Transmission And Distribution Set 3

20-30 ohms ✘ 70-80 ohms ✘ 100-200 ohms ✘ 500-1000 ohms ✔

Radial system ✘ Tree system ✘ Ring main system ✘ All are equally reliable ✔

Underground ✘ Overhead ✘ Either of the above ✘ None of the above ✔

Dry weather ✘ Winter ✘ Summer heat ✘ Humid weather ✔

Using a guard ring ✘ Grading the insulator ✘ Using long cross arm ✘ Any of the above ✔

Lead ✘ Rubber ✘ Copper ✘ Iron ✔

Circuit breakers ✘ Isolators ✘ Load break switch ✘ Circuit breakers and load break switches ✔

Inductors ✘ Capacitors ✘ Synchronous motors ✘ All of above ✔

6.6 kV ✘ 11 kV ✘ 33 kV ✘ 66 kV ✔

Permeability variation ✘ Corona ✘ Skin effect ✘ Unsymmetrical fault ✔