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Electrical Engineering Interview Questions
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how we test a 3 phase motor on single phase supply....? HOW WE RUN A 3 PHASE MOTOR ON SNIGLE PHASE. supply for testing..? how we verify of a 3 phase motors 6 wire & name thame a1/a2/a3..b1/b2/b3 and c1/c2/c3 for connecting star delta starter ........i have only 1 phase supply ? help forum..........

Enercon,

1 4402

why hv winding is not placed near to transformer core

 4 23957

How can calculate the daily electrical consumption of 7.5 HP motor, if the moter runs 24 hrs continiously. Also have to know about 3.5 hp chiller.

Wipro,

1705

my N-P 230 VAC at 3 wires but i haven't any voltages at phase to phase whither my supply is 3 phase, why i haven't received these line to line voltages ?

 2 3129

what is the first step of dg shycroning ?

ABB,

2 4091

what is power factor?

MAHINDRA,

9 9320

how we can check that any motor is faulty may be single phase or three phase?

MAHINDRA,

2 7946

we touch other end of the tester supply, why do not get shock?

L&T,

7 13132

what is tha gap between the pole of 132kv line

2 4778

What sort of protection scheme do you suggest for the protection of a 10 HP motor?

Chevron,

1 7413

Why the capacitor bank is keeping on for electricity supply and keeping it off for generator supply

 3 4969

what is the primary current in 415/415 v when secondry of dry type transformer is shorted.?

 3 5344

What are the conditions to be satisfied before connecting two DC generators in parallel?

Bhel, Godrej,

9 14860

how to calculate the conductor size for certain KV transmission line and distribution line?

Hyundai,

2001

What is the difference between earthed & unearthed system?

HCL,

2 5138

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Un-Answered Questions { Electrical Engineering }

what is a pulse transformer? how rise time of pulse changes when ever the voltage changes?

1473

The inventer is a battery, but if lost current at home u will turn on the fan but the is AC and inventer battery is dc . Then how the fan was rotating. What device Or machine in fan converst the Dc power to Ac power

594

what is the standard values(Megger test) of resistances between L&N,L&E and N&E for a system on IEE regulations?

1645

WHAT IS SITTING AMPS IN OVER-LOAD RELAY FOR 1PH OR 3PH MOTORS?IF ITS NAME PLATE GIVEN MAX AMPS 10AMPS?

1326

Explain in details how you would react to an unexpected incident when your supervisor or manager is not around to give instructions?

7300




Write the force balance equation of m ideal mass element.

701

what do u understand about FACTS? how they are useful?

1522

explain with diagram how to protect transformers and substations from over current with help of CT's?

1492

Is there any standard guidelines/Criteria to design NGR/NGT.?

2355

What is reactive power and where it is used.

1181

We have 250 KW x 2 motors, which are load from 25% to 100% varying load in every minute , so how can we compansate the power factor. pl give your opinions on the above subject.

1411

For a three phase induction motor, what will be the effect on motor if the neutral of the system is shifted to say 20 deg.?

1390

What happens when two positively charged material is placed together?

687

what is the need of starter in tube light and what type of starter is used in that?

1507

In parallel operation time both NGR’s close or not close if both close what will happen

3266

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