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Electrical Engineering Interview Questions
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is power factor correction related with vector group of transformer i.e:Dyn11?

1 3180

why the the electrical machine coil are damage ? How to prevent it?

 2 3518

in wind mill use 2100 kw asychronous generator ( induction generator ) rotor voltage : 3300,stator voltage : 690, rpm : 1511 type : MRL063E04 ' we check rotor resistance magger value found following. R-EARTH - 00 M.OHM,Y-EARTH-34 M.OHM,B-EARTH- 33M.OHM R-Y: 31 M.OHM, Y-B: 00 M.OHM,B-R :33 M.OHM HOW CAN I TAKE DECISION?pls ans. quickly

Shaifali Rolls,

1871

A 12.5 hp slip ring motor taking high initial current and its MPCB is getting open.what may be the reason?

 3 4111

What should the transformer connection of a 11/220 kV step up and 66/11 kV step down transformer ?

CGL,

4 6467

What is the function of the circuit breaker failure relay?

 1888

What is the function of the auto reclosure relay?

 1 4200

in transformer star connection with neutral are shorted. is there is any effect.

 1 2703

for a machine R=130 KVA Y=132 KVA B=144 KVA Then what will be the total kva

ABB,

3 5244

why insulators are colured in brown only?

Transco,

3 5323

How does solar power system work?

 1 3148

what is mean by NPS (Negative phase sequence)fault? what is the difference between EFR & OCR faults?

TNEB Tamil Nadu Electricity Board, Vestas,

1766

What is the criteria in selecting Air circuit breaker(ACB) & Moulded case circuit breaker(MCCB) for a particular range?

DLF,

3 7019

Does the ELCB or RCCB trip when it is connected to a primary side of a welding transformer?

Tata Motors,

3 8478

how much power consumed by 1.5 ton capacity split A.C in 1 hour

2 3431

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Un-Answered Questions { Electrical Engineering }

what is the correct method for the outdoor termination of 19/33 KV HT cable step by step?

1621

What is the difference between shortcircuit current, rated current of cable & MCB with example? What will be the size of cable required for 5.5 KW motor (Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.

1575

What are the main advantages of generalized error co-efficients?

637

Atwhat condition reverse power relay will act?

1791

why it is not advisable to run low rating (19KVA) DG sets in parallel for long durations even though they are provided with droop ckts (QDC)

1462




Safety of dry type transformer

1475

Define active filter?

587

what is the difference between electrical choke and electronic choke?

2082

State and define norton’s theorem?

770

what does a string of resistors in a series will do?

731

what is the acceptable limit value for Desolve Gas Analysis/

1427

how flow current in 220 kv line to line

1533

standard earthing rating for power line..

1658

Define phase cross over?

654

Explain different types of d.c motors? Give their applications

638

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