Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How to calculate the load loss and no load losses of the power Transformer? i am having the following details : full load ct : in AMP HV :1676 ; LV:31.5 1800 KVA ;33KV/620 V for wind mill applications

ReasonSoft,

2 10797

working principle of UPS

Mantri,

15 76859

What is the technical reason for adopting color coding of three phase system as RYB.

ABB, ERDA,

11 17920




What is four quadrant metering system.

5 33905

What is harmonics. How does it get generated and means to arrest harmonics

Airtel,

8 12764

Difference B/W A/C & D/C Motors..?

Toyota,

10 11260

How does MCB operate without relay..?

Toyota,

10 18847

if we appling capacitor at above rated what are looses and what will be happen

Radiant, Real Estate,

4 3202




why do we need transformers?

12 32369

Why Humming noise originated in Starter motor and how it was generated ?

3 3874

i have attended the interview on 4th June,08 at Kolkata in IOCL, can anybody tell me what is its result

IOCL,

799

why transformer does not obey ohm law?

27 28812

Why high voltage lines (overhead ) are called high tension lines?

8 24347

say a transformer is designed for 33/11kv step down with ratio 0.33 for load 1 mva. if am giving 11kv as a input that same transformer what will happen to its o/p voltage. and whether it can be operated for 500kva

4 2650

hr round

867


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Un-Answered Questions { Electrical Engineering }

What is ferro-resonance in electrical system? Why it occurs and what are measures to prevent it?

1053


Pls Breifly explain about UPS (Inverter,Reserve,Rectifier,Float voltage,Boost voltage).

1538


sir please send me techinical questions for junior engineer posting in bangalore railway i am diploma holder

723


what are pilot cells

800


what are the maximum available current, voltage ratings and switching speeds of the power electronic devices thyristor, power mosfet, igbt, and mct?

836






Draw a SLD of DG distribution up to main LT panel?

6712


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 ?

797


HOW can i REuse the fused MLL LAMPS & GLS LAMPS at our factory

655


what is the difference between 2 way and 4 pole selector switch???

1019


A car's starter motor draws a current of 100 A at 12,0 V when starting the engine. The mechanical power required to turn the engine is 960 W. At what rate is energy from the battery converted to non-mechanical forms of energy?

739


how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

618


What is the effect on Power factor and capacitor when your company load is more than 70 % of welding transformer

467


STATE WORKING OF VACCUM CIRCUIT BRAKER?

717


how we provide neutral earth on synchronising panel as per electrical standards?

764


Why derating factor os applied on Cables?

745