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Electrical Engineering Interview Questions

What the difference between ac and dc inductor an capacitor

1276

We normally make oil soak pits under Transformers. Oil from soak pit goes to collection pit. We provide granules/pebbles under transformers. My question is weather granules/ pebbles to be filled in soak pit or not? if yes upto what level?

Bhel,

8596

why two point starter,three point starter, four point starter cannot be used for A.C machines?

2857

How many types of DC current

2577

What is sinusodial & non sinsodial current

2033

What is earth?

CLG,

1311

why we use crushed stone in switch yard?

3434

why we use salt for earthing?

1429

why we take transformer reading in kva

3867

Why the transformers are rated in KVA. ? in new view.

3947

2612

Which of the following loss varies with the load A hystresis loss B eddy current loss C copper loss D core loss

2427

In auto transformer if power transferred inductively and conductively are same, the ratio of output/input voltage is A 1 B 0.7 C 0.5 D none of above

7991

kVA rating of open delta connected transformer is _____% kVA rating of delta/delta connection A 50 B 70.7 C 57.7 D 75.7

2987

Scott connection is used for A 3-phase to 2-phase conversion B to achieve higher effciency C to save copper D to reduce harmonics

1424

Un-Answered Questions { Electrical Engineering }

How many types of losses occur in a transformer?

151

I WANT BHEL PREVIOUS QUESTION

1343

If we have use two power cable for incomer, that time how many use cbct for earth leakage protection? 1 or 2 if 1 way? If 2 way?

1146

induction 3 phase motor terminal connection

1577

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1141

What should be the voltage between Neutral and Ground in secondary side of the step down transformer (230 V to 110 V) with no load condition?

1147

How a capacitor discharge weld power supply works? what is the use of a pulse transformer?

1119

Why can't we take NO LOAD TRIAL of motors having V1 mounting??

1047

can anybody send me syllabus of rrb section engg (electrical). and also send previous question pepar...

1067

145

hi friends this is a newcomer in your community of enthusiastic peoples. i am preparing for SSC (CPWD JUNIOE ENGG EXAM FOR ELECTRICAL) pls guide me on the same how to crack it? PLS LET ME KNOW IS ANYONE THERE WHO PASED IT? CAN I GET THE QUESTION PAPERS OF PREVIOUS EXAMINATIONS?

1316

why do we carry out winding resistance test?

1335

Minimum IR value of 1.1 kv grade 3.5c (300, 240,185,150,120,95,70,50,35,25) sqmm Aluminium XLPE cable and 4c (16, 10,6 & 4) sqmm cu arm cable between RY,YB,BR,RN,YN,BN,RE,YE,BE & NE.

2274

What is touch potential and step potential?

1167

WHY MOSTLY Rph IS USED FOR CONTROL CIRCUITS AUX. SUPPLY ?

1533