CL wadhwa bits solutions (15 - 21)

Lesson 4 of 21 • 53 upvotes • 15:00mins

Anvesh Sameer

15. The per cent bias for a generator protection lies between: (a) 5 to 10 (b) 10 to 15 (c) 15 to 20 (d) None of the above. 16. 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) Directional relays at both the ends. 17. The number of pilot wires required for protecting 3-phase transmission lines using Translay system of protection is: (a) 6 (b) 4 (c) 3 (d) 2. 18. A shunt fault is characterized by: (a) Increase in current, frequency and p.f. (b) Increase in current reduction in frequency and p.f. (c) Increase in current and frequency but reduction in p.f. (d) None of the above. 19. For measuring positive, negative and zero sequence voltages in a system, the reference is taken as: (a) Neutral of the system only (b) Ground only (c) For zero sequence neutral and for positive and negative the ground (d) None of the above. 20. The most economic load on an overhead line is: (a) Greater than the natural load (b) Less than the natural load (c) Equal to the natural load (d) None of the above is necessary. 21. The most economic load on an underground cable is: (a) Greater than its surge loading (b) Less than the surge loading (c) Equal to the surge loading (d) None of the above is necessary.