Electric Traction Motors Interview Questions and Answers: 1. Why the magnetic circuit of a traction motor is not made of cast iron ? Ans. Because cast iron cannot withstand continuous…
Substations Interview Questions and Answers: 1. State any four types of substations according to the service ? Ans. The substations, according to the service rendered are: Transformer substations, Switching substations,…
Protective Relays Interview Questions and Answers: 1. What is a protective relay ? Ans. Protective relay is an electrical device designed to initiate isolation of a part of an electrical…
Fuses Interview Questions and Answers: 1. What is meant by a fuse ? Ans. Fuse is a device used in an electrical circuit for protecting electrical equipment's against overloads and/or…
Underground Cables Interview Questions and Answers: 1. For what purpose metallic sheath is provided in underground cables ? Ans. The metallic sheath is provided around the insulation to protect it…
Transmission Line Constants Interview Questions and Answers: 1. Distinguish between ac and dc resistances of a conductor. Why the two differ ? Ans. The resistance offered to dc, by a…
Corona Interview Questions and Answers: 1. What is corona ? Ans. When the voltage between conductors of an overhead line exceeds the disruptive critical voltage value, a hissing noise accompanied…
Mechanical Design of Overhead Lines Interview Questions and Answers: 1. What are the various components of an overhead line ? Ans. The main components of an overhead line are supports/towers,…