Question

What is the meaning of stiffness?

(a) ability to transmit the power

(b) ability to withstand the weight of the rotor

(c) ability to withstand unbalanced magnetic pull

(d) ability to withstand the weight of rotor and unbalanced magnetic pull

I have been asked this question during an online interview.

I need to ask this question from Design of Shaft in section Aspects of Design of Mechanical Parts of Design of Electrical Machines

Answer 1

Right option is (d) ability to withstand the weight of rotor and unbalanced magnetic pull

The explanation: The diameter of shaft for an electrical machine is determined by considerations of stiffness. The stiffness is the ability to withstand the weight of rotor and unbalanced magnetic pull.