what is model question rrb junior engineer electrical gr.II

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What is the function of the serge absorber?

5 Answers  

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why there is a phase difference between line voltage & phase voltage ?

4 Answers  

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If a fan get trip and run in reverse direction due to system flow. Now in this condition during starting how can a VFD bring this negative speed to zero and later run in forward direction?

2 Answers   Aditya Birla, Siemens,

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For a Potential Transformer(PT), the primary neutral terminal must be grounded before energization. Why....? What will be heppend if we energize the PT without grounded the primary neutral point? Why..........?

2 Answers  

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why dont we connect the two 12 V DC batteries in parallel, for an inverter (UPS)? is there any harm ?

3 Answers  

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Why Water motor is not taking a load or pressure while everything is correct. (Note: Motor running properly)

0 Answers  

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How much current can carry the 1 sq inch super enamelled copper wire?

4 Answers  

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what type questions asked in hp cl

0 Answers   HPCL,

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Why are iron cores in transformers made laminated?

0 Answers  

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What is the GI Earth Flat Size recomended for 33KV 2000KVA Distribution Transformer

1 Answers  

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1.difference between sts & ats? 2.what is fm200 system brefly explain?

1 Answers   Ericsson,

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