Power System Earthing Interview Questions and Answers: 1. What is difference between system earthing and equipment earthing ? Ans. System earthing deals with earthing of the system neutral to ensure…

Protection of Feeders and Transmission Lines Interview Questions and Answers: 1. What is unit type protection ? Ans. Unit system of protection is one in which the protection responds to…

High Voltage DC Transmission Interview Questions and Answers: 1. Why is voltage regulation better in case of dc transmission ? Ans. Because of absence of inductance in dc systems. 2.…

High Voltage AC Transmission Interview Questions and Answers: 1. What are the transmission voltages that are used in India ? Ans. 33, 66, 110, 132, 220 and 400 kV. 765/800…

Interference of Power Lines Interview Questions and Answers: 1. How do power lines cause interference with neighbouring communication lines ? Ans. The transmission lines transmit bulk power at relatively higher…

Performance of Long Transmission Lines Interview Questions and Answers: 1. What is the range of surge impedance for an overhead transmission line ? Ans. 400-600 Ω. 2. What is the…

Performance of Short and Medium Transmission Lines Interview Questions and Answers: 1. What are the factors which govern the performance of a transmission line ? Ans. The factors governing the…

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…