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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

What is depreciation factor?

HCC,

2268

what sis the testing procedure of transformer and ht panel?

1 3840

what is the formula for converting dc power(watt) to ac power (watt)?

ABB,

3 9604

why ohmas low not sutable to transformer.

1 5024

why indicated sypply only by 440V in 3-phase system.

2 5144

What information we need to prepare relay coordination chart

2341

1.What is the difference between isolators and circuitbreakers? 2.What is bus-bar?

1 5038

why the vector group of excitation transformer is YD5(150 deg)how is this factor decided.

1 8637

1.Is there any difference between terminologies,HT-HV <- LV? 2.What is the highest transmission voltage level in india?

5 16363

1.two coupled coils with L1=L2=0.6 H have a coupling coefficient of k=0.8 the turns ratio N1/N2 is......

BSNL, SSC,

5 32323

2. A current i=(10+10 sin t)amperes is passed through MI type ammeter. its reading will be.........

SSC,

2321

3.The slip of an IM UNDER FL condition is about.....

SSC,

1 4015

4.In which type of welding is a pool of molten metal used.....

ISRO, SSC, Vizag Steel,

3 21998

5.WHICH TYPE WELDING PROCESSES USES NON CONSUMABLE ELECTRODE.........

SSC,

2091

6. A DC AMMETER HAS R=0.1 OHM & CURRENT RANGE IS 0-100 A IF THE RANGE IS TO BE EXTENDED TO 0-500 A THEN METER REQUIRES SHUNT RESISTANCE OF ..........

SSC,

2 6702

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Un-Answered Questions { Electrical Engineering }

what does vector group Dyn11 tell us? also tell me how will u differentiate between phase lead and phase lag thru this vector group

2080

what is the difference between oil surge relay and buchholz relay.

7036

How to do cable sizing calculation for 750 A Neutral Earthing resistor for 33kv. the 33kv cable going to swbd. is 630mm2 3 runs.

4772

Parts of machine and their discription in details with suitable photo

2061

After doubling voltage from solar cells & use step down voltage transformer can we get high current output with low voltage.

1980

HOW TO REDUCE POWER PLANT AUXILIARY POWER CONSUMPTION?

3416

What is the need of earthing transformer for delta side of a transformer. (Think of a line section between a star/delta transformer at a grid substation and delta/star transformer at a village. An earthing transformer is there at the delta side of the star/delta transformer at grid substation). As there are no ground reference there will not be fault current if a one phase is grounded. Further L-L phase will be sensed by the primary side of star/delta transformer as a L-G fault. So why an earthing transformer is required at delta side

1453

What is the meaning of dedicated earthing?

2169

A car's starter motor draws a current of 100 A at 12,0 V when starting the engine. The mechanical power required to turn the engine is 960 W. At what rate is energy from the battery converted to non-mechanical forms of energy?

2168

what is formula for zero phase sequence of nuetal earthing transformer of 6.6 kv

2290

What are the causes of having an rmu explode after installation? And how do u treat the bushings of an rmu?

2521

how to calculate the surge level of surge suppressors related to the SF6 cicuit breakers?

1971

Why increase in current leads to increase in conductor temperature?

1141

What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?

2009

1.what is difference in maintain Hz again Hz in USA ? 2.how to calculate the battery AH? 3.why are yearly maintained in transformer how many tests in required?

2779

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