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 |
More Switchgear Protections QUESTIONS AND ANSWERS available in next pages
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