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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

Please tell me the formulaes while designing a substation for power Calculations in designing a 33 KV Substation?????

1816

generally rectifying of ac tells. ac signel appear at phase and neutral with respect to frequency by -veand +cycles. but we doesn't experience shock with neutral in house hold ac??????.

ETA, RRR, TCS,

1 4801

Tell me about Simence PLC 'BLOCK'.How many types and what for.

Gurit,

1 4184

Define over current & earth fault ?how its functioning ?

1 3706

how can we choose the size of road crossing pipe for power cables

DLF,

2 4089

what is the installation process for lifts

DLF,

2316

is it necessary for 200 kva transformer to have marshaling box and cu plate earthing for neutral

Blue Star,

1 2849

redundant connection in contactor?

Emerson,

2501

why effective resistance should be more than static resistance in transmission line?

2100

what is the difference between EMF and potential difference??

3 5334

how many testing use in power transformer?tell equipment names?

ABB, Electrical,

2 5860

in basic 2 phase will short means tripping the power but spot welding 2 phase shorting but not tripping it will welded why.....(Q)

1948

3 phase Motor will be given 2 phase after 2 to 5 second we given 3rd phase so Motor Run sum-time in forward or sum time run reverse direction. All time phase sequence is not change. Why motor run in reverse direction? Please Explain........

1959

why using earth testing rod 15 meter 30 meter long to each other?

1 3637

1 unit or 1 kwh means how much kva

TATA,

7 23636

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Un-Answered Questions { Electrical Engineering }

HOW TO CALCULATE ELECTRICAL, MECHANICAL,& OVERALL EFICIENCY OF GAS ENGINE POWER PLANT

2004

If a high resistance fault occurs,then what are the changes will happen in the system?

1457

How much load can be taken for chiller from 1500 kva transformer

1275

3Cx240 & 3Cx300 sqmm Al. cable from lv side. What is the calculation for this cable??

1400

star delta starter contorl circuit... drawing..

2082

What is conventional thermal current (Ith)

4439

What are the significant parts of dc generator?

1138

What is warm / cold start of HT motors. How many warm start & cold start are possible in a day?

2055

USE OF 8 WAY PAN ASSEMBLY

1956

what is the reason the main breaker is trip during the motor is running? (some time the breaker is not trip)

1784

I am using submission of two ct in one and half scheme for 67/67N protection. Both CTs star point is grounded separately near ct box.Will two point ground give wrong tripping to 67/67N during fault or no matter.

2110

i have flexible wire. size of conductors is 0.190 mm & no.of conductors are 48. then size of wire comes 1.37 sqmm instead of 1.5 sqmm . the what is tolerance for this size.

1790

explain why core loss of a transformer is almost constant under different load conditions when connected across a constant voltage and constant frequency.

2694

1 Ton is equal to how many watts?

1099

What is use of starter and choke in tube light

1770

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