Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what phase and neutral.

HP,

3 3651

why used in starter in tube ligtht circuit.

HP, College School Exams Tests,

4 5454

Why used in layer by layer charcoal and salt used in earth pits.

CESC, HP,

10 53602




1. how much normal earth resistance in earth pits(neutral and body earth) and transformer neutral and body earth & panel earth.

HP, Malladi Drugs and Pharmaceuticals, Pearl Engineering, PL,

12 82000

how much UPS neutral erath leakage current.

HP,

2199

Two 11 kv lines are feeding to common bus in a substation,I have one set of CT & PT(3ct,2pt), How can I measure both lines power using single set.

L&T,

6 6918

How do determine the Size of a Droop Current Transfomer for Paralleling of Two Generators, Say I need a Droop Current transformer for a 600 kW generator need to be parallel with a 800 kW generator, etc.

PNG Power, JK Cement, MPPGCL Madhya Pradesh Power Generating Company Ltd,

2 7207

I have installed capacitor bank at secondary transformer. cos phi is increase. but on load (far from transormer), it still poor. Can anybody explain it??

6 8106




What happen if LV supply is fed to a HT motor?

Jindal, ITC Infotech,

19 27176

What type of DC Generator is used for Arc Welding purposes?

Rubicon, CPCL,

7 26272

Wat wil happen if Transformer is operated at 100 HZ Frequency?

8 13430

What is the amount of no load current of 630 kVA tranformer voltage ratio 11kV/440V ?

13 14091

what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.

773

when we connect a CT in the line will there be any loses in the line due to the mutual inductance of the CT.

1 1788

What is the difference between short circuit and overload currents?

IIIT,

14 48632


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Un-Answered Questions { Electrical Engineering }

2- What are the percentages between excitation currents in phase (R, S and T) in ∆ and Ỵ connections in excitation Current test in transformers?

733


What would cause a 240v choke that should give 110v out on a 16w lamp to gradually increase to 160v?

845


how does the thyistor work in dc drive?

697


Dear sir, In our plant have Station Transformer having capacity,i want to know, why LV side 40 - 40MVA is given? & how we can get 6.3 KV supply from tertiary(i.e. Open delta connection), Vector Group YNyn0 - yn0 +d MVA Rating 80MVA / 40 - 40MVA + 26.7MVA Voltage rating 420 (Tap range +6,to -10)81.25% /11.5KV - 11.5KV +6.3KV

808


What is the purpose of using busbar mounting fuse?

799






can the measured percentage error during calibration of single phase energy meter be negative?

579


As i want some model question paper in basic computer science and history please send me immediately sir

651


What is the physical significant of power factor?

577


WHAT KIND OF LIGHTENING PROTECTION SCHEMS CAN BE ADOPTED FOR THE FLAT ROOF OF BIG DIMENSION.

758


How line capacitance & line inductance varies with increase in height tower.

999


what is the correct method for the outdoor termination of 19/33 KV HT cable step by step?

775


What is the difference between single core 2 wire and single core 3 wire system? Which application we are using this? and for What purpose we are using this?

986


what is the meaning of WYE and DELTA in Electric meter?

2344


is it value of power factor is more than unit. whats effects in the source supply

652


What is the relation between frequency and motor rpm?

495