Electrical Engineering Questions And Answers :: Switchgear Protections: part3



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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