Important MCQ on Power systems -8
Important multiple choice questions in Power systems 1. To limit current chopping in vacuum circuit breakers, the contact material used has a) High vapour pressure and low conductivity properties b) High vapour pressure and high conductivity properties c) Low vapour pressure and high conductivity properties d) Low vapour pressure and low conductivity properties 2. For the same rupturing capacity, the actual current to be interrupted by an HRC fuse is a) Much less than any circuit breaker b) Much more than any circuit breaker c) Equal to the circuit breaker d) None of these 3. For protection of parallel feeders fed from one end, the relays required are a) Non-directional relays at the source end and directional relays at the load end b) Non-directional relays at both the ends c) Directional relays at the source end and non-directional at the load end d) Directi