Switchgear Protections Set 2

fault occurs on the bus itself ✘ fault occurs on neutral line ✘ two or more faults occur simultaneously ✘ fault occurs with respect to earthing ✔

two currents ✘ two voltages ✘ two or more similar electrical quantities ✘ none of the above ✔

interrupting an electrical circuit ✘ switching an electrical circuit 111 ✘ switching and controlling an electrical circuit ✘ switching, controlling and protecting the electrical circuit and equipment ✔

Time-delay trip ✘ Inverse time trip ✘ Shunt trip ✘ All of the above ✔

thermocouple ✘ pyrometer ✘ resistance thermometer ✘ thermometer ✔

low resistance ✘ high resistance ✘ low impedance ✘ high impedance ✔

1 mega ohms ✘ 10 mega ohms ✘ 100 mega ohms ✘ 500 mega ohms ✔

good selectivity and reliability ✘ economy and simplicity ✘ high speed and selectivity ✘ all of the above ✔

split-phase relays ✘ reactance relays ✘ impedance relays ✘ none of the above ✔

Generators ✘ Motors ✘ Transmission line ✘ Transformers ✔