In induction motors, the length of air gap in kept as small as mechanically possible is order to have

A. worst, ventilation B. poor ventilation C. better ventilation D. none of the above

A. Tractive B. Portative C. Either of the above D. None of the above

A. Method of average losses B. Equivalent current method C. Equivalent torque method D. Equivalent power method E. All of the above

A. solid B. hollow C. perforated D. any ofthe above