11. Which of the following method of speed control of D.C. machine will offer minimum efficiency?
12. A D.C. series motor is that which
13. Sparking at the commutator of a D.C. motor may result in
14. For which of the following applications a D.C. motor is preferred over an A.C. motor?
15. Which D.C. motor has got maximum self relieving property?
Read More Section(D.C. Motors)
Each Section contains maximum 70 questions. To get more questions visit other sections.