CAN U PLEASE TELL ME SOME G.D TOPICS FOR APGENCO INTERVIEW&G.D

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Differnce between Analog & Digital

1 Answers  

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What is the most accurate way of testing ELCB?ELCB is better than RCD?

0 Answers   GECO,

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The potential difference between a phase and neutral is 230v , but the potential difference between two phases is 400v. why?

4 Answers   HCL,

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Why we get neutral from EB department, if not what will happen if we use earth instead of neutral? what is the result at the time of monsoon or rain with thunder and lighting ?

1 Answers  

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What is the type of earth fault protection used in battery? explain.

0 Answers   PSEB,

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What is the meter used to check the DG sound level.and pollution check

2 Answers  

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If auto trip is operated, can you close the breaker.

2 Answers   KSEB, L&T, Siemens,

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What is the minimum value required for Neutral to Earth in UPS Panels

3 Answers  

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Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

0 Answers   Pride Hotels,

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how we can calculate power factor without knowing current in 230v 100w load ?

10 Answers  

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if 12v battery get discharged for 2 months after if we put charge it will charge again?how much time it will take to charge?

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