Electrical Engineering : Switchgear Protections QUESTIONS AND ANSWERS :: part3 : 16 to 20
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
16.The single phasing relays are used for the protection of |
| single phase motors only |
| two phase motors only |
| two single phase motors running in parallel |
| three phase motors |
17.Series reactors should have |
| low resistance |
| high resistance |
| low impedance |
| high impedance |
18.For cost and safety, the outdoor substa tions are installed for voltages above |
| 11 kV |
| 33 kV |
| 60kV |
| 110kV |
19.For which of the following ratings of the transformer differential protection is recommended ? |
| above 30 kVA. |
| equal to and above 5 MVA |
| equal to and above 25 MVA |
| none of the above |
20.A _______ is used to measure the stator % winding temperature of the generator. |
| thermocouple |
| pyrometer |
| resistance thermometer |
| thermometer |
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