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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

why AC voltage source are generate as 50 Hz ?

4 6433

What will happen if induction motor is supplied with capacitive load?

NTPC,

1 5303

how we identify between current transformer and potential transformer without having it name plate?

L&T, TATA,

5 12638

Please give the formula for converting from 1 tr refrigeration to kw.

Bugema University,

2 4541

what is settable hystersis protection? If any body knows plz kindly post the answer..

2008

what is the formula for computing cable tray size & capacity

2121

what clearance required for 4.5 mva dry type transformer?

SPS,

1982

how to calculate lighting for a room

Coca Cola,

2 7603

How can we select suitable capacity generator for three phase load (inductive load) and how to take study analysis in 3 three phase load system ?

2106

A group of machines (wind turbines) connected with 33KV feeder and each machines are having individual VCB. The 33KV feeder connected with 110KV/33KV substation. The 33KV feeder tripped by over current at Substation and fault recorded at Substation as OC-R&Y phase. Same time the group of machines VCB tripped by over voltage, the fault recorded voltage was above 66KV by numerical Under/Over voltage relay. While grid drop time, this much of voltage hike is possible?

1 3344

method to check earthing

ECC,

5 11660

why slipring motor , at full speed run as squirrel cage motor?

1 4086

I have running 4 generator in paralel.All generators Voltages is same(470 V),KW also same (100 KW) but only No2 generator Amper is high than another generators. DG No:1,3,4 470V,100KW, 150 A DG No:2 470V,100KW,400 A

4 5447

What is the permissible value of earth resistance and as per which standard / act / rule ?

HBL Power Systems,

3 6971

The loads are connected with phase and ground then why current flow as the loads ?

1921

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Un-Answered Questions { Electrical Engineering }

Define steady state error.

1040

What are reasond for high wattage in single phase induction motors

1842

what would u consider to be the basic purchase order information you would need to proceed with a cable inspection assignment?

1870

How to know of any cable size if there are not written on cabl?

1865

Difference between On Line capacitor and Station Type capacitor.

2005

A 3-PHASE TRANSFORMER IS USED TO STEP-DOWN THE VOLTAGE OF A 3-PHASE, 11KV FEEDER LINE. PER-PHASE TURNS RATIO IS 12.FOR A PRIMARY LINE CURRENT OF 20A, CALCULATE THE SECOUNDRY LINE VOLTAGE, LINE CURRENT AND OUTPUT KVA FOR FOLLOWING.A)STAR- DELTA.B)DELTA-DELTA.

3002

Classify milling machines.

1087

why we are not giving the zone 1 trip command to the master trip relay

1705

what is the meaning of 0.5ohm Resistance

1816

how to calculate transformer turn primary & secondary side 11kv to 420v

2155

describe the fully control circuit diagram of ac drives

1798

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

1411

Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?

1735

design of IGBT firing circuit for 11KV

2590

Why does inductive loads consume KVARs?

2017

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