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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

when a cunductor is being disconnected from live cct, still it showing charged, if its checked by line tester?

GEB,

8 5752

WHY CFL can't made in shape of bulb.

5 6393

why three phase system is not preferred in aircrafts power cckts if yes than explain reasons?

3 3815

wat is the role of reactive power in power generation?why we have maintain it.

3 8055

wat is the importance of reactive power in power generation.....if it is zero means wat will happen to system........

Bhel, Jindal,

22 31972

what is difference between differential protection and distance protection and how we calculate the sloop?

OPS, Power Grid,

5 37880

what is slip resistance? how much its value in 110 kw motor? why voltage is varied in vvvf drive ?

Reliance,

1 3274

What type of protective system we uses in L.V. distribution panels?

6 5980

Why P.f. of the system decreases when it is connectect across induction motor? & how to maintain the p.f. of system to unity.?

Reliance,

6 6934

What do you mean by S.F.U. unit? application of it.

Indo Asian,

16 92759

what is green house effect?

4 3948

what do u mean by knee point voltage?

TATA,

7 12317

what is negative,positive abd zero sequence current explain clearly

Jindal,

1 7186

what happens when ac supply is given to D.C motor.

17 24042

what is purpose of using reactor in substations.

Heavy Engineering Corporation Ltd HECL,

20 98087


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Un-Answered Questions { Electrical Engineering }

WHERE NEUTRAL WIRE IS CONNECTED AT DOMESTIC TO TRANSMISSION LINE(SINGLE PHASE TO THREE PHASE)

917


How the circuit breaker is selected for Induction motor of 100 kW, 415 volt, 0.85 power factor, 0.95 efficiency ?

784


what is earthing.how we make it,describe briefly.

1523


Differentiate between real and apparent power?

184


For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

1139






Explain the method to keep noises low in a control system?

208


How you calculate the repturing capacity of a HRC fuse

1636


Define unilateral circuit?

190


How Diesel Generator start ?

1466


What is the difference between electronic regulator and ordinary electrical rheostat regulator for fans?

212


How to decide no. of Step and Kvar for APFC Panel 40 kvar MD: 33.12 KVA Avg pf : 0.8540

237


Can any body tell me the different types of LT cables & their application.

1157


what is rocking arrangement in arc heating

1239


at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.

747


how unidirectional torque is produced in DC motor?

5721