Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Why the TNC switch is called as Memory switch

Reliance,

1 3292

how to understand the controling circuits example star- delta-starter controling daigram please let me know

GMR,

3 7180

how many earthing should give for transformer body and nuetral

GMR, GOMS,

5 7739

i am electrical and elctronics engg passed out in 2009 want to attend for reliance placements.plz send me apttitude ,technical and hr question answers to my mail plz. my mail id-kat.bindas@gmail.com

1533

Is C.T will sense the current in both direction. As i know the C.T will sense the current in only one direction.

2 4948

What is the diffrence (Technical & Construction ) between CBCT & Normal CT?

1523

Why the cost of CT increases with the decreasing of its CT Ratio (Technical Reason)?

Vedanta,

2 4985

How the size of transformer decreases if we increases the frequency?

2 4450

Can we use delta-star neutral grounded 3 phase power transformer bi-directionally.

GMR,

2 4561

how to synchronize 3 phase slip ring induction motors of different ratings.

GMR,

1759

can we use existing delta star with neutral grounded,step down(6.6kV/415V), 3 phase power transformer bi-directionally.

GMR,

3 4947

1.differance between onload ups and off line ups.

CTS,

1 5008

want happens when a dc is given to a commutator

2 3860

A three phase transformer 460v primary 220v secondary (three phase four wire system.) Why did we get 460 volts across the neutral on the secondary side?

3 5569

I have 12MW gas engine based power plant its running parallel with grid. my problem is When cpp run in island mode(without geb) that time geb transformer power factor is 0.2 lagging. When cpp run with parallel that time power factor is 0.94 lagging So how can i maintain power factor ofgeb transformer in island mode 0.9 lagging?

SPCL,

1 2035


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Un-Answered Questions { Electrical Engineering }

my UPS suddenly goes off and all panel light also blow off.This happens even main electric supply is not interrupted.After some time it automatically starts functioning normally.Batteries are new.

1533


Earth leakage relay basic knowledge principle

1714


How many lightning arrestors to be installed on 50MX60MX10M building and is there any formular for that?

1452


what is high and low cut off voltage of BB and DG at SPS????????

983


Why generation voltage in thermal power plant is between 11kv to 33kv?

600






1sq mm dc powr cable can carry how much dc currnt

1457


why the NGR (neutral grounding resistor) always OFF during DG off?

3053


Form S and "c" license application both are same? @ tneb portal

1233


How many size of cable required for a 300m long and 30kw inductive lode

881


WHAT IS THE FORMULA FOR CALCULATING CURRENT RATING(DIRECT IN GROUND OR AIR) OF ARMOURED(XLPE) CABLE OF 4C,16Sqmm?

1625


In DC generator, we use commutator, having no. of segments. Then how it is possible to get a half wave of voltage and current for half rotation of armature?

1458


What are the disadvantages of hydropower?

628


in general it is observed in power stations, the tertiary winding is used in higher rating Y-Y auto transformer but not in Y-Y power transformer. is the tertiary winding is compulsory then why it is not using in power transformer 

1269


What is the instrument to check the rotating diode fuse of alternator in running conditions?

1974


Maintenance of transformer???

1779