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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What are the special cables required for explosion proof wiring?

 2775

Can we use generator transformer as step down transformer? How?

 3 3786

what are the parameters plays a major role in Potential transformer Burden calculation??

ABB,

1438

Whay you want to change your job.

 1 2618

EXPLAIN WORKING PRINCIPLE OF ALTERNATOR & MOTORS.

L&T,

2 10169

What is the latest generation of circuit breakers called?

Focus, Oil India,

2 7497

In case you don't have coal and salt for earthing, how can you achieve good temporary earthing?

Focus Energy, NHPC, ONGC,

1 20463

1 hp single phase motor is more likely to get hot thsn inone hp 3 phase motor its true or false? If true why?

TVS,

1 3700

Why we are using Isolation Power Transformer inplace of commercial power transformer? What's the difference between them?

UPCL,

1357

In our plant we are having 6.6 v motor wih MV drive running frm last two years.udenly at some speed motor getting vey vibrations what is the problem

ITC Infotech,

2 3021

1)How much current can a 3-1/2 core 100 mm wire carry? 2)What are the special cables required for explosion proof wiring? 3)In case you do not have coal and salt for earthing, how can you achieve good temporary earthing? 4)One horse power single phase motor is more likely to get hot than a one horse power 3 phase motor. Is it true or false, if true why? 5)What are the different types of soft starters for large motors?please explain?

TATA,

4007

what is different between relay and plc?

 3 3574

what is REF relay?

 1 2937

what is pilot wire protection? wer is it using?

 1 2803

what is current check gurd relay?

MRF,

1743

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Un-Answered Questions { Electrical Engineering }

What is the typical enclosure type used for Indoor switchgear / Outdoor switchgear Units? - In Onshore / offshore Units?

344

Give the topology of current amplifier with current shunt feedback?

512

How to calculate the sag on transmission Lines.

2212

State kirchoff voltage law?

489

Why GRR starts from 60% of motor speed why not less than 60%?

267




Usually in the L & T make MCC feeders' power circuit,we have BMR after the MAIN CONTACTOR.,can we interchange their position, keeping the control logic same???

1461

What is the difference between Droop vs Isoch Control?

1674

How impulse levels are calculated that for 11kV impulse is 75kvp, for 24kV impulse is 125kvp ?

1278

how much allowable resistance that can be difference in motor all coils?

1648

What is the function of NGR for the parallel operation of alternator? whats happen when different rating of alternator are running with parallel?

2232

What is the function of attenuator in cro?

508

what is the differencce inn series and cascade connection??

3974

technically, what is the reason behind starting the motor star the delta connection .. and what other ways to do this rather than using " star-delta transformer"

1391

what is the advantages og idmt relay over magnetic relay??

3498

What is pole of the system?

498

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