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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

can we synchronize star system generators with delta system generators?

2060

can we synchronize star system generators with delta system transmission line ? and how ?

2846

Can we convert off line transformer to on line transformer

NHPC,

1984

Can we convert off load tap changer transformer to on load tap changer transformer

2 6768

why two fuses are used in battery charging room?one in positive line and the other in negative line?do any DC system require two fuses?

HPCL,

1 4535

how many test is necessary for 27mva transformer.

HEG,

3 7088

Why we use series reactor in power system?

Cadbury, HEG, Uttam,

9 23767

How u can give the overload setting to any motor protection relay for a HT motors with formula and Example?

OCL,

2192

What is differential relay? How it operates?

1 5279

. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?

2156

What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?

1995

While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply

2 8701

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

2010

Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example?

2228

Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient?

1 4297

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Un-Answered Questions { Electrical Engineering }

1.What is captive power plant? 2.What is national grid?Give brief idea.

2155

Is potential difference materials property ..? if yes tnen how.. explain brifly.

2056

how can calculate resistance box for 15 kw, 6 pole, RV-230, RA-42 motor

3336

Is it possible to measure the voltage of a battery from a single terminal?

1737

How to size Air Circuit breaker (ACB)? What is the most important factors?

2260

salam&hi, i need to know about how can i calculate an enough current for the new building before i submit it to the suppliers

2085

How does PLC work for sychronising of Two or more DG sets?

2076

In EB metering we face problem kva jump even in no load condition.can any one help to control this

1835

Why do we avoid electrical conduits in floors at apartments?

2078

Define bibo stability.

1077

Sir,In our company there are 3 caterpillar make(capacity:(1) 3.3KV,2.5MW(2)3.3KV,2.5MW & (3)3.3KV,1.9MW) & 1 deutz make (capacity:11KV,3.8MW)gas engines utilised,all are running in paralell. There are three transformer utilised,(1) 6.25MVA,3.3KV/22KV,Impedence voltage:6.7% used for two generator,both are 2.5MW(2)5.5MVA,3.3KV/22KV,Impedence voltage:7.2% used for one generator of 2.5MW & (3) 5.5MVA,11KV/22KV,Impedence voltage:7.8% used for one generator of 2.5MW.all generator breakers capacity of 1250Amps. Sir,I want the details of fault level calculation of generator,transformer individually & for whole system. If you require any information from me.feel free for contact me sir.pl.send the answer of my question as the earliest as possible.

2130

Why use the vcb at high transmission system ? Why can’t use acb?

1324

is it possible to turn on the single phase star delta on delay timer using 24 v dc ?

2051

how to modify DOL control panel into Delta Y connection?

1951

Please clarify 1. Icw: rated short circuit working withstand capacity 2. Icu: Rated ultimate breaking capacity 3. Ics: Rated service short circut withstand capacity 4. other specification of ACB

2736

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