maximum width is 40 mm.