Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Difference between online and offline UPS?

11 27052

How to calculate earth flat size for 250 Kva DG and transformer?

Deepak Fertilisers,

8 36384

can we use HPSV LAMP in HPMV LAMP fixture ?and viseversa.

OPS,

5 13729

Why motor initial starting current is high?

Pennar,

9 63480

megger generates D.C. voltage while earth tester generates A.C.voltage is it true? I know for megger it is D.C generator but what about earth tester?

IOCL,

4 25682

What is the cause for a blown fuse in one phase of primery side(HV) of a three phase transformer( 4169v-460v) in the time of closing its supply breaker. There is no load on the secondery side of the transformer in this moment.

Novachem,

3 13421

iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation.

2255

What is mean by Sub Synchronous Resonance(SSR)???

1 4599

Will sag depends on the Specific Resistance of the conductor?if not Why??????????

BARC,

2 5507

how to calculate the neautral earthing conductor size for a 500kva dg set.

2 12275

What are the implications when the power factor is is leading condition ?

1 3280

What is double delta conection in AC Motor? And can we done the double RPM of the motor by double delta conection?

vguard,

1 12934

How to control speed of DC motor with AC power?

vguard,

7 13545

why transformer is giving some humming noise .....?

Electrotherm, JSW,

11 31459

when the rheostat kept in minimum to maximum position in motors what will happen?

7 18476

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Un-Answered Questions { Electrical Engineering }

in dc shunt motor if field winding is shorted then

1841

what is difference between isolation and ultra isolation transformer?, what is the method of testing ?

4331

On a 3 winding transformer YNynd11, how do you apply REF protection to the Delta tertiary winding that is supplying auxiliaries to a substation?

4374

what is lrs tank water resistance.

2544

A power transformer 4MVA/11KV/0.415Kv has been out of use in 12years. what maintenance actions/test need to be carried out before energizing.

1316

how we sesign the transformer give some specifion regarding design of transformers

1928

Differentiate between induced emf and self inductance?

1150

how to measure dc earth leakage current?

3175

What is T’Q and X’Q and X’D ? and what is saturated as well as unsaturated ?

1785

Why IR value of the (HT cable Plus synchronous motor) is less while individually having IR values in GΩ?

1802

why is the power generator connected as star earthed or star earthed through reactance and what its features ?

1681

WHAT IS THE FAULT WHEN 100HP TURBINE MOTOR TRIPS, LIST THE FAULTS AND ITS TRABULESHOOTING TIPS.. MY AUTO TARNSFORMER STARTER TRIPS

2090

How to setting the volume of RTCC panel AVR (11kv) controller

1593

why 3 phase is converted into 2 phase using electronics circuit why not 2 phases are diresctly putted from the 3 phase transformer??

2187

what is self capacitance of inductor

2425

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